No, no, no, no, no. This is so fantastically wrong. I can't believe this got approval.
You cannot do an EKG/ECG from one lead. It's not an EKG.
Second, I can't think of a way you would be able to determine rhythm from one lead. The physics aren't there. You need at least 3 leads just to do telemetry, which is what you see when someone is on a heart monitor at the hospital. It might be able to determine whether a rate is irregular, but that's about it.
This has fraud written all over it. I wouldn't rely on a watch to determine heart rhythm. Period.
To the moderators, I would remove what appears to be an endorsement of a product that basically has no possibility of actually working and has potential to cause harm.
Sincerely,
D. Sacco, MD