burning, occassional sob only during exercise. I have exercised 4-5 days wk for 2 years+. In Jan had thallium stress test
, ecg, echo, ekg, holtor, ekg and ct scan to rule out stomach. Stress test stopped after 9 min. due to reaching max heart rate of 151. Bp was normal. Holtor showed heart rate at 195, 20 minutes into workout-with pain episode. Tried numerous meds to control hrt rate-atenolol, verapamil and now on toprol xl 50mg daily + baby asprin.