Extended Data Fig. 3: Morphological differences between Apple watch and Lead 1 from 12 Lead.
From: Prospective evaluation of smartwatch-enabled detection of left ventricular dysfunction
12 Lead ECG recording versus post-processing Apple Watch ECG. Significant high frequency signal loss resulted in visual loss of some characteristics present on the standard 12-lead ECG such as pacing spikes that were absent in the Apple watch ECG.
