What are ECG findings of biatrial enlargement?,”LAE and RAE criterias must be met:Lead II: Bifid P wave with amplitude ≥ 2.5mm and duration ≥ 120 msLead V1: biphasic P waves with initial positive deflection ≥ 1.5mm AND terminal negative deflection ≥ 1mm deep
≥ 40 ms duration”