Positive P waves in inferior leads (II, III, and aVF) and a negative P wave in lead aVR indicated high atrial origins (high CT, superior PVs, and RAA, defined as Area A), with a sensitivity of 95% ...

[10] They reported that a positive P wave in lead V1 was associated with 93% sensitivity and 88% specificity for tachycardia arising from the LA. A positive or positive-negative (biphasic ...