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, ...

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.

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 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.