Sahn D J, Valdes-Cruz L M
Cardiovasc Clin. 1986;17(1):19-31.
The variety of volume flow calculation methods described for determination of cardiac output by Doppler and the controversy surrounding their relative accuracy is to some extent a result of how difficult they are to use and the fact that they break down in patients whose anatomic and physiologic flow cross sections do not match, in patients who may have flow in vessels with flow profiles that are not flat, and in patients who are difficult to examine in one view or another or who do not give clean Doppler waveforms. Nonetheless, most of the methods work to some extent in most patients. Discovering those patients who do not fit the assumptions in these methods and whose cardiac output can therefore not be accurately calculated will probably be a major contribution of the new flow mapping Doppler technologies. We believe these new technologies may provide more sophisticated methods for calculating volume flows, cardiac outputs, regurgitant fractions, and shunt volumes.
为通过多普勒测定心输出量而描述的多种容积流量计算方法以及围绕其相对准确性的争议，在某种程度上是由于它们使用起来难度较大，且在解剖和生理血流横截面不匹配的患者、可能在具有非平坦血流轮廓的血管中有血流的患者、难以从某个视角进行检查或无法给出清晰多普勒波形的患者中会失效。尽管如此，大多数方法在大多数患者中在一定程度上是有效的。发现那些不符合这些方法假设、因此无法准确计算心输出量的患者，可能将是新的血流映射多普勒技术的一项主要贡献。我们相信这些新技术可能会提供更复杂的方法来计算容积流量、心输出量、反流分数和分流容积。
