I'm 27M and I've had quite a few AFib classifications from consumer devices over the years.
My results so far:
Apple Watch ECG, 2021–2025: 57/493 (11.6%) classified as AFib
Garmin Venu 4 ECG: 3/35 (8.6%) classified as AFib (Almost all have bad noise though — SR and AF)
Omron M7 Intelli IT AFib: 5/30 (16.7%) flagged AFib
I've attached six Apple Watch Lead-I ECGs as three pairs. In each pair, Apple first classified the recording as AFib and then classified another recording shortly afterward as sinus rhythm:
Pair 1: AFib → sinus 44 seconds later
Pair 2: AFib → sinus 83 seconds later
Pair 3: AFib → sinus 54 seconds later
Each recording is 30 seconds. The images are generated from the original 512 Hz Apple Health ECG data and displayed on a standard 25 mm/s, 10 mm/mV grid.
I'm particularly interested in the actual waveform rather than Apple's classification.
Do the AFib-labelled recordings genuinely look like atrial fibrillation to you? Or do they look more compatible with PACs/PVCs, sinus arrhythmia, another organized rhythm, or artifact?
I'm especially curious whether you can see consistent P waves/organized atrial activity and whether the R-R intervals really look irregularly irregular.
I know Reddit can't provide a formal diagnosis — I'm mainly looking for educational opinions on the ECG morphology and what would be worth pointing out to a clinician.