Nicolosi G L, Pungercic E, Cervesato E, Modena L, Zanuttini D
Br Heart J. 1986 May;55(5):446-8. doi: 10.1136/hrt.55.5.446.
The variability of the interpretation by two individuals of a combined echocardiographic and Doppler method of calculating output was studied in 30 normal adults. In each subject three separate cardiac cycles were recorded to calculate maximal mitral valve orifice, the ratio of mean to maximal mitral valve leaflet separation, and the mean flow velocity through the mitral valve. The recordings were digitised twice by two independent observers. Estimates of cardiac output ranged from 3.2 to 8.11 1/min. Analysis of variance showed that interobserver and intraobserver variability for these measurements was 5.8% and 6.1% respectively. It is concluded that the reproducibility for interpreting this non-invasive method is adequate for clinical use in adults with cardiac outputs within the normal range.
在30名正常成年人中研究了两名个体对结合超声心动图和多普勒方法计算心输出量的解释的可变性。在每个受试者中记录三个独立的心动周期，以计算最大二尖瓣口面积、平均与最大二尖瓣叶分离比值以及通过二尖瓣的平均流速。记录由两名独立观察者进行两次数字化处理。心输出量估计值范围为3.2至8.11升/分钟。方差分析表明，这些测量的观察者间和观察者内变异性分别为5.8%和6.1%。结论是，对于正常心输出量范围内的成年人，解释这种非侵入性方法的再现性足以用于临床。
