<International Circulation>:Why do we want to take central pressure? Why do we want such an accurate measurementof  blood pressure? Why is waveform important? 
  《国际循环》：为什么我们需要测量中心血压？为什么对血压的测量要如此精确呢？为什么血压的波形如此重要？
    Prof. Alvolio :The structure of the arterial system is such that when the pulse travels it changes the wave shape. By definition， the wave shape changes and the pulse pressure increases. Especially during exercise with higher heart rates， the peak pressures that one measures arterially are actually different than the peak pressures near the heart. So if one wants to assess cardiac function in terms of peak load on the heart， it becomes problematic because it is not actually the real value. The way to obtain the real value is to have the conventional cuff measurement supplemented with a wave form where that information is contained. 
    Alvolio教授：动脉系统的结构是这样的，当脉搏经过动脉时它会出现波形的改变。很明显，当波形改变时脉搏压力同时也增加。特别是在运动中心率增快的情况下，测量所得的动脉压力峰值实际上和接近心脏的压力峰值是不同的。所以如果我们想要通过心脏的压力负荷评估心脏功能，测量外周血压就不能准确地得出结论，因为外周血压实际上并不是心脏压力的真实值。获得心脏压力负荷真实值的方法是用一种传统的袖带测量法提供波形来反映心脏的压力负荷。