Pulmonary circulation stasis, also called pulmonary edema or acute left heart failure, is mainly due to a sudden increase in the load on the heart, which leads to a series of clinical symptoms, such as patients presenting as unable to lie down, in a sedentary position, sweating profusely, irritability, dyspnea, coughing pink foamy sputum, obvious dry and wet rales can be heard in the lungs, and in severe cases, patients will also have changes in their mental state, such as mental coma. In this case, the main thing is to reduce the load on the heart, and the symptoms of pulmonary circulation stasis will be significantly improved by active resuscitation measures such as cardiac strengthening, diuresis and coronary expansion, as well as oxygen and rest.