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).