Carr K W, Engler R L, Forsythe J R, Johnson A D, Gosink B
Circulation. 1979 Jun;59(6):1196-206. doi: 10.1161/01.cir.59.6.1196.
Cross-sectional echocardiography is a new noninvasive technique for imaging the heart. We developed a method for using mechanical cross-sectional echocardiograms (sector scans) to determine left ventricular volumes and ejection fraction. Using left ventricular cineangiography as a standard, sector scan ejection fraction correlated better (r = 0.93) than M-mode echocardiography by any of three established methods, and the sector scan regression line did not differ from the line of identity (p greater than 0.33). Interobserver variability for sector scan ejection fraction was 2.3 +/- 1.2% (mean +/- SD). Variation between two studies performed within 24 hours and analyzed by the same observer was 1.4 +/- 1.5%. However, the sector scans consistently underestimated left ventricular end-diastolic volume. We conclude that sector scan echocardiography is more reliable than conventional M-mode technique for estimating left ventricular ejection fraction, but estimation of left ventricular end-diastolic volume is unreliable with the methods currently available.
横断面超声心动图是一种用于心脏成像的新型无创技术。我们开发了一种利用机械横断面超声心动图（扇形扫描）来测定左心室容积和射血分数的方法。以左心室电影血管造影作为标准，通过三种既定方法中的任何一种，扇形扫描射血分数的相关性（r = 0.93）都比M型超声心动图更好，并且扇形扫描回归线与恒等线无差异（p大于0.33）。观察者间扇形扫描射血分数的变异性为2.3 +/- 1.2%（均值 +/- 标准差）。由同一观察者在24小时内进行并分析的两项研究之间的变异性为1.4 +/- 1.5%。然而，扇形扫描始终低估左心室舒张末期容积。我们得出结论，对于估计左心室射血分数，扇形扫描超声心动图比传统M型技术更可靠，但就目前可用的方法而言，左心室舒张末期容积的估计并不可靠。
