Fig. 1.

Twelve-lead ECG and intracardiac electrogram. (A) Twelve-lead ECG on the 1st day of admission showed an escape distal rhythm at 44 beats/min with wide QRS complex, of 0.12 sec. No P wave was found in ECG. QTc interval was prolonged to 0.55 sec. (B) Recording obtained during EPS after implantation of ICD with VVI pacemaker function. There was no electrical activity on atrial and CS electrograms. ECG, electrocardiogram; ICD, implantable cardioverter-defibrillator; HRA, high right atrium, CS, coronary sinus.