The complications of coronary intervention are as follows: 1. coronary artery entrapment, which refers to a complication in which the coronary artery intima is torn during the coronary intervention operation due to various reasons, and blood enters the arterial intima, forming a false lumen containing blood, which can trigger acute occlusion and rupture of the coronary artery; 2. acute coronary occlusion, which refers to the sudden occlusion of the target vessel during or after the intervention, during the intervention The most frequent cause of acute coronary occlusion is coronary artery entrapment, as well as coronary spasm and thrombosis secondary to this; 3, coronary artery perforation, a phenomenon in which the contrast agent flows outside the vessel through a clear coronary artery tear or rupture; 4, in-stent thrombosis, in-stent thrombosis caused by various reasons after stent implantation, resulting in complete or incomplete occlusion of the corresponding coronary artery lumen.