CONDITION AND ITS EKG FEATURESEKG LVH diastolic overload P-wave abnormality of left atrial enlargement (LAE) Tall, peaked T-waves in leads I, aVL, V5, and V6 Increased QRS duration Instrinsicoid deflection > .09 sec. Deep Q-waves in leads I, aVL, V5, and V6 Voltage Criteria Limb leads Lead I: R >15 mm or R >18 mm with left axis deviation (LAD) Lead aVL: R >12 mm or R >16 mm with LAD Lead II or III: R > 25 mm Precordial leads V5 > 26 mm Sum of S wave in V2 and R wave in V5 > 36 mm V6 > V5 Orthogonal leads Transverse plane mean QRS vector > 20 Frontal plane mean QRS vector > 25
