The things you need to pay attention to after heart bypass include strengthening nutrition, controlling risk factors, appropriate activities, and adhering to medication. 1. Strengthen nutrition. Cardiac bypass patients should pay attention to strengthening nutrition after surgery, consume more high protein and high calorie food, and eat more fruits and vegetables. However, they should pay attention to light, low-salt and low-fat diet, avoid satiety and reduce the intake of cholesterol. 2. Control risk factors. Cardiac bypass patients must control high risk factors such as blood pressure, blood fat and blood sugar after surgery, quit smoking and drinking, and maintain a good and stable emotional state as well as living habits. 3. Appropriate exercise. Cardiac bypass patients should carry out appropriate activities without discomfort after surgery, mainly resting at first, gradually increasing the amount of activity, and carrying out appropriate aerobic exercise. 4. Adherence to medication. Cardiac bypass patients should insist on taking medication after the operation, and insist on taking aspirin and other anti-platelet aggregation, atorvastatin and other lipid-lowering drugs for a long time. If the patient is not feeling well, he should go to the hospital in time to avoid delaying his condition.