Less than 5% of patients developed first-degree AV block or intraventricular conduction defect and the occurrence of side effects was not related to dose. In our study, ...

Nearly 90% had atrial fibrillation at baseline, 5% had first-degree AV block, 33% had right bundle branch block (RBBB), and 7% had LBBB, left anterior fascicular block (LAFB), or left posterior ...

The diagnosis is normal sinus rhythm, atrial bigeminy, first-degree atrioventricular (AV) block (prolonged AV conduction), and right bundle branch block (RBBB). (Enlarge Image) Figure 2.

The computer read shows normal sinus rhythm (80 beast/min), first degree atrioventricular (AV) block, premature atrial contractions (PACs), and right bundle branch block (RBBB) (Figure 1). Figure 1.