AliveCor's Mobile ECG With Kardia Pro Is Eliminating Any Need For Short or Long Term Cadiac Monitors For Most of My Afib patients: A Tale of Four Cardioversions

I described in detail in March (see here) my early experience in utilizing AliveCor’s KardiaMobile ECG  device in conjunction with their Kardia Pro cloud service to monitor my patient’s with atrial fibrillation (afib). Since that post the majority of my new afib patients have acquired the Kardia device and use it regularly to help us monitor their afib.
This capability has revolutionized my management of atrial fibrillation. In those patients who choose to use AliveCor there is really no need for long-term monitors (Holter monitors, Zio patches, cardiac event monitors) and no need for patients to come to the office to get an ECG when they feel they have gone into afib.
When one of my Kardia Pro patients calls with symptoms or concern of afib, I quickly pull up their chart at and review their recordings to determine if they are in or out of rhythm. Most treatment decisions can then be handled over the phone without the need for ordering a monitor or an emergency room or office visit.
One 24 hour period will suffice to show how important KardiaPro is now to my management of my patients with afib

A Day In The Afib Life

Tuesdays I spend the day working in the heart station at my hospital. Typically, on these days I will supervise stress tests, read ECGs and echocardiograms, perform TEES and electrical cardioversions. On a recent Tuesday I had 3 patients scheduled for cardioversion of their atrial fibrillation.
The day before one of these patients called indicating that he suspected he had reverted back to normal rhythm (NSR) based on his Kardia readings. He had had a prior cardioversion after which we know (thanks to daily Kardia recordings) he reverted to afib in 5 days. Subsequently we had started him on flecainide, a drug for maintenance of NSR and scheduled him for the cardioversion.
Not uncommonly after starting flecainide patients will convert to NSR but if they don’t we  proceed to an electrical cardioversion.
I logged into KardiaPro and reviewed his dashboard and sure enough his last two ECGs showed sinus rhythm. I congratulated him on this and we canceled his cardioversion for the next day, saving the lab the time and expense of a cancellation the day of the procedure. The patient avoided much stress, time and inconvenience.

Screen Shot 2018-10-13 at 7.27.49 AM
ECG recordings showing the patient had transitioned from afib (bottom two panels) to NSR (top two panels) after starting flecainide.

It is important to note that in this patient there was no great jump in heart rate with afib compared to NSR. For many patients the rate is much higher with the development of afib and this is often detected by non ECG wearable monitors (like an Apple Watch.)  But for patients like this one, an ECG is the only way to know what the rhythm is.

A second patient with afib who had elected not to acquire an AliveCor ECG device showed up for his cardioversion on Tuesday and after evaluating his rhythm it was clear he had spontaneously reverted back to NSR.  Prior to my adoption of KardiaPro this was a common and scenario.

The third scheduled cardioversion of the day showed up in afib and we successfully cardioverted him back to NSR. I had not addressed utilizing AliveCor with him. Prior to the procedure he asked me about likely outcomes.
My standard response to this question is that we have a 99.9% success rate in converting patients back to NSR at the time of the cardioversion. However, I can’t predict how long you will stay in NSR after the cardioversion. NSR could last for 5 days or it could last for 5 years. Adding medications like flecainide or amiodarone can significantly reduce the risk of afib recurrence after cardioversion.
At this point he asked me “How do I know if I am in afib?” Whereas many afib patients immediately feel bad and are aware that they have gone out of rhythm, this man like many others was not aware.
Prior to AliveCor my answer would have been to check the pulse daily or look for evidence of high or irregular heart rates on BP monitors or fitness wearables. This scenario provided a wonderful opportunity to test the AliveCor’s accuracy at detecting AF in him. I pulled out my trusty AliveCor mobile ECG and prior to the cardioversion we made the recording below
After the cardioversion we repeated the Alivecor recording and the rhythm (AliveCor’s interpretation) had changed from afib  to NSR.
Needless to say, this patient purchased a Kardia device the next day and since the cardioversion he’s made a daily recording which has confirmed NSR. I just logged into Kardia Pro and sure enough he made a recording last night and it showed NSR.

Later in the week I received a call from a patient I had electrically cardioverted a few days earlier. His Kardia device had detected that he had gone back into afib.
I logged into my Mac and saw his KardiaPro chart below.
Kardia Pro displays green dots corresponding to NSR and orange triangles corresponding to afib with 100% accuracy in this patient.

With perfect precision KardiaPro had verified NSR after the cardioversion lasting for 36 hours. For some reason after dinner the day after the cardioversion, the patient had  reverted back to afib. This knowledge greatly facilitates subsequent treatment and eliminates the need for in office ECGs and long term monitors.

Utilization of the Kardia device with the Kardia Pro monitoring service has proved for me to b a remarkable improvement in the management of patients with afib. Managing non Kardia afib patients feels like navigating a forest with a blindfold.
The improvement is so impressive that I find myself exclaiming to my assistant, Jenny, several times a week “How do other cardiologists intelligently care for afibbers without AliveCor?”
I have a few patients who balk at the 15$ per month charge for Kardia Pro and ask why the device and this monthly charge aren’t covered by insurance or Medicare. Given the dramatic reduction that I have noticed in my use of long-term monitors  as well as  office and ER visits in this population, CMS and third-party insurers would be wise to explore Kardia monitoring as a more cost-effective way of monitoring afib patients.
antifibrillatorily Yours
N.B. I realize this post appears to be an unmitigated enthusiastic endorsement of a commercial product which is quite uncharacteristic for the skeptical cardiologist.
One might wonder if the skepcard is somehow biased or compensated for his endorsement of Kardia.
In all honesty, this sprung from my love of the device’s improvement in my afib management and I have received no payment, monetary or otherwise from AliveCor and I own none of their stock (and I’m not even sure if it is on the stock market.)


18 thoughts on “AliveCor's Mobile ECG With Kardia Pro Is Eliminating Any Need For Short or Long Term Cadiac Monitors For Most of My Afib patients: A Tale of Four Cardioversions”

    • Pat,
      I answered a similar question, basically about other rhythm diagnoses as follows
      It’s a (usually) high quality single ECG so all of these nasty rhythms can be recorded and diagnosed by a well-trained cardiologist. Computer diagnosis of these less common rhythms is often inaccurate, however, off 12 lead ECGs, so no matter “deep” the AI is in the app it may struggle with accurate interpretation.
      The most common SVT, (AV nodal re-entry tachycardia) I would think the app algorithm could diagnoses with reasonable accuracy. However, again some SVTs are tricky even with 12 leads to diagnose and sometimes atrial flutter with 2:1 block mimics an SVT. The last thing Kardia wants is the app diagnosing SVT when it is really atrial flutter.

  1. I am a patient of Dr. P. I have been using the AliveCor for 4 years now every since Dr. P suggested it to me to know when I am in afib. I don’t usually feel when I go into afib. I have an Fitbit Ionic watch which reads my pulse rate at all times. I keep track of my pulse rate on it. When my pulse rate goes up and is erratic, I do an AliveCor reading and send it to Dr. P. He then knows when every I go into afib and when I go out of afib. I can’t say enough how this device has made my life easier and less stressed when I go into afib.

  2. This has been about atrial fibrillation, but there’s a nasty kaleidoscope of wrong rhythms out there.
    Will the technology see atrial flutter?
    Will it see a resting atrial rate of 230 communicated 1 to 1 to the ventricles? (My most recent issue.)
    Will it count PVCs? PACs?

    • It’s a (usually) high quality single ECG so all of these nasty rhythms can be recorded and diagnosed by a well-trained cardiologist. Computer diagnosis of these less common rhythms is often inaccurate, however, off 12 lead ECGs, so no matter “deep” the AI is in the app it may struggle with accurate interpretation.
      As far as PVCs and PACS, I am told that this capability is being actively investigated.

  3. I meet my new EP tomorrow and I’m going to share this with him. Successful cardioversion followed by daily Flecainide has kept me in normal rhythm but I do slip in and out for brief moments (per my pacemaker readout). There are times when my heart is feeling jumpy and checking with my iPhone app shows difficulty pinning down my heart rate…I can see the squiggle in real time, but it’s just a heart rate monitor and really not suited to determine aFib. Thanks for this.

  4. Hi!
    Really appreciate all the medical and heart related information on your blog.
    I have the cardia band. and use it often to detect possible afib.
    Do I need to get alivecor mobile ecg with kardia pro as well?

    • You should be able to utilize Kardia Pro with Kardia Band just as you do with the separate Kardia Mobile ECG device, they use the same app.
      For either you will need a physician that is willing to review your tracings and has registered with AliveCor through the Kardia Pro service.

  5. I purchased Kardio Band but unfortunately clues on how to use it and Kardio band will not let me return it. How do I use it. My PC doesn’t know either:(

  6. Thanks to my series 3 Apple watch and Kardia band, with 2 afib episodes in the past 2 weeks, I was able to self medicate with 200 mg of flecainide to achieve NSR. I had very noticeable symptoms in both cases with ‘possible afib’ reported by Kardia. I saved myself 2 unnecessary, middle of the night, ER trips though I’ll probably have to stay on flecainide for some time now to stay in NSR. I had been off the antiarrhythmic prior to each episode.

  7. As a patient with initially uncontrolled afib and afluttter, I know I have saved myself and the system time, money, and valuable resources by using my Kardia band in the past year. No unnecessary ER , fewer office visits, and a more relaxed patient as well. Wish all EPs used it. Just a study of comparison cost and time would be an eye opener !

    • Thanks for the feedback. I find it remarkable that none of my EP colleagues have embraced this personalized technology especially since they see patients of mine who have clearly benefited from it.


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