Drinking coffee for heart disease patients may cause cardiac hypoxia. Drinking large amounts of coffee may cause sympathetic nerve excitation and elevated blood lipids leading to hypoxia. 1. Sympathetic excitation: the caffeine in coffee will cause sympathetic excitation, which will accelerate the heart rate, increase myocardial contractility, enhance cardiac conduction, resulting in an increase in oxygen consumption of the heart, and if the body of the heart disease patients can not compensate in time, cardiac hypoxia may occur. 2. Elevated blood lipids: some coffee such as sugary lattes and other high calories, long-term drinking may lead to elevated blood lipids, aggravate atherosclerosis, cause coronary artery lumen narrowing, resulting in cardiac hypoxia. Heart disease patients are recommended to drink less or no coffee, but also low-salt and low-fat diet, pay attention to rest, quit smoking and alcohol, etc., to maintain a healthy lifestyle.