@suzy0509
With a pacemaker set to correct number you should not have the drop of what you explained. My pacemaker is set for 79 bpm and thus I do not have any pulse rates below 70.

I started with a LBBB but progressed into cardiomyopathy with heart failure. I have both a Pacemaker and Defibrator device.

If your pulse is dropping like that is your pacemaker set right to prevent that? Talk to your PACE Clinic, EP, cardiologist if you are having the low pulse rates and asked about is your pacemaker set o a specific rate or just to kick in when gets low.