Zhang Y, Nitter-Hauge S, Ihlen H, Myhre E
Br Heart J. 1985 Feb;53(2):130-6. doi: 10.1136/hrt.53.2.130.
Cardiac output was determined in 20 patients with various cardiac conditions by measuring the cross sectional area of the mitral orifice by echocardiography and the transmitral flow by the Doppler technique. Cardiac output was calculated by multiplying the corrected mitral orifice area by the maximum diastolic velocity integral recorded by the pulsed mode. The results were compared with that obtained by the Fick method. The correlation for cardiac output by the two techniques was high in the whole group, particularly in patients without mitral regurgitation. There was also a good correlation for stroke volume determined by the two methods. Cardiac output was significantly overestimated by the continuous mode and in patients with mitral regurgitation. These results show that the mitral orifice method provides a new and reliable approach to the non-invasive measurement of cardiac output.
通过超声心动图测量二尖瓣口的横截面积，并采用多普勒技术测量二尖瓣血流，从而测定了20例患有各种心脏疾病患者的心输出量。心输出量通过将校正后的二尖瓣口面积乘以脉冲模式记录的最大舒张期速度积分来计算。将结果与通过菲克法获得的结果进行比较。在整个组中，两种技术测定的心输出量相关性很高，尤其是在没有二尖瓣反流的患者中。两种方法测定的每搏输出量也有良好的相关性。连续模式以及二尖瓣反流患者的心输出量被显著高估。这些结果表明，二尖瓣口法为心输出量的无创测量提供了一种新的可靠方法。
