good morning---same problem here. inand out of the ER and cardio's offfice. have the heart of a 20 year old though i am much older. dr. after dr. test after test and finally dx with esophageal spasms. believe it or not my nerologist is the one who put his finder on it. I have most of the symptoms. also as you I very rarely have indegestion/heartburn. very few symptoms of gerd. have been on prevacid for about 4 years and just tried nexium. dr. gave me a bunch of samples and honestly i do better on prevacid. he also prescribed bentyl which seems to be helping a little though i don't take it everyday and probably should at least for awhile.