Coronary atherosclerosis is not a blood clot. Coronary atherosclerosis also refers to the heart of the coronary artery blood vessels appear hardening changes, mainly refers to the formation of plaque under the arterial lining, the composition of the lipid, calcification, etc., which will cause a decrease in the elasticity of the blood vessels, blood vessel wall hardening, resulting in narrowing of the lumen, which affects the heart’s own blood supply, resulting in angina pectoris, chest tightness, heart rate increase and other symptoms. Thrombus is mainly seen in the venous blood vessels and arterial blood vessels, arterial thrombus embolism dislodgement will be with the arterial blood flow embolization of distant blood vessels, caused by embolism site of tissue and organs of the blood supply and oxygen supply abnormalities; venous thrombus is mainly the endothelial cells of the venous blood vessels damage, the local platelet aggregation to form a mass. However, atherosclerotic subendothelial plaque rupture can be secondary to thrombosis, resulting in acute myocardial infarction. If you have atherosclerosis or thrombosis, you should go to the hospital as soon as possible for examination and follow the doctor’s instructions to standardize the treatment.