Patients with wind heart disease are prone to respiratory infections, which manifest as decreased resistance and a tendency to develop cold symptoms. Mainly on the basis of pulmonary stasis, it is easy to combine bacterial infections and aggravate heart failure. At the same time, patients with rheumatic heart disease may experience exertional panic and shortness of breath, and their physical tolerance decreases, and their quality of life is significantly affected. What are the hazards of rheumatic heart disease? Atrial fibrillation is the most common arrhythmia in rheumatic heart disease, with an incidence of more than 50%. It is sometimes the first disease, and can also be the cause of the first episode of dyspnea or the beginning of limited physical activity. Atrial fibrillation can lead to poor cardiac function, making the patient feel uncomfortable and, most importantly, may lead to intra-atrial thrombosis. 2. Thromboembolism: A large left atrium combined with atrial fibrillation can easily lead to thrombus formation, and thrombus dislodgement can cause embolism. Cerebral embolism can lead to hemiplegia and aphasia; arterial embolism of the extremities causes ischemia and necrosis of the limbs; deep vein thrombosis leads to pulmonary embolism. 3, infective endocarditis: occurs in the early stages of valve disease, bacteria attached to the valve leaflet surface, aggregating to form superfluous, infected bacteria commonly streptococcus, staphylococcus, enterococcus, etc.. Once infective endocarditis occurs, it can worsen heart failure. At the same time, the redundant organisms fall off and lead to embolism. 4, heart failure: for late complications, is the main cause of death in rheumatic heart disease, the incidence of 50-70%. The main manifestation is cardiogenic malignancy, multi-organ dysfunction.