Myocardial infarction with unsuccessful stenting can cause damage to blood vessels. Acute myocardial infarction is the occurrence of acute blockage of blood vessels, the current rapid treatment is emergency stent implantation, can quickly open the diseased blood vessels, increase the blood supply of coronary arteries, reduce myocardial necrosis, and improve the patient’s prognosis. However, some patients may not be able to successfully implant a stent, such as too thin blood vessels, tortuous blood vessels, or diffuse coronary artery lesions. In the process of stent implantation, the coronary arteries should be dilated with a balloon, and the balloon dilatation process will lead to localized plaque rupture, and may even lead to endothelial tears, which will cause damage to the cardiac vasculature. The damage of the balloon during the implantation of stents is limited, and a very small number of patients may cause stenosis of the blood vessels, which is relatively large, and may even cause acute occlusion of the blood vessels. Coronary PCI for acute myocardial infarction should be performed with care to minimize damage to the vascular endothelium and prevent coronary artery entrapment. If you have any symptoms of discomfort, you should go to the hospital in time and consult your physician for guidance.