The skeptical cardiologist received this reader comment recently:
So I went and got a Cardiac Calcium Score on my own since my cardiologist wouldn’t order one because he says they are basically voodoo.. Family History is awful for me.. I got my score of 320 and I’m 48 years old.. Doc looked at it and basically did the oh well.. so I switched docs and the other doc basically did the same thing.. I try so very hard to live a good lifestyle..I just don’t understand why docs wait so long to actually take a look at your heart.. I would have thought a score of 320 would have brought on more testing.. It did not..
It’s never too early to start thinking about your risk of cardiovascular disease. If heart disease runs in your family or you have any of the “risk-enhancing” factors listed above, consider a CAC, nontraditional lipid/biomarkers, or vascular screening to better determine where you stand and what you can do about it.
Here’s what I told this young man:
If your cardiologist tells you coronary calcium scores are voodoo I would strongly consider changing cardiologists.
A score of 320 at age 48 puts you in a very high risk category for stroke and heart attack over the next 10 years.
You need to find a physician who understands how to incorporate coronary calcium into his practice and will help you with lifestyle changes and medications to reduce that risk
Let’s analyze my points in detail and see if these off the cuff remarks are really justified
1, Changing cardiologists.
Recent studies and recent guideline recommendations (see here) all support utilization of CAC in this kind of patient. If you have a strong family history of premature heart disease or sudden death you want a cardiologist who is actively keeping up on the published literature in preventive cardiology, Such cardiologists are not dismissing CAC as “voodoo” they are incorporating it into their assessment of patient’s risk on a daily basis.
2. High risk of CAC score 320 at age 48
I plugged normal numbers for cholesterol and BP into the MESA risk calculator (see my discussion on how to use this here) for a 48 year old white male.
As you can see the high CAC score puts this patient at almost triple the 10 year risk of heart attack and stroke.
Immediate action is warranted to adjust lifestyle to reduce this risk! This high score will provide great motivation to the patient to stop smoking, exercise, lose excess weight, and modify diet.
Hidden risk factors such as lipoprotein(a), hs-CRP and LDL-P need to be assessed.
Drug treatment should be considered.
3. Find physician who will be more proactive in preventing heart disease
This may be the hardest part of all my recommendations. On your own you can get a CAC performed and advanced lipoprotein analysis.
However, finding progressive, enlightened, up-to-date preventive cardiologists can be a challenge.
We need a network of such cardiologists.
I frequently receive requests from readers or patients leaving St. Louis for recommendations on cardiologists.
If you are aware of such preventive cardiologists in your area email me or post in comments and I will keep a log and post on the website for reference.
The skeptical cardiologist saw a patient recently who had undergone stenting of a 95% blocked right coronary artery. Mr Jones had presented a year ago to our ER 2 days after he first began experiencing a light pressure-type discomfort in his left shoulder and scapular region. This pain persisted, waxing and waning, without a clear relationship to exertion or position or movement of his shoulder.
Upon arrival in the ER, his ECG was normal but his cardiac enzymes were slightly elevated (troponin peaking 0.92), thus he was diagnosed with a non-ST elevation myocardial infarction (MI).
He’s done great since the stent procedure fixed the coronary blockage that caused his infarct and chest pain, but during our office visit he related that since his hospitalization he had been feeling “logy.”
Being a lover of words, my ears perked up at this new-to-me adjective, and I asked him to describe what he meant by logy. For him, loginess was a feeling of fatigue or lacking energy.
Indeed, the online Merriam-Webster dictionary defines logy as sluggish or groggy. It is pronounced usually with a long o and a hard g.
The origin is unclear but has nothing to do with rum:
Based on surface resemblance, you might guess that “logy” (also sometimes spelled “loggy”) is related to “groggy,” but that’s not the case. “Groggy” ultimately comes from “Old Grog,” the nickname of an English admiral who was notorious for his cloak made of a fabric called grogram – and for adding water to his crew’s rum. The sailors called the rum mixture “grog” after the admiral. Because of the effect of grog, “groggy” came to mean “weak and unsteady on the feet or in action.” No one is really sure about the origin of “logy,” but experts speculate that it comes from the Dutch word log, meaning “heavy.” Its first recorded use in English, from an 1847 London newspaper, refers to a “loggy stroke” in rowing.
Fatigue is a common, nonspecific symptom that we all feel at times. It is more common as we age and it can be challenging for both patients and physicians to sort out when it needs to be further evaluated.
Occasionally, fatigue is the only symptom of a significant cardiac condition, but more frequently in the patient population I see it is either noncardiac (low thyroid, anemia, etc.) or iatrogenic.
When a patient tells me they are feeling fatigued I immediately scan their med list for potential logigenic drugs.
In this case, my patient had been started on a low dosage of the beta-blocker carvedilol (brand name Coreg) after his stent, and I suspected this was why he had felt logy for the past year.
In cardiology, we utilize beta-blockers in many situations-arrhythmias, heart failure, and heart attacks to name a few, and they are well-known to have fatigue as a common side effect. There was a really good chance that Mr. Jones’s loginess was due to the carvedilol.
It’s important to review all medications at each patient visit to check for side effects, interactions and benefits, and in the case of Mr. Jones’ carvedilol, loginess.
Do All Patients Post-Revascularization or Post-MI Need To Take Beta-Blockers
Beta-blockers (BBs) are frequently started in patients after a stenting procedure or coronary bypass surgery, and continued indefinitely. However, the evidence for their benefit in such patients with normal LV function long term is lacking.
If any post-revascularization population benefits from BBs, it is those, like Mr. Jones who have had a myocardial infarction (MI, heart attack) prior to the procedure, however the smaller the infarct, the less the benefits.
And with the widespread use of early stenting to treat MI, infarcts are much smaller and dysfunction of the left ventricle (LV) less likely.
In those patients with minimal damage and normal LV function, the benefits appear minimal. For this reason in the last 5 to 10 years I’ve been stopping BBs in this population if there are any significant side effects.
A 2015 meta-analysis of 10 observational acute MI studies including more than 40,000 patients showed that beta-blockers reduced the risk of all-cause death However, the benefit of these agents was not found in all subgroups and seemed confined to the patients with reduced LVEF, with low use of other secondary prevention drugs, or NSTEMI.
In a study of almost 180,000 patients post MI with normal LV systolic function in the UK between 2007 and 2013 there was no difference in mortality at one year in patients discharged with or without beta-blockers.
I’ll save readers the details, but the bottom line is that patients treated with optimal contemporary therapy for acute MI, whose LV function was not significantly impaired, did not benefit in any way from treatment with carvedilol, the beta-blocker my patient was taking.
It’s rare that we get such definitive evidence for a change in treatment that reverses what is in current guidelines. This has the potential to affect tens of thousands of patients and improve their quality of life. It should be trumpeted far and wide. The cynic in me suspects that if it were a study demonstrating the benefits of a new drug, physicians would be bombarded with the new information.
Helping Patients Feel Less Logy
We will be ordering an echocardiogram on Mr. Jones, and if his LV function is normal we will stop his carvedilol and see if he feels significantly better.
I feel like stopping a drug that is not beneficial and that is causing a lifetime of loginess is an incredibly important intervention a cardiologist can make. It’s not as life-saving as stenting for acute MI, but saving quality of life is something this non-invasive cardiologist can do every day for every patient.
N.B. The summary of the recent CAPITAL-RCT:
STEMI patients with successful primary PCI within 24 hours from the onset and with left ventricular ejection fraction (LVEF) ≥40% were randomly assigned in a 1-to-1 fashion either to the carvedilol group or to the no beta-blocker group within 7 days after primary PCI. The primary endpoint is a composite of all-cause death, myocardial infarction, hospitalization for heart failure, and hospitalization for acute coronary syndrome. Between August 2010 and May 2014, 801 patients were randomly assigned to the carvedilol group (N = 399) or the no beta-blocker group (N = 402) at 67 centers in Japan. The carvedilol dose was up-titrated from 3.4±2.1 mg at baseline to 6.3±4.3 mg at 1-year. During median follow-up of 3.9 years with 96.4% follow-up, the cumulative 3-year incidences of both the primary endpoint and any coronary revascularization were not significantly different between the carvedilol and no beta-blocker groups (6.8% and 7.9%, P = 0.20, and 20.3% and 17.7%, P = 0.65, respectively). There also was no significant difference in LVEF at 1-year between the 2 groups (60.9±8.4% and 59.6±8.8%, P = 0.06).
The skeptical cardiologist recently received this email from a reader:
With the new Apple Watch that’s out now, people have suggested my husband (who had a heart attack at 36) should get it since it could detect a heart attack. But I keep remembering what you said – that these devices can’t detect heart attacks and that Afib isn’t related to a heart attack most of the time – is that still the case? I don’t really know how to explain to people that it can’t do this, since absolutely everyone believes it does.
The answer is a resounding and unequivocal NO!
If we are using the term heart attack to mean what doctors call a myocardial infarction (MI) there should be no expectation that any wearable or consumer ECG product can reliably diagnose a heart attack.
The Apple Watch even in its latest incarnation and with the ECG feature and with rhythm monitoring activated is incapable of detecting a myocardial infarction.
To make this even clearer note that when you record an ECG on the Apple Watch it intermittently flashes the following warning:
Note: “Apple Watch never checks for heart attacks”
How did such this idea take root in the consciousness of so many Americans?
Perhaps this article in 9-5 Mac had something to do with it
In reality, the man received an alarm that his resting heart rate was high at night. Apparently he also was experiencing chest pain and went to an ER where a cardiac enzyme was elevated. Subsequently he underwent testing that revealed advanced coronary artery disease and he had a bypass operation.
Even if we assume all the details of this story are accurate it is absolutely not a case of Apple Watch diagnosing an MI.
A high resting heart rate is not neccessarily an indicator of an MI and most MIs are not characterized by high heart rates. We have had the technology with wearables to monitor resting heart rate for some time and no one has ever suggested this can be used to detect MI.
The rate of false alarms is so high and the rate of failure to diagnose MI so low that this is a useless measure and should not provide any patient reassurance.
The writer of this story and the editors at 9-5 Mac should be ashamed of this misinformation.
Several other news sources have needlessly muddied the water on this question including Healthline and Fox News:
In clear cut cases the Apple Watch could make the difference between life and death,” says Roger Kay, president of Endpoint Technologies Associates. Because you wear the Apple Watch at all times, it can detect an early sign of a stroke or a heart attack, and that early indication is critical, he says.
And the Healthline article on the new Apple Watch also incorrectly implies it can diagnose MI:
The device, which was unveiled last week, has an electrocardiogram (ECG) app that can detect often overlooked heart abnormalities that could lead to a heart attack.
And if you are felled by a heart problem, the fall detector built into the Apple Watch Series 4 could alert medical professionals that you need help
Fox News and Healthline should modify their published articles to correct the misinformation they have previously provided.
And it is still true that although both Apple Watch and Kardia can diagnose atrial fibrillation the vast majority of the time acute heart attacks are not associated with atrial fibrillation.
Readers, please spread the word far and wide to friends and family-Apple Watch cannot detect heart attacks!
The skeptical cardiologist has always had a fondness for push-ups. Therefore I read with interest a recent study published in JAMAOpen which looked at how many push-ups a group of 30 and 40-something male firefighters from Indiana could do and how that related to cardiovascular outcomes over the next ten years.
The British National Health Service pointed out that “The UK media has rather over exaggerated these findings:”
Both the Metro and the Daily Mirror highlighted the result of 40 push-ups being “the magic number” for preventing heart disease, but in fact being able to do 10 or more push-ups was also associated with lower heart disease risk.
What Was Studied?
The study involved 1,104 male firefighters (average age 39.6) from 10 fire departments in Indiana who underwent regular medical checks between 2000 and 2010.
At baseline the participants underwent a physical fitness assessment which included push-up capacity (hereafter referred to as the push-up number (PUN))and treadmill exercise tolerance tests conducted per standardized protocols.
For push-ups, the firefighter was instructed to begin push-ups in time with a metronome set at 80 beats per minute. Clinic staff counted the number of push-ups completed until the participant reached 80, missed 3 or more beats of the metronome, or stopped owing to exhaustion or other symptoms (dizziness, lightheadedness, chest pain, or shortness of breath). Numbers of push-ups were arbitrarily divided into 5 categories in increments of 10 push-ups for each category. Exercise tolerance tests were performed on a treadmill using a modified Bruce protocol until participants reached at least 85% of their maximal predicted heart rates, requested early termination, or experienced a clinical indication for early termination according to the American College of Sports Medicine Guidelines (maximum oxygen consumption [V̇ O2max]).
The main outcomes assessed were new diagnoses of heart disease from enrollment up to 2010.
Cardiovascular events were verified by periodic examinations at the same clinic or by clinically verified return-to-work forms. Cardiovascular disease–related events (CVD) were defined as incident diagnosis of coronary artery disease or other major CVD event (eg, heart failure, sudden cardiac death)
Here’s the graph of the probability of being free of a CVD event on the y-axis with time on x-axis.
The black line represents those 75 firefighters who couldn’t make it into double digits, the green those 155 who did more than 40 pushups.
Participants able to complete more than 40 push-ups had a significant 96% lower rate of CVD events compared with those completing fewer than 10 push-ups.
It is surprising that the push up number seemed a better predictor of outcomes than the exercise test, This should be taken with a grain of salt because although the investigators report out “VO2 max” the stress tests were not maximal tests.
The firefighters with lower push up numbers were fatter, more likely to smoke and had higher blood pressure, glucose and cholesterol levels.
What useful information can one take from this study?
You definitely cannot say that being able to do more than 40 pushups will somehow prevent heart disease. The PUN is neither causing nor preventing anything.
The PUN is a marker for the overall physical shape of these firefighters. It’s a marker for how these men were taking care of themselves. If you are a 39 year old fireman from Indiana and can’t do 11 push-ups you are in very sorry condition and it is likely evident in numerous other ways.
The <11 PUN crew were a bunch of fat, diabetic, insulin resistant, hyperlipidemic, out-of-shape hypertensives who were heart attacks in the waiting.
Push-ups Are A Great Exercise
Despite the meaningless of this study you should consider adding push-ups to your exercise routine. Doing them won’t save your life but it will contribute to mitigating the weakness and frailty of aging. Don’t obsess about your PUN.
I’ve always liked push-ups and highly recommend them. They require no special equipment or preparation. It’s a quick exercise that builds upper body muscle strength, adds to my core strength and gets my heart rate up a bit. For some reason my office in O’Fallon is always cold so several times during the day when I’m there I’ll do 100 jumping jacks and drop on the carpet and do some push-ups in an effort to get warm.
I don’t do them every day but the last time I tried I could do 50 in less than a minute and that has me convinced I will live forever!
Americans spend billions on useless supplements and vitamins in their search for better health but exercise is a superior drug, being free and without drug-related side effects
I’ve spent a lot of time on this blog emphasizing the importance of aerobic exercise for cardiovascular health but I also am a believer in strength and flexibility training for overall health and longevity.
As we age we suffer more and more from sarcopenia-a gradual decrease in muscle mass.
Scientific reviews note that loss of muscle mass and muscle strengh is quite common in individuals over age 65 and is associated with increased dependence, frailty and mortality
Push-ups are a great resistance exercise. For a description of the perfect form for a push up see here.
Since 1/3 of Americans die from atherosclerotic cardiovascular disease (ASCVD, mostly heart attacks and strokes) and dropping dead is often the first symptom of ASCVD it’s incredibly important to identify early, “subclinical” ASCVD and begin measures to reduce risk.
How early to begin that process is open to debate. The recent sudden death of the 41-year old son of a patient of mine, however, has reinforced to me how crucial it is to begin risk assessment and potential treatments as early as possible, especially in individuals with a strong family history of premature ASCVD.
We use standard risk factors like lipids, smoking, age, gender and diabetes to stratify individuals according to their 10 year risk of ASCVD (using this online risk calculator) but many apparent low risk individuals (often due to inherited familial risk) drop dead from ASCVD and many apparent high risk individuals have no subclinical ASCVD and don’t need preventive therapy.
Recent studies provide compelling support for the early utilization of cardiac imaging in to identify high risk individuals.
Heart attacks and most sudden cases of sudden death are due to rupture of atherosclerotic plaques. Thus, it makes sense to seek out such plaques, a process I call searching for subclinical atherosclerosis. There are a number of ways to search for sublinical plaques but the two most widely studied are carotid ultrasound screening and coronary artery calcification (CAC) measurement.
I’ve been utilizing CAC (also termed heart scan, coronary calcium score, or cardioscan) to help assess my patient’s risk of ASCVD for years although the procedure is not covered by insurance and until recently was not strongly endorsed by major guidelines. (For a complete description of the test and the risks/benefits see here). As I pointed out here, in November the new ACC/AHA guidelines finally embraced CAC for
adults 40 to 75 years of age without diabetes mellitus and with LDL-C levels ≥70 mg/dL- 189 mg/dL (≥1.8-4.9 mmol/L), at a 10-year ASCVD risk of ≥7.5% to 19.9%, if a decision about statin therapy is uncertain
Typically, if we have calculated (using the ASCVD risk estimator) a 10 year risk >7.5% we have a discussion with the patient about beginning drug treatment to reduce risk.
To inform the decision and help us “get off the fence” I usually recommend a CAC. To see how this works in a typical sixty something see my posts here and here.
Significant Of CAC Score
As the new ACC/AHA guidelines state:
If CAC is zero, treatment with statin therapy may be withheld or delayed, except in cigarette smokers, those with diabetes mellitus, and those with a strong family history of premature ASCVD.
A duo of studies from Walter Reed Army Hospital have provided more support for the value of the zero CAC for risk prediction and identifying who should get treatment for prevention of both heart attacks and strokes.
Over 10,00 subjects underwent CAC and were assessed for the primary outcomes of all-cause mortality, incident MI, stroke, and the combination of major adverse cardiovascular events (MACE), defined as stroke, MI, or cardiovascular death over an average 11.4 years
Patients were classified on the basis of the presence or absence of calcium and further subdivided into CAC score groups of 0, 1 to 100, 101 to 400, and >400
Patients without a zero CAC had a very low number of events , with a 1.0% rate of mortality and 2.7% rate of MACE over a 10-year period.
On the other hand subjects without any traditional risk factors (n = 6,208; mean age 43.8 years), the presence of any CAC (>0) was associated with a 1.7 fold increased risk of MACE after adjustment for traditional risk factors.
The red line of the >400 score individuals has a much higher risk of death, stroke and heart attack (myocardial infarction) than the blue (CAC 1-100) or the gray line of the zero CAC scorers.
Furthermore, when these investigators looked at outcomes in those individuals who received statins versus those who didn’t, the zeros didn’t benefit from statin therapy over the 10 year follow-up.
But there was a tremendous reduction in bad CV events in those with scores >100 who received statin (red line) versus those who did not (blue line).
Here’s the figure which encapsulates both the risk prediction power of the CAC (and the benefits of statin treatment restricted to those with >0 (blue lines)
Benefits of CAC Testing In The Young
So these new studies provide powerful data supporting the use of CAC in younger individuals to help us refine risk estimates and target the individual at high risk of MI and sudden death. It seems highly appropriate to consider CAC testing beginning at age 40 years as the AHA/ACC guidelines suggest.
But what about the individual who has a strong family history of premature CAD and is age say 35 or 39 years of age. Do we ignore advanced risk assessment? Very few individuals die in their 30s from ASCVD but I have a number of patients who suffered heart attacks in their forties. In addition, the earlier we can start risk modification the better as the process begins very early in life and accumulates over time.
The Coronary Artery Risk Development in Young Adults (CARDIA) Study published in 2017 has demonstrated the early development of nonzero CAC score in the youngish and the predictive value of the high CAC score for mid life ASCVD events. It was a prospective community-based study that recruited 5115 black and white participants aged 18 to 30 years from March 25, 1985, to June 7, 1986. The cohort has been under surveillance for 30 years, with CAC measured 15 (n = 3043), 20 (n = 3141), and 25 (n = 3189) years after recruitment. The mean follow-up period for incident events was 12.5 years, from the year 15 computed tomographic scan through August 31, 2014.
Any CAC in early adult life, even in those with very low scores, indicates significant risk of having and possibly dying of a myocardial infarction during the next decade beyond standard risk factors and identifies an individual at particularly elevated risk for coronary heart disease for whom aggressive prevention is likely warranted.
I read CAC scans every day and it is not uncommon to see a non-zero scores in individuals in their late 30s or early 40s.
The two sons of another one of my patients both in their late 50s with unremarkable risk factor profiles and both developing anginal type symptoms limiting their activities each underwent multi vessel stent procedures in the last month. If I had seen them 10 to 20 years ago we would have identified the subclinical atherosclerosis building up in their coronaries, started treatment and avoided the need for invasive, expensive procedures.
Other Risk-Enhancing Factors To Consider In The Young
The ACC/AHA guidelines list some “risk-enhancing factors” some of which I find useful.
Clearly family history of premature ASCVD is important but the devil is in the details. What relatives count? What was the event in the family member? If it was sudden death was an autopsy done?
What about nontraditional lipid/biomarkers? I consider an assessment of Lp(a) and some more sophisticated measurement of atherogenic dyslipidemia (apoB, LDL-P) and inflammation (CRP) essential.
Interestingly the guidelines include ABI (which I do not find helpful) but not carotid vascular screening which has frequently guided me to earlier therapy in youngish individuals with abnormal biomarkers or strong family history.
Vascular screening in young subjects may detect subclinical atherosclerosis as measured by thickening of the carotid wall (IMT) or early carotid plaque prior to the formation of calcium in the coronary arteries. Advanced IMT precedes the formation of soft plaque in arteries and only later is calcium deposited in the plaque.
It’s never too early to start thinking about your risk of cardiovascular disease. If heart disease runs in your family or you have any of the “risk-enhancing” factors listed above, consider a CAC, nontraditional lipid/biomarkers, or vascular screening to better determine were you stand and what you can do about it.
Included in my discussions with my patients with premature ASCVD is a strong recommendation to encourage their brothers, sisters and children to undergo a thoughtful assessment for ASCVD risk. With these new studies and the new ACC/AHA guideline recommendations if they are age 40-75 years there is ample support for making CAC a part of such assessment.
Hopefully very soon, CMS and the health insurance companies will begin reimbursement for CAC. As it currently stands, however, the 125$ you will spend for the test at my hospital is money well spent.
Until recently I had never heard of Bob Harper (The Biggest Loser) but apparently he is a celebrity personal trainer and had a heart attack and nearly died. He is known “for his contagious energy, ruthless training tactics, and ability to transform contestants’ bodies on The Biggest Loser” (a show I’ve never seen.)
When celebrities die suddenly (see Garry Sanders, Carrie Fischer) or have a heart attack at a youngish age despite an apparent healthy lifestyle this get’s people’s attention.
The media typically pounce on the story which combines the seductive allure of both health and celebrity reporting.
It turns out Harper inherited a high Lipoprotein (a) (see here) which put him at high risk for coronary atherosclerosis (CAD) which ultimately caused the heart attack (MI) that caused his cardiac arrest.
To his credit, Harper has talked about Lipoprotein (a) and made the public and physicians more aware of this risk factor which does not show up in standard cholesterol testing.
Since his heart attack, Mr. Harper of “The Biggest Loser” has embarked on a newfound mission to raise awareness about heart disease and to urge people to get tested for lp(a).
Harper As Brilinta Shill
Unfortunately , he has also become a shill for Brilinta, an expensive brand name anti platelet drug often prescribed in patients after heart attacks or stents.
At the end of the TV commercial he says “If you’ve had a heart attack ask your doctor if Brilinta is right for you. My heart is worth Brilinta.”
At least this video is clearly an advertisement but patients and physicians are inundated by infomercials for expensive, profit-driving drugs like Brilinta.
This Healthline article pretends to be a legitimate piece of journalism but is a stealth ad for Brilinta combined with lots of real ads for Brilinta.
Harper As Lifestyle Coach.
Harper also changed his fitness and diet regimens after his MI reasoning that something must have been wrong with his lifestyle and it needed modification. For the most part he talks about more “balance” in his life which is good advice for everyone. His fitness regimens pre-MI were incredibly intense and have been toned down subsequently.
Of course, vegans and vegetarians have seized on this change in his diet as somehow proving the superiority of their chosen diets as in this vegan propaganda video:
Unfortunately there is no evidence that changing to a vegan or vegetarian diet will lower his risk of repeat MI. Those who promote the Esselstyn, Pritikin or Ornish type diets claim to “reverse heart disease” and to be science-based but, as I’ve pointed out (see here) the science behind these studies is really bad.
What Can We Really Learn From Bob Harper’s Experience?
Lipoprotein (a) is a significant risk marker for early CAD/MI/sudden cardiac death. Consider having it measured if you have a a) strong family history of premature deaths/heart attack (b) if you have developed premature subclinical atherosclerosis (see here) or clinical atherosclerosis (heart attack, stroke, peripheral vascular disease) or (c) a family member has been diagnosed with it.
Everyone should learn how to do CPR and how to utilize an AED. (see here for my rant on these two incredibly important 3-letter words). Harper was working out in the gym when he collapsed. Fortunately a nearby medical student had the wherewithal to do CPR on him until he could be defibrillated back to a normal rhythm and transported to a hospital to stop his MI.
Dropping dead suddenly is often the first indicator that you have advanced CAD. If you have a strong family history of sudden death or early CAD consider getting a coronary artery calcium scan to better assess your risk.
Focus on celebrities with heart disease helps bring awareness to the public about important issues but we can only learn so much about best lifestyle or medications from the experience of one individual, no matter how famous.
There is still no reason to take over the counter fish oil supplements.
In fact, a study published Saturday found that fish oil supplementation (1 g per day as a fish-oil capsule containing 840 mg of n−3 fatty acids, including 460 mg of eicosapentaenoic acid [EPA] and 380 mg of docosahexaenoic acid [DHA]
did not result in a lower incidence than placebo of the primary end points of major cardiovascular events (a composite of myocardial infarction, stroke, or death from cardiovascular causes) and invasive cancer of any type.
However, another study published Saturday (REDUCE-IT) and presented at the annual American Heart Association Scientific Sessions to great fanfare found that an ethyl-ester formulation (icosapent ethyl) of eicosapentanoic acid (EPA, one of the two main marine n-3 fish oils) reduced major cardiovascular events by 25% in comparison to placebo.
When I wrote about Icosapent ethyl (brand name Vascepa) in a previous blog post in 2015 there was no data supporting its use:
A fish oil preparation, VASCEPA, available only by prescription, was approved by the FDA in 2012.
Like the first prescription fish oil available in the US, Lovaza, VASCEPA is only approved by the FDA for treatment of very high triglycerides(>500 mg/dl).
This is a very small market compared to the millions of individuals taking fish oil thinking that it is preventing heart disease.
The company that makes Vascepa (Amrin;$AMRN)would also like to have physicians prescribe it to their patients who have mildly or moderatelyelevated triglycerides between 200 and 500 which some estimate as up to 1/3 of the population.
Given the huge numbers of patients with trigs slightly above normal, before approving an expensive new drug, the FDA thought, it would be nice to know that the drug is actually helping prevent heart attacks and strokes or prolonging life.
After all, we don’t really care about high triglycerides unless they are causing problems and we don’t care about lowering them unless we can show we are reducing the frequency of those problems.
Data do not exist to say that lowering triglycerides in the mild to moderate range by any drug lowers heart attack risk.
In the past if a company promoted their drug for off-label usage they could be fined by the FDA but Amarin went to court and obtained the right to promote Vascepa to physicians for triglycerides between 200 and 500.
Consequently, you may find your doctor prescribing this drug to you. If you do, I suggest you ask him if he recently had a free lunch or dinner provided by Amarin, has stock in the company (Vascepa is the sole drug made by Amarin and its stock price fluctuates wildly depending on sales and news about Vascepa) or gives talks for Amarin.
If he answers no to all of the above then, hopefully, your triglycerides are over 500.
And although elevated triglycerides confer an elevated CV risk nearly all prior trials evaluating different kinds of triglyceride-lowering therapies, including extended-release niacin, fibrates, cholesteryl ester transfer protein inhibitors, and omega-3 fatty acids have failed to show reductions in cardiovascular events
REDUCE-IT, Amarin trumpeted widely in September (before the actual data was published) now provides impressive proof that it prevents cardiovascular disease. Has the skeptical cardiologist changed his mind about fish oil?
Vascepa Is Not Natural Fish Oil
Although Amarin’s marking material states “VASCEPA is obtained naturally from wild deep-water Pacific Ocean fish” the active ingredient is an ethyl ester form of eicosapentoic acid (EPA) which has been industrially processed and distilled and separated out from the other main omega-3 fatty acid in fish oil (DHA or docosohexanoieic acid).
Natural fish oil contains a balance of EPA and DHA combined with triacylglycerols (TAGS).
So even if the REDUCE-IT trial results can be believed they do not support the routine consumption of over the counter fish oil supplements for prevention of cardiovascular disease.
Does REDUCE-IT Prove The Benefit of Purified High Dose EPA?
REDUCE-IT was a large (8179 patients) randomized, double-blind placebo controlled trial
Eligible patients had a fasting triglyceride level of 150 to 499 mg per deciliter and a low-density lipoprotein (LDL) cholesterol level of 41 to 100 mg per deciliter and had been receiving a stable dose of a statin for at least 4 weeks. In 2013 the protocol was changed and required a triglyceride level>200 mg/dl.
Participants were randomized to icosapent ethyl (2 g twice daily with food [total daily dose, 4 g]) or a placebo that contained mineral oil to mimic the color and consistency of icosapent ethyl and were followed for a median of 4.9 years. A primary end-point event occurred in 17.2% of the patients in the icosapent ethyl group, as compared with 22.0% of the patients in the placebo group.
More importantly, the hard end-points of CV death, nonfatal stroke and heart attack were also significantly lower in the Vascepa arm compared to the “placebo” arm.
These results are almost unbelievably good and they are far better than one would have predicted given only a 17% reduction in triglycerides.
This makes me strongly consider prescribing Vascepa (something I heretofore have never done) to my higher risk patients with triglycerides over 200 after we’ve addressed lifestyle and dietary contributors.
Perhaps the high dose of EPA (4 grams versus the 1 gram utilized in most trials) is beneficial in stabilizing cell membranes, reducing inflammation and thrombotic events as experimental data has suggested.
Lingering Concerns About The Study
Despite these great results I have some concerns:
The placebo contained mineral oil which may not have been neutral in its effects. In fact, the placebo arm had a significant rise in the LDL cholesterol.
Enrolled patients were predominantly male and white. No benefit was seen in women.
Higher rates of serious bleeding were noted in patients taking Vascepa
Atrial fibrillation developed significantly more often in Vascepa patients (3.1%) versus the mineral oil patients (2.1%)
Finally, the trial was sponsored by Amarin Pharma. This is an aggressive company that I don’t trust. The steering committee consisted of academic physicians (see the Supplementary Appendix), and representatives of the sponsor developed the protocol, and were responsible for the conduct and oversight of the study, as well as the interpretation of the data. The sponsor was responsible for the collection and management of the data. All the data analyses were performed by the sponsor,
After i wrote my negative piece on Vascepa in 2015 a number of Amarin investors attacked me because Vascepa is the only product Amarin has and any news on the drug dramatically influences its stock price. Here is the price of Amarin stock in the last year.
The dramatic uptick in September corresponds to the company’s announcement of the topline results of REDUCE-IT. Since the actual results have been published and analyzed the stock has dropped 20%.
High Dose Purified and Esterified EPA-Yay or Nay?
I would love to see another trial of high dose EPA that wasn’t totally under the control of Amarin and such trials are in the pipeline.
Until then, I’ll consider prescribing Amarin’s pills to appropriate patients* who can afford it and who appear to have significant residual risk after statin therapy*.
But, I will continue to tell my patients to stop paying money for useless OTC fish oil supplements.
N.B.* Appropriate patients will fit the entry criteria for REDUCE-IT described below.
Patients could be enrolled if they were 45 years of age or older and had established cardiovascular disease or were 50 years of age or older and had diabetes mellitus and at least one additional risk factor. Eligible patients had a fasting triglyceride level of 150 to 499 mg per deciliter (1.69 to 5.63 mmol per liter) and a low-density lipoprotein (LDL) cholesterol level of 41 to 100 mg per deciliter (1.06 to 2.59 mmol per liter) and had been receiving a stable dose of a statin for at least 4 weeks;
So either secondary prevention (prior heart attack or stroke) or primary prevention in patients with diabetes and another risk factor.
The skeptical cardiologist has been utilizing coronary artery calcium (CAC) scans to help decide which patients are at high risk for heart attacks, and sudden cardiac death for the last decade. As I first described in 2014, (see here) those with higher than expected calcium scores warrant more aggressive treatment and those with lower scores less aggrressive treatment.
Although , as I have discussed previously, CAC is not the “mammography of the heart” it is incredibly helpful in sorting out personalized cardiovascular risk. We use standard risk factors like lipids, smoking, age, gender and diabetes to stratify individuals according to their 10 year risk of atherosclerotic cardiovascular disease (ASCVD) but many apparent low risk individuals (often due to inherited familial risk) drop dead from ASCVD and many apparent high risk individuals don’t need statin therapy.
Previously, major guidelines from organizations like the AHA and the ACC did not recommend CAC testing to guide decision-making in this area. Consequently, CMS and major insurers have not covered CAC testing. When my patients get a CAC scan they pay 125$ out of their pocket.. For the affluent and pro-active this is not an obstacle, however those struggling financially often balk at the cost.
I was, therefore, very pleased to read that the newly updated AHA/ACC lipid guidelines (full PDF available here) emphasize the use of CAC for decision-making in intermediate risk patients.
For those patients aged 40-75 without known ASCVD whose 10 year risk of stroke and heart attack is between 7.5% and 20% (intermediate, see here on using risk estimator) the guidelines recommend “consider measuring CAC”.
If the score is zero, for most consider no statin. If score >100 and/or >75th percentile, statin therapy should be started.
I don’t agree totally with this use of CAC but it is a step forward. For example, how I approach a patient with CAC of 1-99 depends very much on what percentile the patient is at. A score of 10 in a 40 year old indicates marked premature build up of atherosclerotic plaque but in a 70 year old man it indicates they are at much lower risk than predicted by standard risk factors. The first individual we would likely recommend statin therapy and very aggressive lifestyle changes whereas the second man we could discuss taking off statins.
Neil Stone, MD, one of the authors of the guidelines was quoted as saying that the imaging technique is “the best tiebreaker we have now” when the risk-benefit balance is uncertain.
“Most should get a statin, but there are people who say, ‘I’ve got to know more, I want to personalize this decision to the point of knowing whether I really, really need it.’ … There are a number of people who want to be certain about where they stand on the risk continuum and that’s how we want to use it,”
Indeed, I’ve written quite a bit about my approach to helping patients “get off the fence” on whether or not to take a statin drug.
Full title of these new guidelines includes an alphabet soup of organization acronyms
2018 AHA/ACC/AACVPR/AAPA/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Blood Cholesterol
N.B. For your reading pleasure I’ve copied the section in the new guidelines that discusses in detail coronary artery calcium.
Two interesting sentences which I’ll need to discuss some other time
-When the CAC score is zero, some investigators favor remeasurement of CAC after 5 to 10 years
–CAC scans should be ordered by a clinician who is fully versed in the pros and cons of diagnostic radiology.
–In MESA (Multi-Ethnic Study of Atherosclerosis), CAC scanning delivered 0.74 to l.27 mSv of radiation, which is similar to the dose of a clinical mammogram
-220.127.116.11. Coronary Artery Calcium
Substantial advances in estimation of risk with CAC scoring have been made in the past 5 years. One purpose of CAC scoring is to reclassify risk identification of patients who will potentially benefit from statin therapy. This is especially useful when the clinician and patient are uncertain whether to start a statin. Indeed, the most important recent observation has been the finding that a CAC score of zero indicates a low ASCVD risk for the subsequent 10 years (S18.104.22.168-1–S22.214.171.124-8). Thus, measurement of CAC potentially allows a clinician to withhold statin therapy in patients showing zero CAC. There are exceptions. For example, CAC scores of zero in persistent cigarette smokers, patients with diabetes mellitus, those with a strong family history of ASCVD, and possibly chronic inflammatory conditions such as HIV, may still be associated with substantial 10-year risk (S126.96.36.199-9–S188.8.131.52-12). Nevertheless, a sizable portion of middle-aged and older patients have zero CAC, which may allow withholding of statin therapy in those intermediate risk patients who would otherwise have a high enough risk according to the PCE to receive statin therapy (Figure 2). Most patients with CAC scores ≥100 Agatston units have a 10-year risk of ASCVD≥7.5%, a widely accepted threshold for initiation of statin therapy (S184.108.40.206-13). With increasing age, 10- year risk accompanying CAC scores of 1 to 99 rises, usually crossing the 7.5% threshold in later middle age (S220.127.116.11-13). When the CAC score is zero, some investigators favor remeasurement of CAC after 5 to 10 years (S18.104.22.168-14–S22.214.171.124-16). CAC measurement has no utility in patients already treated with statins. Statins are associated with slower progression of overall coronary atherosclerosis volume and reduction of high-risk plaque features, yet statins increase the CAC score (S126.96.36.199-17). A prospective randomized study of CAC scoring showed improved risk factor modification without an increase in downstream medical testing or cost (S188.8.131.52-18). In MESA (Multi-Ethnic Study of Atherosclerosis), CAC scanning delivered 0.74 to l.27 mSv of radiation, which is similar to the dose of a clinical mammogram (S184.108.40.206- 19). CAC scans should be ordered by a clinician who is fully versed in the pros and cons of diagnostic radiology.
Downloaded from http://ahajournals.org by on November 11, 2018
from Grundy SM, et al.
2018 Cholesterol Clinical Practice Guidelines
Four years ago the skeptical cardiologist wrote the (in his extremely humble and biased opinion) the definitive post on aspirin and cardiovascular disease. Entitled “Should I take aspirin to prevent stroke or heart attack“, it pointed out that although Dr. Oz had recently told almost all middle-aged women to take a baby aspirin and fish oil, there was, in fact no evidence to support that practice.
The publication of the ASPREE (Aspirin in Reducing Events in the Elderly) trial results in the latest issue of the New England Journal of Medicinefurther strengthens the points I made in 2014.
Between 2010 and 2014 the ASPREE investigators enrolled over 19,000 community-dwelling persons in Australia and the United States who were 70 years of age or older (or ≥65 years of age among blacks and Hispanics in the United States) and did not have cardiovascular disease, dementia, or disability.
(It’s important to look closely at the precise inclusion and exclusion criteria in randomized studies to understand fully the implications of the results (for example, what qualified as cardiovascular disease) and I’ve listed them at the end of this post.)
Study participants were randomly assigned to receive 100 mg of enteric-coated aspirin or placebo. At the end of the study about 2/3 of participants in both groups were still taking their pills.
When I wrote about aspirin in 2014 I focused on cardiovascular disease. At that time, there was some reasonable evidence that aspirin might lower the risk of colorectal cancer. But when we look at outcomes the bottom line is how the drug influences the overall mix of diseases and deaths.
The ASPREE researchers chose disability-free survival, defined as survival free from dementia or persistent physical disability (inability to perform or severe difficulty in performing at least one of the six basic activities of daily living that had persisted for at least 6 month) as their primary end-point which makes a lot of sense-patients don’t want to just live longer, they want to live longer with a good quality of life. If aspirin, to take a totally hypothetical example) is stopping people from dying from heart attacks but making them demented it’s not benefiting them overall.
After 5 years there was no difference in the rate of death, dementia or permanent physical disability between the aspirin group (21.5 events per 1000 person-years) and placebo group (21.2 per 1000).
However those taking aspirin had a significantly higher rate of major bleeding (3.8%) than those taking placebo (2.8%).
The risk of death from any cause was 12.7 events per 1000 person-years in the aspirin group and 11.1 events per 1000 person-years in the placebo group.. Cancer was the major contributor to the higher mortality in the aspirin group, accounting for 1.6 excess deaths per 1000 person-years.
And, despite prior analyses suggesting aspirin reduces colorectal cancer the opposite was found in this study. Aspirin takers were 1.8 times more likely to die from colorectal cancer and 2.2 times more likely to die from breast cancer.
After a median of 4.7 years of follow-up, the rate of cardiovascular disease was 10.7 events per 1000 person-years in the aspirin group and 11.3 events per 1000 person-years in the placebo group (hazard ratio, 0.95; 95% confidence interval [CI], 0.83 to 1.08). The rate of major hemorrhage was 8.6 events per 1000 person-years and 6.2 events per 1000 person-years, respectively (hazard ratio, 1.38; 95% CI, 1.18 to 1.62; P<0.001).
The ASPREE study confirms what I advised in 2014 and hopefully will further reduce the inappropriate consumption of aspirin among low risk individuals.
I’ve taken more patients off aspirin since 2014 than I’ve started on and what I wrote then remains relevant and reflects my current practice. Especially in light of the increase cancer risk noted in ASPREE patients should only take aspirin for good reasons.
Aspirin is a unique drug, the prototypical two-edged sword of pharmaceuticals. It t has the capability of stopping platelets, the sticky elements in our blood, from forming clots that cause strokes and heart attacks when arterial plaques rupture, but it increases the risk of serious bleeding into the brain or from the GI tract. Despite these powerful properties, aspirin is available over the counter and is very cheap, thus anyone can take it in any dosage they want.
Who Should Take Aspirin?
For the last five years I’ve been advising my patients who have no evidence of atherosclerotic vascular disease against taking aspirin to prevent heart attack and stroke. Several comprehensive reviews of all the randomized trials of aspirin had concluded by 2011 that
The current totality of evidence provides only modest support for a benefit of aspirin in patients without clinical cardiovascular disease, which is offset by its risk. For every 1,000 subjects treated with aspirin over a 5-year period, aspirin would prevent 2.9 MCE and cause 2.8 major bleeds.
(MCE=major cardiovascular events, e.g. stroke, heart attack, death from cardiovascular disease)
Dr. Oz, on the other hand, came to St. Louis in 2011 to have lunch with five hundred women and advised them all to take a baby aspirin daily (and fish oil, which is not indicated for primary prevention as I have discussed here). When I saw these women subsequently in my office I had to spend a fair amount of our visit explaining why they didn’t need to take aspirin and fish oil.
After reviewing available data, the FDA this week issued a statementrecommending against aspirin use for the prevention of a first heart attack or stroke in patients with no history of cardiovascular disease (i.e. for primary prevention). The FDA pointed out that aspirin use is associated with “serious risks,” including increased risk of bleeding in the stomach and brain. As for secondary prevention for people with cardiovascular disease or those who have had a previous heart attack or stroke (secondary prevention), the available evidence continues to support aspirin use.
Subclinical Atherosclerosis and Aspirin usage
As I’ve discussed previously, however, many individuals who have not had a stroke or heart attack are walking around with a substantial burden of atherosclerosis in their arteries. Fatty plaques can become quite advanced in the arteries to the brain and heart before they obstruct blood flow and cause symptoms. In such individuals with subclinical atherosclerosis aspirin is going to be much more beneficial.
Guided Use of Aspirin
We have the tools available to look for atherosclerotic plaques before they rupture and cause heart attacks or stroke. Ultrasound screening of the carotid artery, as I discussed here, is one such tool: vascular screening is an accurate, harmless and painless way to assess for subclinical atherosclerosis.
Coronary calcium is another, which I’ve written extensively about.
In my practice, the answer to the question of who should or should not take aspirin is based on whether my patient has or does not have significant atherosclerosis. If they have had a clinical event due to atherosclerotic cardiovascular disease (stroke, heart attack, coronary stent, coronary bypass surgery, documented blocked arteries to the legs) I recommend they take one 81 milligram (baby) uncoated aspirin daily. If they have not had a clinical event but I have documented by either
Incidentally discovered significant plaque in the aorta or peripheral arteries (found by CT or ultrasound done for other reasons)
then I recommend a daily baby aspirin (assuming no high risk of bleeding).
There are no randomized trials testing this approach but in the next few years several large aspirin trials will be completed and hopefully we will get a better understanding of who benefits most from aspirin for primary prevention.
Until then remember that aspirin is a powerful drug with potential for good and bad effects on your body. Only take it if you and your health care provider have decided the benefits outweigh the risks after careful consideration of your particular situation
The inclusion criteria for ASPREE define significant cardiovascular disease as follows
a past history of cardiovascular or cerebrovascular event or established CVD, defined as myocardial infarction (MI), heart failure, angina pectoris, stroke, transient ischemic attack, >50% carotid stenosis or previous carotid endarterectomy or stenting, coronary artery angioplasty or stenting, coronary artery bypass grafting, abdominal aortic aneurysm
I mentioned at that time that Honey-Nut Cheerios was the #1 selling ready-to-eat breakfast cereal and Cheerios #4. This update indicates little has changed in the rankings or consumption of breakfast cereal since then despite a more widespread recognition that added sugar is the major toxin in our diet and that these food items are basically a vehicle for sugar.
Apparently, Americans believe honey is not sugar. But Honey Nut Cheerios contain 9 times as much sugar as cheerios. Here are the top ingredients:
General Mills tries to emphasize the healthiness of Honey Nut Cheerios, focusing on their close relationship with bees and the natural goodness of honey in its advertising along with other factors that we now know are not important (low fat, 12 vitamins and minerals, source of iron).
Little has changed with respect to the science supporting fiber consumption to reduce cardiovascular disease since 2014. It is still weak and based on observational studies and surrogate biomarkers.
Between the lines below is my original post with current annotations in red.
The skeptical cardiologist usually eschews the breakfast offerings in the Doctor’s lounge. I’m not really interested in consuming donuts, muffins, or bagels with their high carbohydrate load. As I’ve ranted out about previously, the only yogurt available is Yoplait low fat , highly sugared-up yogurt which is arguably worse than starting the day with a candy bar.
A selection of breakfast cereals is available including Cheerios, Raisin Bran, and Frosted Flakes. Occasionally, when I have neglected to bring in my own full-faty yogurt, granola and/or fruit I will open up one of the Cheerios containers and consume a bowl mixed with 2% milk (full-fat, organic milk which I passionately advocate here and here is not available) (2018 update, I have said “cheerio” to all breakfast cereals and no longer eat Cheerios in the doctor’s lounge).
Pondering the Cheerios packaging and the cute little O’s made me wonder whether this highly processed and packaged food with a seemingly endless shelf life was truly a healthy choice.
The “Ready-To-Eat” And Allegedly Heart-Healthy Cereal
Cheerios and Honey-nut cheerios were the #4 and #1 breakfast cereals in the US in 2013, generating almost a billion dollars in sales. Both of these General Mills blockbusters undoubtedly have reached their popularity by heavily promoting the concept that they are heart healthy.
The Cheerios label is all about the heart. The little O’s sit in a heart-shaped bowl. A prominent red heart with a check inside it attests to the AHA having certified Cheerios as part of its checkmark.heart.org program. Additional text states “low in Saturated fat and cholesterol” and “diets low in saturated fat and cholesterol may reduce the risk of heart disease.”
Is The Fiber In Cheerios “Heart-Healthy” ?
Beta-glucan is a soluble fiber primarily located in the endosperm cell wall of oats. Early studies showed that oats and beta-glucan soluble fiber could reduce total and LDL (bad cholesterol) levels. The mechanism isn’t really known. (see the end of post for possible mechanisms). The Quaker oats web site oversimplifies the mechanism thusly :
“In your digestive tract, it acts as a sponge, soaking up cholesterol and carrying it out of the body”
This narrative fits with the oversimplified and now discredited descriptions of atherosclerosis which attribute it directly to consumption of cholesterol and fatty acids. See here if you’d like to appreciate how complex the process truly is.
The FDA Sanctions Oats As Heart Healthy
In 1997, the FDA reviewed 33 studies (21 showing benefit and 12 not) and decided to allow a health claim for foods that contain oats and soluble fiber. A minimum dose of 3 grams/day of oat beta-glucan was suggested for a beneficial reduction in blood cholesterol and (presumably, although never documented) a subsequent decline in coronary heart disease.
In 1998 Johnson, et al, published the results of a study funded by a grant from General Mills that showed that inclusion of whole grain oat ready to eat cereal providing 3 grams of beta-glucan as part of a low fat diet reduced LDL cholesterol by 4% after 6 weeks. HDL was unchanged. Patients in this study consumed 45 grams (1.5 oz) of cheerios at breakfast and then again in the evening. There was a total of 3 grams of soluble fibre in this amount of Cheerios. A control group consumed corn flakes in a similar fashion without change in LDL.
General Mills took this weak data and ran with it and began posting on Cheerios the following statements
“Did you know that in just 6 weeks Cheerios can reduce bad cholesterol by an average of 4 percent? Cheerios is … clinically proven to lower cholesterol. A clinical study showed that eating two 1 1/2 cup servings daily of Cheerios cereal reduced bad cholesterol when eaten as part of a diet low in saturated fat and cholesterol.”
Although the FDA had approved verbiage indicating oats may reduce heart disease “when eaten as part of a diet low in saturated fat and cholesterol” the agency objected to General Mills claiming that Cheerios lowers cholesterol “when eaten as part of a diet low in saturated fat and cholesterol”.
The FDA issued a warning letter to General Mills in 2009 in which the agency alleged “serious violations” of the FDC Act in the label and labeling of Cheerios cereal.
Based on claims made on your product’s label, we have determined that your Cheerios® Toasted Whole Grain Oat Cereal is promoted for conditions that cause it to be a drug because the product is intended for use in the prevention, mitigation, and treatment of disease.
Lowering Cholesterol Is Not The Same As Preventing Heart Disease
The FDA was telling General Mills that it was OK to say that Cheerios may reduce heart disease but not that it can reduce cholesterol because that made it a drug. It makes no sense.
The only thing that had been demonstrated for oat soluble fiber and Cheerios in particular was a reduction in cholesterol. There has never been a study with oats showing a reduction in heart disease..
It’s the heart disease, the atherosclerosis clogging our arteries and causing heart attacks and strokes that we want to prevent. We could care less about lowering cholesterol if it doesn’t prevent atherosclerosis.
A recent review of studies since the FDA ruling shows that 70% of studies show some reduction in LDL with beta-glucan. Interstingly, the studies which added beta-glucan to liquids were generally positive whereas addition to solids such as muffins usually did not show benefit.
I’m going to accept as evidence-based the claim that whole oats can lower your LDL about 7% if you consume a very large amount of them on a daily basis.
However, the critical question for any drug or dietary intervention is does it prevent atherosclerosis, the root cause of heart attacks and strokes. There has been in the past an assumption that lowering cholesterol by any means would result in lowering of atherosclerosis.
This theory has been disproven by recent studies showing that ezetimibe and niacin which significantly lower LDL do not reduce surrogate markers of atherosclerosis or cardiovascular events any more than placebo when added on to statin drugs. (There is now weak evidence that ezetimibe does lower cardiovascular events ). The recently revised cholesterol guidelines endorse the concept of treating risk of atherosclerosis rather than cholesterol levels.
I do like the food writer Michael Pollan’s simple rules to “Eat Food. Mostly Plants. Not Too Much.” and this NY Times piece summarizes much of what is in his short, funny and helpful Food Rules book:
you’re much better off eating whole fresh foods than processed food products. That’s what I mean by the recommendation to eat “food.” Once, food was all you could eat, but today there are lots of other edible foodlike substances in the supermarket. These novel products of food science often come in packages festooned with health claims, which brings me to a related rule of thumb: if you’re concerned about your health, you should probably avoid food products that make health claims. Why? Because a health claim on a food product is a good indication that it’s not really food, and food is what you want to eat.
If you follow Pollan’s dictum you will get plenty of fiber, soluble or otherwise and you will avoid the necessity to obsess over the macronutrients in your diet, fiber or otherwise. Throw in some Cheerios and oatmeal every once in a while if you like them; in their unadulterated state they are a heart-healthy food choice.