诊断儿童卵圆孔未闭时经食管超声心动描记术有必要吗？

Diagnosing a Patent Foramen Ovale in Children: Is Transesophageal Echocardiography Necessary?

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按照美国超声心动描记术学会的建议评价心脏瓣膜返流。

Valve regurgitation was assessed according to American Society of Echocardiography recommendations.

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目的探讨超声心动描记术估测左心室做功量和机械效率的新指标。

Objective To establish noninvasive new indices for the evaluation of left ventricular (LV) work and mechanical efficiency.

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