Brief history: I have coronary artery disease with 2 stents and failed bypass (as grafted vessels are too small). I also have dysautonomia with hypotension, which is currently somewhat under control. My symptoms currently are chest tightness and tight feeling in stomach, with burping, on exertion. I also get pain between my shoulders. My angina symptoms, in the past, have been different each time. That is why I pose this question. Could GERD be a possiblity on exertion, with the burping? Or should I be concerned that this may be angina. It seems to be getting more frequent and sometimes with less exertion. It is difficult to take nitro with the low blood pressure, but the tightness seems to pass when I rest for a minute or so or walk slower. (Bypass surgery was 1 year ago and the stent placed after was 10 mo. ago). Thank you for your help.