CONDITION AND ITS EKG FEATURESEKG Cor pulmonale P wave Limb leads Vertical axis P > 3 mm in lead II or III Precordial leads Negative P in lead V1 QRS morphology Limb leads Right axis deviation S > R in lead I Precordial leads R in V5 - V6 R in V2 Lead V1 rs, Rs, or rS Orthogonal leads R in lead X Tall R wave in lead II Variable T wave
