I am 47 yr old male and have been having pac's and pvc's for several years. About 5 yrs ago saw cardiologist and had ultrasound, echo and stress test as well as 3 weeks of continous heart monitoring device. Told all was fine and no sign of heart trouble. Have been suffering from anxiety for over 30 yrs. Take medication (xanax and paxil) for same. A few months ago, skipped heart beats got really bad and I went to ER. Had EKG, chest x-ray, and visit from cardiologists. Results were anxiety and palpitations. Visited cardiologist and had another echo and stress test (no ultrsound this time) and 24 hr holter monitor. He said all was okay. Heart is sound and PAC's and PVC's are benign. What concerned me is that he said he did not want to put me on beta blocker because holter monitor showed that, at times, I have a slow heart rate and the medication would make it even slower. I have noticed at times my heart rate is about 48 to 54 bpm. This is while resting or doing very light activity. This has me concerned. I really don't exercise regularly (fear of dropping dead due to the heart issue). Is this heart rate safe and normal?