Fig. 1From: Transvenous endocardial pacing with SelectSecure™ 3830 lead in pediatric patients: case series of two infants and a literature reviewUpon admission ECG and pacing ECG. A Admission ECG: sinus rhythm, second-degree AVB (type II), ventricular rate was 67 bpm. B Postoperative pacing ECG: QRS duration was 134 msBack to article page