If the patient has frequent chest pain with shortness of breath, coronary artery disease and cardiac insufficiency manifestations are considered, and the patient should promptly visit the chest pain center in the cardiology department or emergency medicine department of the local hospital. Blood tests for myocardial markers should be drawn and repeated 4-6 hours later to rule out acute myocardial infarction causing chest tightness and shortness of breath. If the patient is able to rule out an acute infarction, he or she may receive further treatment from the cardiology department. If the patient is in acute infarction, an emergency coronary angiography procedure should be performed and post-operative transport to the intensive care unit of the cardiology department. After arriving at the cardiology department, the patient should take anti-platelet drugs, lipid-regulating and plaque stabilizing drugs, and undergo cardiac ultrasound. Cardiac ultrasound mainly determines whether there are structural changes in the heart, including whether there is obvious dilatation of each atrium and ventricle, whether there is moderate or severe regurgitation of valves, and a very important test is that the contractile capacity of the heart can be assessed by cardiac ultrasound. Such patients can be clinically treated with diuretics to aid in the elimination of water from the body and reduce pulmonary stasis, which can reduce the patient’s symptoms of chest tightness and shortness of breath, and with the addition of ACEI drugs, beta-blockers, and aldosterone inhibitors. It should be noted that if the patient is in acute heart failure, beta-blockers are temporarily prohibited and need to be increased in time only when the symptoms improve and the condition is under control.