The skeptical cardiologist nut project (aka the nutty cardiologist project) now has a logo. Say hello to the world’s only walnut-auscultating promoter of nut consumption. Soon you will see his smiling face on the packets of nuts I’ll be handing out to help defeat cardiovascular disease.
Special thanks to my wonderful Washington University computer-science major and bass guitar wiz daughter, Gwyneth, for creating the squirrel doctor during her winter break.
I promised 10 bags of nuts and “oodles of glory” to the reader whose name I selected but I can’t identify who proposed Heart Nuts. Let me know who you are and I’ll get the nuts to you.
Now I need a name for the squirrel.
See here for my post on KIND bars versus Simply Nuts and here for my review of nuts, drupes and legumes and reduced mortality.
N.B. Nuts are recognized as promoting reduced cholesterol, oxidative stress, and insulin resistance thereby reducing the risk of cardiovascular disease.
I’ve focused on their cardiovascular benefits (perhaps mediated by dietary fiber, magnesium, polyunsaturated fats, vitamin E, and antioxidants) but recent studies suggest other health benefits that could contribute to improved longevity.
Nuts contain bioactive compounds both known (ellagic acid, anacardic acid, genistein, resveratrol, and inositol phosphates) and unknown which may reduce the risk of cancer or other chronic diseases.
A recent meta-analysis found that consuming one serving of nuts per day was associated with a 15% lower risk of any cancer and a 22% lower risk of dying from any cause.
The skeptical cardiologist and his Eternal Fiancee’ have escaped dreary and oceanopenic St. Louis and are spending a week in allegedly sunny and definitely beachy San Diego.
Upon arrival we took in a Farmer’s Market in Little Italy and stumbled into Ironside Fish and Oyster.
Always in search of heart-healthy, unique and local fish dishes, I spotted on the menu a luncheon special of sheepshead fish.
California sheepshead (Semicossyphuspulcher), the existence of which I was previously unaware, turned out to be a fascinating and most delicious fish.
Before I could order it, I had to verify that I wasn’t contributing to the extinction of a species. The IUCN Red List of Threatened species lists the CS as “vulnerable” because:
“The natural history of this species, including its limited geographic range along inshore habitat, the likely increasing interest in the fishery and the currently unsustainable fishing levels (according to the models of Alonzo et al. 2004), together with the difficulties in enforcing existing regulations strongly suggest that this species will continue to decline if stronger protective action is not put into place. “
After learning the CS was vulnerable, I had to make a critical decision: should I eat it before it disappeared, robbing me of a chance to ever taste it, or should I order something that wasn’t vulnerable, thus contributing to the preservation of the continuing biodiversity of the planet. I elected to taste it.
Gender Fluid Fish
Further research revealed that the CS transitions from a reproductively functional female at birth, to a functional male during the course of a lifespan in response to social factors (?reverse Bruce Jenner).
In some sequentially hermaphroditic fish species, animals develop first as male and then switch to female (a condition called protandry), and in others, the individuals develop first as female and then switch to male (protogyny).
Clownfish (as in Finding Nemo) do the opposite of the sheepshead and are protandrous:
This species lives within sea anemones in groups of two large fish and many small fish. The two large fish are the only sexually mature fish and are a male and female breeding pair. All of the smaller fish are male. If the large breeding female is removed, her male mate changes sex to female and the next largest fish in the group rapidly increases in size and takes over the role as the sexually mature male.
While waiting for the vulnerable and sequentially hermaphroditic sheepshead to arrive, I sampled an equally
stupendous and heart-healthy side of cannelloni bean cassoulet. Chock full of Mediterranean diet essentials including kale, beans and mustard seeds, it worked really well as an appetizer.
Do not make the mistake of looking at this youtube video while waiting for your sheepshead entree’ as I did. The disturbing human-like teeth will not be part of your meal.
Finally, the 4 ounces of CS arrived, perfectly prepared a la plancha,
with an accompanying lemon butter sauce that was divine. Although butter is not officially a big part of the Mediterranean diet, frequent readers of the skepcard know that dairy fat does not make you fat or promote heart disease, and is fine (in moderation of course) as part of a heart-healthy diet.
Speaking of lingering bad dietary advice, if you investigate the nutritional content of sheepshead at a site like SELF Nutrition, the old canard that we should be limiting our dietary cholesterol raises its ugly head. Because sheepshead contain significant amounts of cholesterol (presumably from carnivorously munching on shellfish with its scary human-like choppers), the misguided nutritionists at SELF Nutrition and other would-be nutritionistas pronounce it as not optimally healthy.
PS. If you’d really like to get your nerd on about sequential hermaphroditism check out this graphic showing the independent evolution of this feature across different phylogenetic lineages!
I clicked on the one of the numerous links that were provided and based on the appearance of the home page of Dr. Gundry’s website, I feel confident that he is a quack.
Yes, there it is. Red Flag #1: an immediate and aggressive attempt to sell lots of useless supplements.
I didn’t spend a lot of time perusing Gundry’s website, but I read enough to enter him into my contest for America’s Greatest Quack Cardiologist.
Sadly, Dr. Gundry used to be a well-respected cardiac surgeon. (what is it about cardiac surgery that makes so many turn to quackery?)
Gundry’s life story is typical of the physician who has given up actually helping patients with real medicine and resorted to shilling untested snake oil to gullible people.
“I left my former position at California’s Loma Linda University Medical Center, and founded The Center for Restorative Medicine. I have spent the last 14 years studying the human microbiome – and developing the principles of Holobiotics that have since changed the lives of countless men and women.”
Need I mention that “holobiotics” is (?are) not real.
If any readers have more candidates to nominate for the soon-to-be-announced honor of America’s #1 Quack Cardiologist please forward their names to me.
After writing this, I googled “red flag of quackery” images in the foolish hope that I might find a useable image. Lo and behold the image I featured in this post turned up courtesy of sci-ence.org. Here it is in all its glory, courtesy of Maki
The father of the eternal fiancee’ of the skeptical cardiologist (FOEFOSC, let’s call him “Geo”) is a typical 61 year old white male. A year ago his primary care physician informed him that he needed to start taking a statin drug because his cholesterol was high. The note accompanying this recommendation also stated “work harder on diet and exercise to get LDL<130.” No particulars on how to change his current diet and exercise program were provided.
Neither of Geo’s parents and none of his siblings have had heart problems at an early age and Geo is very active without any symptoms. His diet is reasonably free of processed food and added sugar, he is not overweight and his blood pressures are fine. Due to concern about side effects he had read about on the internet and because he doesn’t like taking medications , Geo balked at taking the recommended statin,
Reluctance to start a new and likely life-long drug is understandable especially when combined with a constant stream of internet-based bashing of statins.
My advice was sought and I suggested a few things that would be helpful in making a more informed decision:
As I’ve pointed out before (here), the vast majority of men over the age of 60 move into a 10 year risk category >7.5%, no matter how great their lifestyle is, and Geo was no exception with a risk of 8.4%. His total cholesterol was 249, LDL (bad) 154, HDL (good) 72 and triglycerides 116.
The vascular ultrasound showed below normal carotid thickness and no plaque and his coronary calcium score was 18, putting him at the 63rd percentile. This is slightly higher than average white men his age.
When Geo presented these findings to his PCP, he seemed unaware of the ASCVD risk estimator (recommended by AHA/ACC guidelines first published in 2013), which no longer suggests LDL levels as goals. His PCP also seemed miffed that he had gotten the coronary calcium scan. Geo felt like the PCP’s attitude was “shut up and do what I tell you.”
Geo’s PCP’s approach exemplifies a not-uncommon traditional doctor-patient relationship, but a better approach is shared decision-making (see here). Geo, like many patients, welcomes more information on the risks and benefits of any recommended treatment so that he can participate in deciding the best course of action.
By giving patients more information on the risks, side effects, and benefits of the statin drugs along with a better understanding of their overall risk of heart disease and stroke, we can hopefully move more patients “off the fence” and onto the most appropriate treatment.
Stay tuned to find out what The Skeptical Cardiologist Recommended for Geo.
If you’d like to read the recently published recommendations of the US Preventive Services Task Force on statins for primary prevention of cardiovascular disease see here. Importantly this panel of unbiased experts concluded that statin therapy significantly reduced overall mortality and cardiovascular mortality. In addition, the review found no increased risk of diabetes overall with statin therapy. The only trial that identified an increased risk was using high intensity statin therapy (Crestor (rosuvastatin) >20 mg).
And, since the internet is jammed with people who believe statins robbed them of their brain power, I would advise noting that the writers concluded “These findings are consistent with those from a recent systematic review of randomized trials and observational studies that found no adverse associations of statins with incidence of Alzheimer disease, dementia, or decreased scores on tests of cognitive performance.”
Traffic on The Skeptical Cardiologist doubled from 2015 to 2016 despite a significant drop in output in the middle of the year. WordPress provides its bloggers with statistics on visits and views that are disturbingly addictive. For example, people from 160 different countries viewed my blog in 2016 including one from Reunion, a country with which I was totally unfamiliar. See if you can spot it in this map of EU Oversease Countries and Territories.
After reading about this tropical island in the Indian Ocean, I’m pondering flying there to frolic on its unique beaches and search for the one Reunion inhabitant who clicked on my blog.
I have no idea why but if any of my French speaking/reading readers cares to enlighten me I will be eternally grateful. And if any female Frenchmen read this let me know if Samuel Johnson was correct when he said “A Frenchman must be always talking, whether he knows anything of the matter or not; an Englishman is content to say nothing when he has nothing to say.”
In the spring of 2003 at the age of 72 years, Robert Atkins, the cardiologist and controversial promoter of high fat diets for weight loss, fell on the sidewalk in front of his Atkins Center for Complementary Medicine in Manhattan. He lost his footing on a patch of ice, slipped and banged his head on the pavement. At the time of his fall his book ”Dr. Atkins’ New Diet Revolution” lead the NY times paper-back best seller list.
He was taken to nearby Cornell Medical Center where a clot was evacuated from his brain. Thereafter he lapsed into a coma and he spent 9 days in the ICU, expiring on April 17, 2003.
The cause of death was determined by the New York Medical Examiner to be “blunt injury of head with epidural hematoma.”
An epidural hematoma is a collection of blood between the skull and the tough outer lining of the brain (the dura) which can occur with blunt trauma to the head which results in laceration of the arteries in this area. It is a not uncommon cause of death in trauma . Actress Natasha Richardson (skiing, see below) died from this. Nothing about the manner in which Robert Atkins died would suggest that he was a victim of his own diet any more than Natasha Richardson was.
However, within the year a campaign of misinformation and deception spear-headed by evangelistic vegans would try to paint the picture that Atkins died as a direct result of what they perceived as a horribly dangerous diet.
Michael Bloomberg, then New York major, was quoted as saying
“I don’t believe that bullshit that [Atkins] dropped dead slipping on the sidewalk.”
“The 61-year-old billionaire added that Atkins was “fat” and served “inedible” food at his Hamptons home when Bloomberg visited. The mayor’s inference, of course, was that Atkins was actually felled by his meat-heavy diet, that his arteries were clogged with beef drippings. “
Enter The Vegans
Richard Fleming, a physician promoting prevention of cardiovascular disease through vegetarianism and with close ties to an organization called Physicians Committe for Responsible Medicine (PCRM) sent a letter to the NY Medical Examiner requesting a copy of the full medical examination of Atkins. The NYME office should have only issued copies of this report to physicians involved in the care of Atkins or next of kin but mistakenly complied with this request. Fleming, who would subsequently publish his own low fat diet book, conveniently gave the report to PCRM which is directed by animal rights and vegan physicians.
Neal Barnard, the President of PCRM, in an incredibly unethical move sent the letter to the Wall Street Journal with the hope that the information would destroy the popularity of the Atkins diet, a diet he clearly despises.. Barnard said the group decided to publicize the report because Atkins’ “health history was used to promote his terribly unhealthy eating plan..” The WSJ subsequently published an article summarizing the findings.
To this day, advocates of vegetarianism and low fat diets, distort the findings of Atkins’ Medical Examination in order to depict high fat diets like his as dangerous and portray Atkins as a victim of his own diet.
To scientists and thoughtful, unbiased physicians it is manifestly apparent that you cannot base decisions on what diet plan is healthy or effective for weight loss on the outcome of one patient. It doesn’t matter how famous that one person is or whether he/she originated and meticulously followed the diet. It is a ludicrous concept.
Would you base your decision to engage in running based on the death of Jim Fixx? Fixx did much to popularize the sport of running and the concept of jogging as a source of health benefit and weight loss. He died while jogging, in fact. An autopsy concluded that he died of a massive heart attack and found advanced atherosclerosis (blockage) of the arteries to his heart.
Would you based your decision to engage in a very low fat diet based on how Nathan Pritikin died? Pritikin authored an extremely popular book emphasizing eliminating fat from the diet but developed leukemia and slashed his wrists, committing suicide at the age of 69 years. Would vegetarians accept the premise that their preferred diet results in leukemia or suicidal depression based on Pritikin’s death?
The Distortion of Atkins Death
The NYME report lists Atkins weight at autopsy as 258 pounds. Low-fat zealots seized on this fact as indicating that Atkins was morbidly obese throughout his life. For example, a you-tube video of an audio interview of Atkinas online posted by “plant-based coach” has this obviously photoshopped head of Atkins put on the body of a morbidly obese man. Atkins actually weight around 200 pounds through most of his life and a hospital note on admission showed him weighing 195 pounds. A substantial weight gain of 63 pounds occurred in the 9 days after his admission due to the accumulation of fluid volume and swelling which is not uncommon in the critically ill.
No autopsy was performed on Atkins but the NYME wrote on the document that he had “h/o of MI, CHF, HTN.”
MI is the acronym for a myocardial infarction or heart attack. As far as we can tell without access to full medical records, Atkins never had an MI. He did have a cardiac arrest in 2002. While most cardiac arrests are due to a cardiac arrhythmia secondary to an MI they can also occur in patients who have a cardiomyopathy or weakness in the heart muscle from causes other than MI. In fact, USA Today reported that Stuart Trager, MD, chairman of the Atkins Physicians Council in New York, indicated that Atkins was diagnosed with a cardiomyopathy at the time of his cardiac arrest and that it was not felt to be due to blocked coronary arteries/MI. Cardiomyopathy can be caused by viral infections or nonspecific inflammation of the heart muscle and would have nothing to do with diet.
Trager also stated that Atkins, as a result of the cardiomyopathy, had developed heart failure (CHF) and the pumping ability of his heart (ejection fraction )had dropped to 15 to 20%. While CHF can be due to heart attacks causing heart weakness in Atkins case it appears it was unrelated to fatty blockage of the coronary arteries causing MI and therefore not related in any way to his diet.
What Does Atkins Death Tell Us About His Diet
The information about Atkins death tells us nothing about the effectiveness or dangers of his diet. In one individual it is entirely likely that a genetic predisposition to cancer or heart disease overwhelms whatever beneficial effects the individual’s lifestyle may have had. Thus, we should never rely on the appearance or the longevity of the primary promoter of a diet for the diet’s effectiveness.
The evangelists of low-fat, vegan or vegetarian diets like PCRM have shamelessly promoted misinformation about Atkins death to dismiss high fat diets and promote their own agenda. If their diets are truly superior it should be possible to utilize facts and science to promote them rather than a sensationalistic, distorted focus on the body of one man who slipped on the ice and fell to his death.
Addendum: Earlier versions of this post cited MLB pitcher Brandon McCarthy as a victim of a fast ball to the head causing epicardial hematoma. I was corrected by astute reader Fred N who pointed out that McCarthy is still pitching for the Dodgers and was hit by a line drive (off the bat of Erick Aybar). McCarthy had emergency surgery for the epicardial hematoma in 2012. His diet had nothing to do with the epicardial hematoma.
N.B. Natasha Richardson fell while taking beginner skin lessons at a Canadian Ski resort. According to a release from the resort:
“Natasha Richardson fell in a beginners trail while taking a ski lesson at Station Mont Tremblant,” the statement said. “She was accompanied by an experienced ski instructor who immediately called the ski patrol. She did not show any visible sign of injury but the ski patrol followed strict procedures and brought her back to the bottom of the slope and insisted she should see a doctor.
“As an additional precautionary measure, the ski instructor as well as the ski patrol accompanied Mrs. Richardson to her hotel,” the statement continued. “They again recommended she should be seen by a doctor. The ski instructor stayed with her at her hotel. Approximately an hour after the incident Mrs. Richardson was not feeling good. An ambulance was called and Mrs. Richardson was brought to the Centre Hospitalier Laurentien in Ste-Agathe and was later transferred to Hôpital du Sacre-Coeur.”
A spokesperson for the resort noted Richardson was not wearing a helmet while skiing and didn’t collide with anything when she fell. Thursday, in the wake of her death, Quebec officials said they are considering making helmets mandatory on ski slopes, according to The Associated Press.”
The last time I skied I found myself falling and banging my head an extraordinary amount. If I ever ski again (in contrast to my resistance to bike helmets) I plan to wear a helmet.
In April of 1996, a 28-year old man murdered 35 people in Tasmania primarily utilizing a Colt AR-15 rifle (a lightweight, 5.56×45mm, magazine-fed, air-cooled semi-automatic rifle with a rotating bolt and a direct impingement gas-operation system.)
This event led to public outcry in Australia and bipartisan passage of a comprehensive set of gun regulation laws (the National Firearms Agreement (NFA)).
In the 20 years since the law was put into place (1997-2016), there has not been a single fatal mass shooting in Australia.
In the 17 years prior to the NFA enactment 13 mass fatal shootings (defined as ≥5 victims, not including the perpetrator) occurred in Australia.
licensing of all firearm owners and registration of firearms.
that persons seeking firearm licenses must document a “genuine need,” have no convictions for violent crimes within the past 5 years, have no restraining orders for violence, demonstrate good moral character, and pass a gun safety test.
uniform standards for securing firearms to prevent theft or misuse, record-keeping for fire arms transfers, purchase permits, and minimum waiting periods of 28 days.
I agree with the comments in an accompanying editorial written by Daniel Webster of the John Hopkins School of Public Health, Center for Gun Policy and Research(:gun-regulation.)
Research evidence should inform the way forward to advance the most effective policies to reduce violence. However, research alone will not be enough. Australian citizens, professional organizations, and academic researchers all played productive roles in developing and promoting evidence-informed policies and demanding that their lawmakers adopt measures to prevent the loss of life and terror of gun violence. Citizens in the United States should follow their lead.
N.B. Of the 46 mass shooting since 2004, 14 featured assault rifles, including Newtown, Aurora, Orlando and San Bernardino. Apparently there are 10 million AR-15 type rifles in private hands in the USA and as Vox has pointed out
“the AR-15 is caught in a cycle. The more it’s used in high-profile mass shooting cases, the more people want to ban it. The more people want to ban it, the more AR-15s are sold. And the more AR-15s are sold, the harder it becomes to create a ban that would be able to stop the next tragedy.”
I can only envision still another item on a chart checklist that will have to be recorded in the EHR or already over-worked physicians will have their payments withheld.
The AHA statement suggests that ideally we should be measuring our patients’ fitness by obtaining maximal oxygen consumption (VO2 max) utilizing an expensive and rarely utilized cardiopulmonary exercise test. Failing that we should consider doing a treadmill stress test. Failing that, rather than utilizing my simple question to patients: “How active have you been?”, the statement recommends doctors utilize some sort of formal questionnaire to estimate their patients’ cardiorespiratory fitness (CRF) such as the one at World Fitness Level.
I went online to take this CRF estimator (based on this paper) and I remain skeptical.
The online site and a free smartphone app both ask the following questions:
Country and City
Highest Level of Education
Resting and Maximal Pulse
How often do you exercise?
How long is your workout each time? (over/under 30 minutes)
How hard do you train? (I had to choose between “I go all out”or “Little hard breathing and sweating”)
When you have finished answering the questions you are given an estimate of your fitness age. When I did this online a few days ago and answered truthfully I got the result to the right: I had the fitness of a 41 year old with an estimated VO2 max of 49 ! (interestingly this estimate corresponds exactly with VO2 max derived from a recent stress test I completed.)
I used the app (which unlike the online version did not ask me my waistline measurement) and changed a few parameters:
I increased my resting heart rate or pulse from 60 to 68 beats per minute (BPM)
I increased my maximal heart rate from what I know is 158 BPM to what the app calculated (173 BPM, which makes no sense)
I switched from exercising 2-3 times per week and longer than 30 minutes at “all out” level to the lowest level for all 3 questions.
The change was dramatic and depressing: I went from 39 years old to 67 years old in the bat of an eyelid!
I’ll be trying out this CRF estimator on my patients: assessing whether it adds anything to my usual line of questioning on activity and fitness.
I encourage you to give the CRF estimator a try. Let me know in the comments how you feel it works for you. Does it motivate you to exercise more knowing that, for example, your fitness age is substantially higher than your chronological age?
The AliveCor/Kardia mobile ECG device is a really nifty way to monitor your heart rhythm. Since acquiring the third generation device (which sits within or on my iPhone case and communicates with a smartphone app) I have begun routinely using it on my patients who need a heart rhythm check during office visits. It saves us the time, inconvenience (shirt and bra removal) and expense of a full 12-lead ECG which I would normally use.
In addition, I’ve convinced several dozen of my patients to purchase one of these devices and they are using it regularly to monitor their heart rhythms. Typically, I recommend it to a patient who has had atrial fibrillation (Afib) in the past or who has intermittent spells of palpitations.
Some make daily recordings to verify that they are still in normal rhythm and others only make recordings when symptoms develop.
Once my email invitation request is accepted I can view the ECGs recorded by my patients who have AliveCor devices as I described here.
This monitoring has in many cases taken the place of expensive, obtrusive and clumsy long term event monitors.
In general, it has been very helpful but the device/app makes occasional mistakes which are significant and sometimes for certain patients it does a poor job of making a good recording.
Alivecor Success Stories
One of my patients, a spry ninety-something year young lady makes an AliveCor recording every day, since an episode of Afib 9 months ago.
And when I say every day I mean it literally everyday. It could be because she is compulsive or perhaps she has programmed the AliveCor to remind her. When I log in to the AliveCor site and click on her name I can see these daily recordings:
After a month of normal daily recordings, she suddenly began feeling very light headed and weak with a sensation that her heart was racing.
She grabbed her trusty iPhone and used the AliveCor device attached to it to make a recording of her cardiac rhythm. This time, unlike the dozens of other previous recordings, the device indicated her heart rate was 157 beats per minutes , about twice as fast as usual.
After 5 hours her symptoms abated and by the time of her next recording she had gone back to the normal rhythm.
She made two other recordings during the time she felt bad and they both confirmed Afib at rates of 140 to 150 beats per minute.
In this case, the device definitely alerted her to a marked and dramatic increase in heart rate but was not capable of identifying this as Afib In my experience with several hundred recordings, the device accurately identifies atrial fibrillation about 80% of the time. On rare occasions (see here) it has misidentified normal rhythm with extra beats as atrial fibrillation
AliveCor/kardia users have the option of having their recordings interpreted for a fee by a cardiologist or a technician.
My patients can alert me of a recording and I can go online and read the ECG myself and then contact the patient to inform them of my interpration of their heart rhythm and my recommendations.
Another patient made the recording below:Although she is at high risk of having a stroke during the times she is in Afib, we had been holding the blood thinner I had started her on because of bleeding from her mouth. I had instructed her to take daily recordings of her rhythm with the AliveCor until she was seen by her dentist to evaluate the bleeding.
In this case, the AliveCor performed appropriately, identifying correctly the presence of Afib which was the cause of her nocturnal symptoms.
A young woman emailed me that her AliveCor device on several occasions has identified her cardiac rhythm during times of a feeling of heart racing and palpitations as “possible atrial fibrillation.” When she sent the recordings in to AliveCor to have a paid interpretation, however, the recordings were interpreted as sinus tachycardia with extra beats. Indeed , upon my review her rhythm was not Afib. Clearly, when the device misidentifies Afib, this has the potential for creating unnecessary anxiety.
It is not uncommon for a full, 12-lead ECG done in the hospital or doctor’s office by complex computer algorithms to misinterpret normal rhythm as Afib so I’m not surprised that this happens with AliveCor using a single lead recorded from the fingers.
The young woman was advised by AliveCor to try a few things such as using the device in airplane mode, sitting still and wetting her fingers which did not help. She was sent a new device and the problem persisted. She finds that putting the device on her chest gives a better chance of success.
She also runs into a problem I see frequently which is a totally normal recording labeled by the device as “unclassified.”
In this example, although I can clearly see the p-waves indicating normal sinus rhythm, the voltage is too low for the device to recognize.
Send Me Your AliveCor Problems and Solutions
I’m interested in collecting more AliveCor/Kardia success and failure stories so please post yours in the comments or email me directly at DRP@theskeptical cardiologist.com.
In addition, I’m interested in any tips AliveCor users have to enhance the success of their recordings: What techniques do you use to make the signal strength and recording better? What situations have you found that tend to worsen the signal strength and recording quality?
Still Unclassified Yours,
P.S. Tomorrow is Cyber Monday and I note that Kardia is running a “Black Friday” special through 11/28, offering the device at 25% off.
P.P.S. Kardia, You should change the statement on your website, “90% of strokes are preventable if you catch the symptoms early.” makes no sense. I think you mean that some strokes are preventable (I have no idea where the 90% figure come from) if one can detect Afib by utilizing a monitoring device to assess symptoms such as palpitations or irregular heart beat.
As part of the Dr. P Heart Nuts Project, the skeptical cardiologist has been trying to determine what constitutes the best and most cardioprotective almonds.
Previously I decided that i would not be consuming or handing out almonds pasteurized with propylene oxide (PPO). PPO was used as a racing fuel before being banned and is used in thermobaric weapons (one of my least favorite weapons of mass destruction) and in making polyurethane plastics and is a recognized carcinogen.
Since 2004 almost all “raw” almonds consumed in the US have been treated with PPO.
Cardioprotective Almonds: Best Raw or Roasted?
There are two issues with roasting: are we destroying good nutrients and are we creating bad chemicals?
Effects of Roasting on Good Nutrients
The cardioprotective component of nuts and almonds is presumed related to phytochemicals, especially phenolics and flavonoids which may act as antioxidants. But truly we don’t know with any certainty which of the many potentially beneficial components-minerals, vitamins, fatty acids, proteins are helpful. And we have little understanding of how roasting, steaming, soaking, fermenting, germinating, or fumigating affects the cardioprotective components.
In terms of measurable important macronutrients, vitamins and minerals there is no significant difference between roasted and raw nuts.
One study compared consuming roasted versus raw hazelnuts on various cardiovascular parameters. Compared with baseline, consuming both forms of hazelnuts significantly improved HDL-cholesterol and apolipoprotein A1 concentrations, total-C/HDL-C ratio, and systolic blood pressure. These changes would be expected to result in improved cardiovascular outomes.
One argument I hear frequently from patients worried about weight gain is that nuts are very energy dense and therefore will contribute to weight gain if added to the diet or consumed as a snack.
In the roasted versus raw hazelnut study:
However, no evidence for weight gain was observed with the consumption of either raw or dry roasted, lightly salted hazelnuts in the present study, and in fact, small reductions in weight were observed. Results of the present study further add to previous research, which suggests that regular nut consumption results in either no weight gain or less weight gain than predicted This may be explained by dietary compensation, inefficient energy absorption, and an increase in metabolic rate.
Thus, neither roasted nor raw nuts contribute to weight gain.
I particular like one line from the conclusions of this study:
both forms of nuts are resistant to monotony
Really! That is tremendously reassuring because I have always worried about my nuts getting bored.
Bottom line: Probably little change in the good components of nuts and almonds with roasting.
Effects of Roasting Almonds on Increasing Bad Chemicals
About a third of almonds and nuts are consumed in roasted form because a majority of people prefer the taste created by the Maillard reaction during roasting. Almonds can be roasted at home and the typical recommendation is an oven temperature of 350 degrees which corresponds to 177 degrees Celsius.
An analysis from the Winnipeg Health Authority found that roasting at temperatures higher than 140 degrees Celsius has some potentially worrisome consequences:
-High heat used during the processing of nuts has the potential to develop lipid oxidation products, which include trans fatty acids. Trans fatty acids, while not present in raw nuts, were found to be significantly higher in roasted pistachios, peanuts, and almonds (0.5-0.9g/100g).
-Trans fat is known to increase LDL cholesterol and decrease HDL cholesterol, leading to increased cardiovascular disease risk.
-While roasting temperature was found to substantially increase lipid oxidation, roasting time had less of an effect on lipid oxidation. It is therefore recommended to roast nuts at a moderate temperature (130-150°C), for a longer period of time, rather than roasting at high heat for a shorter period of time (reference here)
-Acrylamide has been identified as a probable carcinogen to humans. The amount of free aspargine in almonds makes them more susceptible to the Maillard reaction, which results in acrylamide formation. Time and temperature are known determinants of acrylamide formation in foods. Hence, darkly roasted almonds were found to have a much higher amount of acrylamide than lightly roasted almonds. The amount of acrylamide that is initially formed after processing was found to decrease over time. Acrylamide content of almonds therefore differs widely depending on roasting time and temperature, as well as length of time after processing.
-It was observed that almonds processed under roasting temperatures of 140-180°C led to the accelerated production of acrylamide. It is therefore recommended to roast almonds below 140°C
Almonds of European origin contained significantly less free asparagine and formed significantly less acrylamide during roasting as compared to the almonds from the U.S. Roasted hazelnuts contained very little acrylamide because of the low content of free asparagine in the raw nut.).
Bottom Line: Roasting almonds has the potential for creating some bad chemicals which might negate their beneficial effects.
I asked Whole Foods (my typical almond source) about the roasting process for their roasted almonds and they responded thusly:
“PPO and chemical methods of pasteurization are against our Quality Standards. Our almonds are pasteurized with steam. Our almonds are roasted with canola oil at 148 degrees (celsius).”
Yikes! Canola oil! 148 degrees! (When I asked Whole Foods did they really mean 148 degrees Celsius, the response was , no, I meant 148 degrees Fahrenheit. The skeptical cardiologist wonders.)
It appears even Whole Foods roasted almonds have the potential for containing harmful acrylamides and trans-fats therefore when the skeptical cardiologist starts handing out packets of his cardioprotective nuts the almonds will be raw and they will be from Spain just like the almonds consumed in the landmark PREDIMED study that established their heart benefits.
Happy Thanksgiving!I hope you are able to stay resistant to monotony during this festive season.
Speaking of resisting monotony, did you know this about thermobaric weapons?
“The [blast] kill mechanism against living targets is unique–and unpleasant…. What kills is the pressure wave, and more importantly, the subsequent rarefaction [vacuum], which ruptures the lungs…. If the fuel deflagrates but does not detonate, victims will be severely burned and will probably also inhale the burning fuel. Since the most common FAE fuels, ethylene oxide and propylene oxide, are highly toxic, undetonated FAE should prove as lethal to personnel caught within the cloud as most chemical agents.”