I have experienced rapid heart beat associated with hard ,distended abdomen in the midriff area usually after eating but has occurred in late evening as well made worse on standing, walking. the episodes don't last the same amount of time and on a couple of occasions, symptoms were relieved by bowel movement. twice, when this happened, I was short of breath and did not feel right and on these two occasions, I went to ER. all cadiac enzymes were normal as well as EKG, CXR and echo stres test. the first episode was 2 years ago. The only change in my health, of significance, occurred last year when I had a partial nephrectomy for clear cell cancer of left kidney. All folow up scans have been normal. I am diabetic and taking Glucophage, Zestril and Crestor along with Fish oils, baby asprin, vitamin E, B 50, Slo-niacin, soya lecithin, Centrum. I have been taking these medication for over 5 years now.