Had two stents placed in circumflex artery 90% blocked five months ago. I recovered quickly, began exercising, changed diet and have lost 30 pounds. All was well until two weeks ago when I began to have gas pains in my chest frequently, sometimes also tightness in upper left arm. But had no problems while exercising four or five times a week, fast walking and slow running for about 40 minutes each time. Saw cardiologist last week, he thinks discomfort in chest is GI not heart because it does not occur when I exercise. Today I had nuclear stress test, no problem got heart rate to 145 target felt fine, sent home after test. But I still get the gas pains in my chest in different places and sometimes tightness in chest and upper left arm. What do you think.