Myocardial infarction is myocardial necrosis, mainly occlusion of the vessels supplying the heart. Which vessel is occluded, whether it can be recanalized, in what way it can be recanalized, and whether there is residual stenosis after it is recanalized, etc. must be judged by imaging methods. There are two ways to determine the lesions of coronary arteries, coronary CT and coronary angiography, but the most important method is to make clear the occlusion lesions by rapid angiography in acute myocardial infarction and to implant stents in time to revive the necrotic heart muscle. Therefore, the treatment slogan of acute myocardial infarction is that time is myocardium and time is life. Every hour earlier the blood vessel is passed, the area of myocardial infarction necrosis will be reduced by 10%. Angiography is the primary modality and necessary tool for interventional treatment. In order to clarify the lesion of acute heart attack, angiography must be done, and it can be done to clarify the lesion for timely treatment. In addition, coronary angiography can also clarify whether the lesion of the coronary artery is proximal or distal, whether stenting can be done, or only bypass can be done, or only conservative treatment can be done.