The apple watch 4 seems to be promising with the new edge to edge display and the ECG.
Since I hate marketing hyperbole, I would like to clarify certain claims:
Apple watch’s ECG is technically just a rhythm strip, not a ECG. At most it can be classified as 1 lead ECG ( Normal ECG has 12 leads). It monitors the heart pulse and if there is irregularity, it reports it. The irregularity can be due to anxiety and emotion like watching India lose match or seeing petrol price at petrol bunk!
Thus it need not be due to genuine AFib (Atrial Fibrillation).
In fact, FDA clearance certificate clearly states the following:
The feature analyzes pulse rate data to identify episodes of irregular heart rhythms suggestive of atrial fibrillation . It is not intended to provide a notification on every episode of irregular rhythm suggestive of AFib and the absence of a notification is not intended to indicate no disease process is present; rather the feature is intended to opportunistically surface a notification of possible AFib when sufficient data are available for analysis.
In other words,
notification of AFib doesn’t mean you have AFib and absence of AFib notification doesn’t mean you don’t have AFib!!
It is also worth noting that the feature will be
available only in US by this month end. There is no news of availability of this feature for other countries.
Lastly, this is
not the first wearable AFib monitor to be cleared by FDA as claimed by Apple
. Alivecor’s Kardia Band was cleared years ago by FDA and has been selling for years now. In fact, it is a popular Apple watch accessory.