In acute myocardial infarction, the threshold for ventricular fibrillation is significantly lowered, and ventricular tachycardia or ventricular fibrillation is easily induced if premature beats occur. This is one of the electrophysiological mechanisms that cause coronary artery occlusive arrhythmias. The incidence of sudden coronary artery occlusion with arrhythmia is as high as 95%, and the onset is rapid and dangerous, which can develop into ventricular fibrillation or cardiac arrest within a short time and lead to death. The most common cause of coronary artery obstruction is acute thrombosis on top of atherosclerotic stenosis, resulting in sudden coronary artery obstruction. Coronary artery spasm, infective endocarditis, wind heart disease, thrombus dislodgement from cardiomyopathy blocking coronary arteries, coronary angiography can also cause vascular occlusion with thrombus brought in via catheter, coronary artery injury entrapment aneurysm, PTCA procedure can also appear as coronary artery obstruction causing arrhythmia.