Cha R, Yang S S, Salvucci T, DiBlasi S
Deborah Heart & Lung Center, Browns Mills, NJ 08015.
N J Med. 1994 Sep;91(9):597-602.
Even though there has been some criticism regarding the Doppler evaluation in prosthetic valves because of inter-observer and intra-observer variability, among other factors, and Doppler study has a tendency to have falsely high gradients compared to invasive studies, especially mechanical aortic prostheses, Doppler evaluation can provide reliable hemodynamic information about valve function. This test may be particularly useful if used serially, when baseline values are known. Doppler measurement of gradient and valve area has an expected normal range that is specific for the prosthetic type, size, anatomical position, and chronological age. Clearly, a database involving these aspects is needed to provide a more accurate normal range. This study is intended to provide guidance for echocardiographers.
尽管由于观察者间和观察者内的变异性等因素，人工瓣膜的多普勒评估受到了一些批评，并且与侵入性研究相比，多普勒研究往往存在梯度假性升高的情况，尤其是机械主动脉瓣，但多普勒评估仍可提供有关瓣膜功能的可靠血流动力学信息。如果在已知基线值的情况下连续使用，该检查可能特别有用。梯度和瓣膜面积的多普勒测量有一个特定于人工瓣膜类型、尺寸、解剖位置和实际年龄的预期正常范围。显然，需要一个包含这些方面的数据库来提供更准确的正常范围。本研究旨在为超声心动图医师提供指导。
