The most common cause of cough due to heart disease is cardiac insufficiency, which has the following characteristics: 1. 3. accompanied by a history of hypertension, diabetes and heart disease. 4. with physical signs of heart disease, such as lower limb edema, etc. If the above characteristics are present, it is likely that the cough is caused by heart disease. Other diseases can also be very close to the manifestations of heart disease, such as bronchial asthma, whose symptoms of cough and dyspnea are also characterized by aggravation at night and aggravation in a lying position. Patients with heart disease can also develop a cough when taking oral ACEI drugs, and it is important to identify whether the cough is caused by heart disease or by drugs.