Fig. 1From: Right-sided approach to left bundle branch area pacing combined with atrioventricular node ablation in a patient with persistent left superior vena cava and left bundle branch block: a case reportECG tracings before, during, and after the procedure. A A 12-lead ECG tracing at admission showing atypical atrial flutter with left bundle branch block (LBBB) morphology. QRS duration is 150 ms. B A 12-lead ECG recorded after the implantation showing paced rhythm (VVI 80 bpm) with correction of LBBB. A distinctive notch in the nadir of the QS complex in V1 can be observed representing left bundle branch area pacing (LBBAP). C Intraoperative tracing of precordial leads with intracardiac electrogram in green after trans-septal screwing of the LBBAP lead. With time interval from stimulus to peak of R wave in lead V6 of 80 ms, isoelectric interval on intracardiac electrogram, and the V6-V1 interpeak interval of 50 ms LBB capture was confirmedBack to article page