The greatest risk of complete occlusion of the right coronary artery is sudden death. Complete occlusion of coronary artery can cause a series of important problems, such as cardiogenic shock, malignant arrhythmia, heart rupture, etc. The cause is occlusion caused by acute ischemia and hypoxia of coronary artery in a short period of time. Common high-risk factors include hypertension, diabetes, hyperlipidemia, smoking, and obesity. This is a common acute and critical condition in cardiology and must be treated promptly at the nearest relevant regular hospital. The main treatment is oral anti-platelet drugs Bay aspirin and Tegretol. Lipid-regulating drugs, subcutaneous injection of heparin, etc. If the hospital has the condition, coronary angiography can be performed to open the narrowed blood vessel in time, and if necessary, stent implantation can be performed. In hospitals without such conditions, thrombolytic therapy can be performed.