Brad, firstly, your doctor seems to be an idiot.
Yes, viagra and the others increase blood flow, but to the extremities only, your heart and organs actually suffer from a loss of blood pressure, which you already have, so these drugs lower it further, putting you at risk of heart attack.
Change your doctor. Secondly, I too suffer from these things that you call the heart stopping for a while and restarting with a jolt, and it usually happens after heavy drinking, for me.
I too, suffer from low blood pressure, and therefore, I stay well away from the wee wee enhancers, it is not good for those of us with low BP.