Some variations of right bundle branch blocks can occur ... thereby resulting in a RBBB QRS morphology. This may also occur in the setting of an Ashman beat, a premature atrial contraction ...
QRS duration greater than 120 milliseconds Absence of Q wave in leads I, V5 and V6 Monomorphic R wave in I, V5 and V6 ST and T wave displacement opposite to the major deflection of the QRS complex ...
Differential diagnosis with arrhythmogenic right ventricular cardiomyopathy (ARVC) constitutes a frequent problem, especially in athletes showing ventricular arrhythmias with left bundle branch block ...