The common causes of cardiogenic shock are mainly the following: 1. Acute myocardial infarction. Especially in patients with hypertension, diabetes mellitus, hyperlipidemia, unexplained drop in blood pressure or even cardiogenic shock, the possibility of acute myocardial infarction must be considered, and early examination of electrocardiogram and cardiac ultrasound for diagnosis. 2, large pulmonary embolism. This kind of patient often has risk factors for deep vein thrombosis of the lower extremities, such as bed rest, lower extremity fracture and post-fracture fixation, etc. The sudden appearance of dyspnea, hemoptysis, rapid decrease in blood pressure, and even cardiogenic shock should be considered. 3. fulminant myocarditis. This is seen in patients with a recent history of colds or diarrhea, sudden onset of severe dyspnea, inability to lie down, continuous hypotension, should consider the possibility of fulminant myocarditis, early examination of cardiac ultrasound and troponin to clarify the diagnosis.