Hardness of the heart is not a concept of medical scope, it should be heart attack. Heart attack refers to the coronary blood vessels supplying the heart on the basis of lesions, the occurrence of a sudden and sharp reduction or interruption of blood supply, so that the corresponding cardiac muscle cells because of ischemia appear degeneration and necrosis, called myocardial infarction referred to as heart attack. Most patients have high risk factors, such as old age, smoking, high blood fat, high blood sugar, heredity, which lead to the formation of coronary atherosclerotic plaque, and thrombosis on the basis of unstable plaque rupture and erosion, resulting in lumen occlusion and acute myocardial infarction. Once the patient is diagnosed with acute myocardial infarction, it is necessary to actively open the blood vessels, restore coronary blood flow, to prevent the patient from sudden death, cardiac insufficiency performance. For patients with myocardial infarction, time is life, time is myocardium, especially emergency interventional therapy, stent implantation is the most effective method of treating acute myocardial infarction, which has been widely used in our country, including the use of county hospitals, and saved the lives of a large number of patients.