Figure Legends:
Figure 1. An example of successful left bundle area (LBA) pacing lead implant performed at Ascension Borgess Hospital in a patient who failed conventional coronary sinus lead implant.
Figure 2. Fluoroscope views of LBA lead and coronary sinus (CS) lead positions. 2A: right anterior oblique view. 2B: left anterior oblique view.
Figure 3. Marked QRS shortening and decreased ST deviation by simultaneous pacing of the LBA and CS leads (pole 3 to pole 4). 3A: standard biventricular pacing produced minimal shorting of the QRS. 3C: LBA pacing failed to correct the baseline LBBBB or shorten the QRS. 3D: Simultaneous LBA and CS pacing led to improved electrical resynchronization and QRS shortening of 46ms (from 176ms to 130ms).