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。
2
RESULTS astemizole could slower the heart rate of mice, prolong P-R and Q-T interphase, even arise the complete AV block and sinus beat stop with the dose increase.