Maybe I'm a sucker, but I have enough confidence in my doctor that I do whatever he says, within reason. I have something called Bradycardia that he knows about. My normal heart rate is from 48-52. It has been for as long as I can remember. Also a very irregular heart beat, sometimes it stops for 8 or 10 seconds and them restarts with a great thumping. He has calmed it a lot telling me someday I too, will have something like what you are looking at. I will not hesitate to do what is called for since everyone knows more about it than me.
I am sure you will do what is right, trusting you doctor and your God.