Coronary heart disease refers to the heart supply cardiac vascular nutrition of blood vessels occurred in varying degrees of narrowing, or even completely occluded, resulting in insufficient blood supply to the heart or completely interrupted, so that coronary heart disease occurs. Types of coronary heart disease are: angina pectoris myocardial infarction myocardial infarction arrhythmia ischemic cardiomyopathy sudden death angina pectoris and myocardial infarction two types do not say more, the people know more. Arrhythmia type is this disease irregular heartbeat, but no chest pain symptoms, this time need to be vigilant is not the emergence of coronary heart disease. Ischemic cardiomyopathy, this type of clinical manifestation of the heart enlargement, patients with heart failure, it is very easy to misdiagnose as dilated heart failure. In these cases, you need to undergo angiography, so as to clarify the diagnosis of coronary heart disease.