I received 5xbypass grafts 20 years ago and a stent 2.5 years ago. I am still having lots of heart problems regularly> 3 times a month. I know they always follow a sense of bloating or fullness in my stomach and my food is taking longer to digest. The doctors are always dismissing it! When I take some digestion aids the problem does not occur. What can I do to improve my digestion?