My frieds pulse after walk was 130 & took an hr to come to 96.Burps started too. He has diabetes, GERD & has stents put in heart. Cud this be cos of acid?

HR. A rate of 130 post excercise is high and given CAD your friend should talk to his heart doc. Might be advisable to hold off strenuous activity until seen by MD. This is not due to GERD.