Hi I Good afternoon. I am Dr Shareef answering your query. It is less likely that your symptoms of acid reflux are in anyways related to the previous cardiac surgery. Regarding the refulx, the following might prove to be helpful: 1) Elevate the head end of the bed with two blocks on each side, so that the regurgitation does not occur while lying down, and the contents of esophagus and stomach flow down with gravity. 2) Some modification in your diet like more of roughage, enough liquids, avoidance of oily, fried, and fast food, and alcohol/smoking. 3) Regular routine exercises like morning walk depending on your medical fitness. 4) Prescription for a prokinetic agent and a proton pump inhibitor (esomeprazole/Rabeprozole/pantoprazole) for symptomatic relief and to have a control on the acid production and facilitate movement of gastric contents downwards. 5) Get a stool test done for ruling out a parasitic infestation. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.