Cardiogenic asthma is caused by left heart failure, resulting in the inability of blood to pump out of the left ventricle, the accumulation of blood in the lungs, and increased exudation in the alveoli, usually referred to as acute pulmonary edema. Because fluid accumulates in the airways and airways, a type of acute onset wheeze similar to the signs of a bronchial asthma attack is caused. The left ventricle is located at the left base of the human heart and has the function of transporting blood throughout the body. Left ventricular failure causes damage to its pumping function, resulting in insufficient oxygen to the body’s tissues and blood entering the lungs, leading to shortness of breath, coughing, coughing up blood, and chest tightness. If it is caused by pulmonary edema, the patient’s alveolar air sacs are filled with fluid, preventing normal gas exchange and producing symptoms related to mild hypoxia. Patients show breathing difficulties, wheezing, and a feeling of suffocation when lying down, and in severe cases, the lips and fingernails turn blue with the naked eye.