The variation of R wave amplitude has little relation with cardiac output, heart pumping function, especially with pulmonary wedge pressure.

波振幅的改变与心输出量及心脏的泵血功能，尤其是肺动脉楔压之间无明显关系。

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Results R(r) wave amplitude with the right forehead as the reference point was significantly larger than that with the central terminal as the reference point (P<0.05).

结果以右前额为参比点记录的心电图R（r）波振幅比以中心电端为参比点的心电图R（r）波振幅大，具显著性差异（P<0.05）。

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Results R(r) wave amplitude with the right forehead as the reference point was significantly larger than that with the central terminal as the reference point (P<0.05).

结果以右前额为参比点记录的心电图R（r）波振幅比以中心电端为参比点的心电图R（r）波振幅大，具显著性差异（P<0.05）。

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