P-wave duration was measured from the conclusion of the TP segment (P-wave onset) to return to baseline (PR interval). For biphasic P waves, both positive and negative deflections from baseline ...

the P-P interval (the time between consecutive P waves) is the same throughout the ECG. Also, the heart rate (how fast the ...

[29] In another study, a prolonged P wave interval of >120 ms was associated with higher risk of stroke; [40] atrial late potentials (using signal-averaged ECG) were the strongest predictor ...