AV dissociation occurs when P waves (represents atrial depolarization ... Slurred or notched downstroke of the S wave in V1 or V2 favors VT. Duration of onset of the QRS complex to peak of ...
The six precordial leads are called leads V1, V2, V3, V4, V5 and V6 ... indicates a specific electrical event. The waves on an ECG include the P wave, Q wave, R wave, S wave, T wave and U wave.