Whoops!

One never knows what is just around the corner, does one.

I don't know a thing about pacemakers except I know a couple of folks who use them (one is a 78 year old member of my singing group, who travels the worlds, etc., with his pacemaker, and does GREAT).

Don't they have ones that respond to your need for more circulation as you exercise more - IOW, increase the heart rate as needed?

Personally, when I had the 24/7 atrial fibrillation for one year, I noticed the 30% drop in blood flow and corresponding energy loss, and that was my prime motivator for havng my heart repair (called an "ablation.")

EDIT:

I'm not clear as to whether or not the pacemaker is only for increasing the resting heart rate, or is it for all heart rates?