<International Circulation>:Do we have many different kinds of waveforms， competing ways of measuring central pressure or is there one accepted way?
  《国际循环》：那么请问是否存在多种波形都能测量中心血压还是只有一种已经被认可的测量方法？
    Prof. Alvolio :There are not competing but rather complimentary ways of measuring central pressure. Essentially， there is a technique called the general transfer function which uses the whole waveform. There is another technique that uses a feature of the wave form which is quite good in most cases that identifies the second systolic shoulder.If one calibrates that wave form， one can equate that second systolic shoulder to the peak value. In that case you do not get an ascending aortic waveform， but only the values. There are other techniques that look at applying some type of averaging where the wave form is averaged in a certain way and that average turns out to be close to the systolic pressure. Some of the devices coming out now look at central systolic pressure. Outcome studies on these devices are not yet availableto indicate whether there is use in knowing this extra number and whether it is better.We’ve seen the indicators that it seems to have additional value to the conventional measures of systolic pressure. Data are forthcoming to indicate whether treated to that value is actually better either in efficacy of treatment or avoiding treatment. 
    Alvolio教授：测量中心血压没有很多效果相当的方法，而是有一些互补性的方法。实际上，有一种利用全部波形的技术被称作一般传递函数。还有另外一种技术能利用波形的一些特征，在大多数情况下它的效果非常好，能识别第二个收缩性平台。如果我对波形进行测量，就会发现第二个收缩性平台等同于峰值。在这种情况下你不是得到上升的动脉波形，只能得到数值。还有其他技术旨在提供一些种类的平均值，这些均值出现于在一些特定情况下波形不变时，而且这种均值和收缩压很接近。现在新出现了一些设备主要反映中心收缩压。对这些设备的研究结果还没有显示它是否能测量其他的参数以及它是否比目前的设备更好。我们已经发现了一些指标，这些指标似乎对常规的收缩压测量有额外的价值。马上就会有资料表明治疗这些指标是否能真正能提高治疗的功效或是否能避免无意义的治疗。

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