Cardiogenic pulmonary edema is usually caused by severe impairment of cardiac function in the late stages of various heart diseases, such as coronary heart disease, hypertensive heart disease, and valvular disease. The sudden decline in cardiac function due to the disease leads to a sudden decrease in left-sided cardiac output, and may cause a sharp increase in the amount of return blood and right-sided cardiac output, resulting in a large amount of blood stagnation in the pulmonary circulation and an increase in pulmonary capillary venous pressure. The clinical manifestations are sudden onset of seated breathing, dyspnea, coughing of large amounts of pink frothy sputum, and scattered wet rales on auscultation of both lungs. Treatment should include early correction of cardiac function and symptomatic treatment such as cardiotonic, diuretic and vasodilator therapy, otherwise it can be life-threatening.