Cardiac output (CO), PCWP and CVP were measured with pulmonary artery catheter.

通过肺动脉导管记录心输出量(CO)、肺毛细血管楔压(PCWP)和中心静脉压(cvp)。

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Ejection fraction(EF) and cardiac output(CO) of patients in the 3 groups were evaluated before, 4 and 8 weeks after operation respectively.

分别对3组患者术前、术后4周、8周心脏射血分数（EF）及心输出量（CO）进行观察。

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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.

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。

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