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 ...

Background Regular intensive physical activity is associated with non-pathological changes in cardiac morphology. Differential diagnosis with arrhythmogenic right ventricular cardiomyopathy (ARVC) ...