A coronary angiogram cannot be done for gastric bleeding, so it is necessary to treat the bleeding before performing a coronary angiogram. Coronary angiography is the “gold standard” for the diagnosis of coronary atherosclerotic heart disease, but if gastric bleeding and other gastrointestinal bleeding diseases, the first thing that needs to be done is to treat the gastrointestinal bleeding, fasting during the treatment period, the use of acid suppression such as omeprazole, growth inhibiting hormones to stop bleeding, rehydration and other treatments. However, it should be noted that coronary angiography is an invasive operation, before coronary angiography, it is necessary to exclude gastrointestinal bleeding and coagulation dysfunction, liver and kidney insufficiency, iodine allergy and other unfavorable factors, and to improve the routine examination of blood, biochemistry (liver function, renal function), urine and so on, in order to make sure that the physical condition can tolerate cardiac angiography surgery.