A severe stenosis of 80% is a more serious condition, which affects the blood circulation and leads to insufficient blood supply, and requires timely intervention. Clinical atherosclerosis, which further leads to wall thickening, calcification, and plaque formation, will cause lumen narrowing, and the degree of narrowing up to 80% is considered severe stenosis, which is a more serious condition. If the stenosis is not treated in time, it will lead to insufficient blood supply and the corresponding condition, which needs to be treated actively with stent implantation and other interventional surgeries to alleviate the local lumen narrowing condition. Severe stenosis, accompanied by obvious symptoms of insufficient blood supply, such as dizziness, precordial pain, etc., need to consult a doctor for observation in a timely manner, under the guidance of the clinician to carry out standardized treatment, to avoid causing delays in the condition.