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心脏可视为一个泵,即心泵。“泵衰竭”(Pump failure)是指在很短时间内,由于心肌收缩功能明显减退,引起的一系列严重临床表现。泵衰竭的主要原因通常是急性心肌梗塞,临床上表现为左心衰竭和心源性休克。主要血流动力学特征是心排血量降低和左室充盈压升高。急性心肌梗塞病人的泵功能和预后直接相关。一般估计,无心衰者病死率在10%以下,严重心衰者约半数死亡,合并心源性休克时病死率高达70%～60%。
The heart can be regarded as a pump, heart pump. “Pump failure” refers to a series of serious clinical manifestations caused by a marked decrease in myocardial contractility in a very short period of time. The main cause of pump failure is usually acute myocardial infarction, clinically manifested as left ventricular failure and cardiogenic shock. The main hemodynamic characteristics are decreased cardiac output and increased left ventricular filling pressure. Acute myocardial infarction patients with pump function and prognosis are directly related. The general estimate, no heart failure mortality less than 10%, severe heart failure, about half of deaths, combined with cardiogenic shock when the mortality rate as high as 70% to 60%.