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随着生理和病理情况下心脏泵功能研究的进展,人们认识到心泵储备功能指标在评定心功能中具有重要的价值。容量负荷是临床和实验研究中常用的确定心泵储备功能的方法之一,但在临床上,不可能通过过度增加回心血量来获得心输出量峰值(即反映心脏最大舒张储备功能的指标),故一般采用有限量的液体(100～2000ml)输入来改变心脏前负荷,根据心输出量的变化值来了解心泵储备功能。然而,该指标能否可靠地反映最大的舒张储备能力,以及与其他心脏储备功能指标的相关关系如何,目前尚不清楚。
With the progress of research on cardiac pump function under physiological and pathological conditions, it is recognized that cardiac pump reserve function indexes are of great value in assessing cardiac function. Capacity load is one of the most commonly used methods to determine heart pump reserve function in clinical and experimental studies. However, it is clinically impossible to obtain peak cardiac output (ie, an index that reflects the maximum diastolic function of the heart) by excessively increasing the amount of blood returned to the heart. , So the general use of a limited amount of liquid (100 ~ 2000ml) input to change the heart before the load, according to changes in cardiac output to understand the heart pump reserve function. However, it is unclear whether this indicator can reliably reflect the maximum diastolic reserve capacity and its correlation with other cardiac reserve function indicators.