What diseases should be differentiated from coronary artery disease? It should be differentiated from myocarditis, hypertrophic obstructive cardiomyopathy, pericarditis, pleurisy, etc.: 1. Myocarditis Myocarditis refers to acute, subacute or chronic inflammatory lesions in the myocardium that are limited or diffuse. The relative incidence of viral myocarditis has been increasing in recent years. The severity of the disease varies widely, with more severe cases in infants and children and less severe cases in adults, with no obvious symptoms in the milder cases and serious arrhythmias, cardiac insufficiency and even sudden death in the more severe cases. The patient may have fever, fatigue, excessive sweating, panic, shortness of breath, and boredom in the precordial region. The examination may reveal arrhythmias such as pre-phase contraction and conduction block. Glutathione transaminase and creatine phosphokinase are increased, and blood sedimentation is increased. Electrocardiogram and X-ray are helpful for diagnosis. Treatment includes sedation, improvement of myocardial nutrition, control of cardiac insufficiency and correction of arrhythmias, prevention of secondary infections, etc. 2, pericarditis Pericarditis can be divided into acute pericarditis, chronic pericarditis, constrictive pericarditis, patients may have fever, night sweats, cough, sore throat, or vomiting, diarrhea. The patient may have fever, night sweats, cough, sore throat, vomiting and diarrhea. There may also be ascites, hepatomegaly and other symptoms. 3, pleurisy Pleurisy, also known as “costochondritis”, is an inflammation of the pleura. After the inflammation subsides, the pleura may return to normal, or two layers of pleura may adhere to each other. It can be caused by a variety of causes, such as infection, malignancy, connective tissue disease, and pulmonary embolism. Tuberculous pleurisy is the most common one. In dry pleurisy, there is a small amount of fibrous exudate from the pleural surface, which manifests as severe chest pain that resembles pins and needles, and examination may reveal changes such as pleural friction sounds. In exudative pleurisy, with the increase of exudate in the pleural cavity, chest pain decreases or disappears, and the patient often has cough and may have dyspnea. In addition, there are often systemic symptoms such as fever, emaciation, fatigue, and loss of appetite. Examination may reveal signs of heart and lung compression. In case of large amount of pleural fluid, it can be detected by chest examination and X-ray. Treatment of tuberculous pleurisy mainly includes tuberculosis medication; accelerating the absorption of pleural fluid and, if necessary, aspiration therapy; preventing and reducing pleural thickening and adhesions, and choosing adrenal corticosteroids. Pleurisy is an inflammation of the pleural wall layer and the dirty layer caused by various reasons. It is mostly secondary to lesions in the lungs and chest, and can also be a local manifestation of systemic disease. There are several clinical types of pleurisy, with tuberculous pleurisy being the most common. For hyperthyroid heart, rheumatic heart disease, and coronary heart disease there is a special metrological differential diagnosis: hyperthyroid heart disease (referred to as hyperthyroid heart), rheumatic heart disease (referred to as rheumatic heart disease), and coronary arteriosclerotic heart disease (referred to as coronary heart disease) are three distinct cardiac lesions, but their manifestations are quite similar at certain periods of the disease, thus making them prone to misdiagnosis and mistreatment. Clinical application method: The various symptoms and signs (positive or negative) of the patients are recorded one by one according to the corresponding diagnostic indices in the table, and then added together, and those whose algebraic sum is >0 can be diagnosed with hyperthyroidism, and those whose algebraic sum is ≤0 can be excluded. The greater the sum, the greater the diagnosis of the disease. For example, a larger index of hyperthyroid heart is diagnosed as hyperthyroid heart, a larger index of coronary heart disease is diagnosed as coronary heart disease, and a larger index of wind heart disease is diagnosed as wind heart disease.