Practice Level 5 Case 21: A 56 Year-OId Man in the Arrhythmia Clinic History Diagnosis History A 56-year-old man is in the arrhythmia clinic: Diagnosis Electronic ventricular pacemaker, VVI modeThe underlying rhythm is sinus bradycardia, 50/min, with first degree AV blockPaced ventricular rhythm, 66/min, with occasional fusion complexes and AV capture ECG ID: E623 Bookmark Please login to bookmark Username or Email Address Password Remember Me No account yet? Register