Hello, He should have a healthy lifestyle like avoiding fatty, oily and high calorie diet. Have low salt diet and monitor blood pressure regularly. He should strictly have fluids restrictions including water, tea, milk, coffee and liquids in diet to less than 1 litre usually depending upon ejection fraction. Regular exercises like walking according his capacity atleast 30 min a day and 5 days a week. Lots of green leafy vegetables, fruits, fish once or twice a week, avoid meat. Avoid smoking and alcohol if any. There shouldn t abdominal fat deposition or obesity. Get your lipid profile and sugars tested once..