Are pvcs, bradycardia, and low BP related?

Usually not. But it's possible. Extreme bradycardia (hr <40) can precipitate pvcs and, that aside, extreme bradycardia can cause low bp. You should be fully evaluated.
Yes. Bradycardia and low BP indicate a nervous system imbalance. Anx 3.0 can assess the function of the nervous system like no other test. Pvc's are an escape rhythm of the heart from low rate (bradycardia).