Coronary heart disease occurs when the blood vessels supplying nutrients to the heart vessels are narrowed to varying degrees or even completely occluded, resulting in insufficient or complete interruption of blood supply to the heart. The types of coronary heart disease are: 1, angina type 2, myocardial infarction type 3, arrhythmia type 4, ischemic cardiomyopathy type 5, sudden death type Angina and myocardial infarction type do not say more, the people know more. Arrhythmia type is also this disease heartbeat irregular, but no chest pain symptoms, this time need to be alert to the emergence of coronary heart disease. Ischemic cardiomyopathy, this type of clinical manifestations of the heart enlargement, the patient appears heart failure, very easy to misdiagnose as dilated heart failure. In these cases, it is necessary to undergo angiography so that the diagnosis of coronary artery disease is clear.