心搏指数与对照组比较有所增加（P<0.05）；

Cardiac Index was increased in treatment groups than that in controls(P<0.05);

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心排血指数（CI）及每搏输出量（SV）升高或下降不一致，但均接近正常范围。

The levels of CO, CI and SV increase or decrease were different, but all approached to normal range.

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结果：两组患者心排血量（CO）、心脏指数（CI）、每搏量（SV）和每搏指数（SI）等指标在硬膜外阻滞平面固定后均有明显下降。

Results: Cardiac Output (CO), Cardiac Index(CI), Stroke Output(SV) and Stroke index(SI) in two groups were significantly decreased when the sensory levels were finally distributed to T_6-S.

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结果：两组患者心排血量（CO）、心脏指数（CI）、每搏量（SV）和每搏指数（SI）等指标在硬膜外阻滞平面固定后均有明显下降。

Results: Cardiac Output (CO), Cardiac Index(CI), Stroke Output(SV) and Stroke index(SI) in two groups were significantly decreased when the sensory levels were finally distributed to T_6-S.

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