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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Mitral septal Angle (MSA), an index of left ventricular diastolic function, was negative correlative relationship with ejection fraction (ef) in the rest.

静息状态下，左心室舒张功能指标-二尖瓣室间隔角(msa)与射血分数(EF)呈负相关。

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Objective To evaluate the accuracy of left ventricular ejection fraction (ef) and fractional shortening (FS) for predicting ventricular arrhythmias (va) after coronary artery bypass grafting (CABG).

目的研究冠状动脉旁路移植术(CABG)前左心室射血分数(EF)和左心室缩短分数(FS)对术后室性心律失常(VA)预测的准确性。

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