You would have to have an old heart attack or have cardiomyopathy for you to be at any risk for developing ventricular fibrillation associated with PVC's. Thus, you should not worry about ventricular fibrillation. Otherwise, there should be no problem with exercising. Also, I suggest that you focus your attention elsewhere so that you can better cope with PVC's when they do occur. I hope you find this information useful.
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