My Dad Is 75 Years Old, And In The Past

My dad is 75 years old, and in the past year he's had several different health problems, and I was wondering if they're connected. He's had severe indigestion, whenever he eats or drinks anything it causes gassy bloating and he's unable to release it. He's also had problems with his heart. He's had irregular heartbeat and the doctor said that his heart isn't pumping blood the way it's supposed to. He's had a lot of chest pain and the doctor has given him a blood thinner so that the heart can pump the blood easier. The doctors seem to be flabbergasted and not really sure what the bottom line problem is to help my dad, do you have any ideas.