Cardiogenic asthma is a type of asthma-like disease caused by heart disease, so it is called cardiogenic asthma. 1. Etiology: The most common causes of cardiogenic asthma are acute left heart failure and acute pulmonary edema, and the clinical manifestations of its attacks are similar to those of bronchial asthma, but such patients often have no previous history of asthma and generally have no triggers for asthma attacks; patients with cardiogenic asthma often have a previous history of hypertension, coronary heart disease, arrhythmia, structural heart disease or heart failure; 2. During an attack, patients often have shortness of breath, severe inability to lie down, irritability, accompanied by frequent coughing, coughing up foam-like or especially blood-foam-like sputum, etc. Dyspnea is the most important clinical manifestation of cardiogenic asthma, and paroxysmal dyspnea at night is common. Patients may wake up at night due to breathlessness and shortness of breath, with coughing, asthma or coughing up foamy sputum; less severe cases can be relieved by taking a sitting position for more than 10 minutes to about 1 hour, while severe cases continue to be unrelieved, and symptoms may gradually worsen, accompanied by cyanosis, profuse sweating and cold hands and feet, requiring immediate medical attention; 3. Other factors. In addition to heart disease, some patients may also have asthma and dyspnea due to mood factors, such as anger, fear, depression and anxiety, which do not fall under the category of cardiogenic asthma. Cardiogenic asthma, which often suggests a poorer or dramatic decline in the function of the heart, needs to be seen as soon as possible to find the cause and actively treat it under the guidance of a doctor.