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Fig. 4 | International Journal of Arrhythmia

Fig. 4

From: Left bundle branch area pacing with stylet-driven pacing leads: implantation technique

Fig. 4

Examples of intracardiac electrograms during the LBBAP. After initial penetration with 10 rapid rotations of the whole lead body, unipolar pacing showed the LBBB in V1 (A, red round). High-output pacing (3–5 V) shows nonselective capture, and lower-output pacing (2.5 V) reveals a transition from nonselective capture to LV myocardial capture (B). After further advancement of the lead tip by one or two rotations, a transition from nonselective LBB capture (at 2.5 V) to selective LBB capture (at 2.0 V) is observed (C). The LBB potential is also shown (D, red arrow). LBBAP Left bundle branch area pacing, LBB left bundle branch, Stim-LVAT stimulus to left ventricular activation time

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