PMC10176781_01
This figure shows 12-lead electrocardiograms and intracardiac electrograms from the His
bundle pacing (HBP) lead at baseline and from non-selective HBP (right ventricular
septum + His capture) to selective HBP (His capture only). Note His potential at
baseline on the pacing lead (arrow).
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The threshold of selective HBP was 1.1 V@1 ms; the impedance was 561 ohms, the sensing was 5.3 mv, and the QRS duration (QRSd) was 112 ms (Figure 1).
This figure shows 12-lead electrocardiograms and intracardiac electrograms from the
left bundle branch pacing (LBBP) lead at baseline and from non-selective LBBP (left
ventricular septum + LBB capture) to left ventricular septal pacing (left ventricular
septum capture only). Note His and left bundle branch (LBB) potentials at baseline,
retrograde His (RH) potential on HBP lead.
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The lead advancement was stopped until the left bundle branch (LBB) potential was observed. The threshold of LBBP was 0.8 V@0.4 ms; the impedance was 542 ohms, the sensing was 12.7 mv, and the stimulus-QRSend duration (s-QRSend) was 144 ms (Figure 2).
This figure shows the atrioventricular node ablation site and the distance to the tip
of His bundle pacing lead (arrow) using fluoroscopic images in the right anterior
oblique projection 30 .
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AVNA procedure was completed. AVNA was performed immediately after the successful implantation of the pacemaker (Figure 3).