Fig. 2
From: Hypertrophic cardiomyopathy with paroxysmal atrial fibrillation misdiagnosed as WPW syndrome
a After DC cardioversion, marked sinus bradycardia with short PR interval (86 ms) and delta wave was observed. The QRS axis and morphology was not changed. b The ablation catheter was positioned on the His bundle (red dot in Fig. 3). Baseline AH interval was 53 ms and HV interval was 35 ms. A: atrium, ABL: ablation catheter (d: distal, p: proximal), CS: coronary sinus (9, 10: proximal site, 1, 2: distal site), H and HIS: His bundle, RV: right ventricle, V: ventricle