The Doctor always answers his questions with an increased risk for cardiovascular events in the recovery phase of exercise if you have pvc's. My cardiologist told me that it's just the adrenaline pumping through the heart, and if you are predisposed to pvc's it makes no difference. I guess I'm curious because is it with people that already have heart disease, and have pvc's? If anyone can answer that I would appreciate it. I'm going to have my doctor do another thallium treadmill to make sure everything is ok, as my pvc's have come back again after being gone for a year. Last year's treadmill was ok, but still need that reassurance. My holter monitor showed benign pvc's again. Just don't know why they have returned after being gone for a year. I know I'm driving my doctor and cardiologist nuts, but they are not the ones that feel them. Thanks for listening.