I've done more than most to mitigate the heart beat problem.
Did some serious LR shooting today and heart beat wasn't a problem.
Here's what worked for me
gall bladder removal
Chunk removed from kidney. (They screw'd up. Took it from the right kidney which minimized making more room for the heart.
Plus I dropped from 230# to 195.
Hey ya gotta do whatcha gotta do!