Ruschhaupt D G, Sodt P C, Hutcheon N A, Arcilla R A
J Am Coll Cardiol. 1983 Jul;2(1):77-84. doi: 10.1016/s0735-1097(83)80379-9.
The M-mode and two-dimensional echocardiograms of 40 young patients were analyzed to compare the mean circumferential fiber shortening velocity (Vcf) of the left ventricle calculated separately by two methods. The mean circumferential fiber shortening velocity was derived from the M-mode echocardiogram as minor axis shortening/ejection time and derived from the two-dimensional echocardiogram as actual circumference change/ejection time. With computer assistance, circumference was determined from the short-axis two-dimensional echocardiographic images during end-diastole and end-systole. Good correlations were obtained between the left ventricular diameter derived by M-mode echocardiography and the vertical axis during end-diastole (r = 0.79) and end-systole (r = 0.88) derived by two-dimensional echocardiography. Likewise, high correlations were noted between diameter and circumference in end-diastole (r = 0.89) and end-systole (r = 0.88). However, comparison of Vcf obtained by M-mode echocardiography with that obtained by two-dimensional echocardiography showed only fair correlation (r = 0.68). Moreover, the diameter/circumference ratio determined in end-diastole and end-systole differed significantly (p less than 0.001), possibly owing to the change in geometry of the ventricular sector image during systole. Although Vcf derived by M-mode echocardiography is a useful index of left ventricular performance, it does not truly reflect the circumference change during systole.
分析了40例年轻患者的M型和二维超声心动图，以比较用两种方法分别计算的左心室平均圆周纤维缩短速度（Vcf）。平均圆周纤维缩短速度从M型超声心动图得出为短轴缩短/射血时间，从二维超声心动图得出为实际周长变化/射血时间。在计算机辅助下，根据舒张末期和收缩末期的短轴二维超声心动图图像确定周长。M型超声心动图得出的左心室直径与二维超声心动图得出的舒张末期垂直轴（r = 0.79）和收缩末期垂直轴（r = 0.88）之间存在良好的相关性。同样，舒张末期直径与周长（r = 0.89）和收缩末期直径与周长（r = 0.88）之间也存在高度相关性。然而，M型超声心动图获得的Vcf与二维超声心动图获得的Vcf比较仅显示出中等相关性（r = 0.68）。此外，舒张末期和收缩末期确定的直径/周长比差异显著（p小于0.001），这可能是由于收缩期心室扇形图像的几何形状变化所致。尽管M型超声心动图得出的Vcf是左心室功能的一个有用指标，但它并未真正反映收缩期的周长变化。
