Mellander M, Sabel K G, Caidahl K, Solymar L, Eriksson B
Department of Pediatrics I, Gothenburg University, Sweden.
Pediatr Cardiol. 1987;8(4):241-6. doi: 10.1007/BF02427536.
Ten children, aged six weeks to 13 years, without intracardiac shunts or lesions that could cause turbulent flow in the ascending aorta or aortic regurgitation, underwent cardiac catheterization, including cardiac output measurements by thermodilution. Simultaneously with each of six consecutive thermodilution injections, mean and maximal blood velocities in the ascending aorta were measured by pulsed Doppler echocardiography from the suprasternal notch. Aortic root and aortic orifice diameters were measured with M-mode and cross-sectional echocardiography. One patient had to be excluded from the analysis because of inadequate Doppler recordings. The best agreement with the results of the thermodilution was observed when internal systolic aortic root diameter was combined with mean velocity (r = 0.97, y = 0.90x + 0.28, SEE = 0.31 liters/min). When cardiac output was normalized for body size, there was still a good correlation between the results of these two methods.
十名年龄在六周至13岁之间、无心脏内分流或可导致升主动脉湍流或主动脉反流病变的儿童接受了心导管检查，包括通过热稀释法测量心输出量。在连续六次热稀释注射的每一次过程中，通过脉冲多普勒超声心动图从胸骨上切迹测量升主动脉的平均和最大血流速度。用M型和横截面超声心动图测量主动脉根部和主动脉口直径。一名患者因多普勒记录不充分而被排除在分析之外。当将收缩期主动脉根部内径与平均速度相结合时，观察到与热稀释结果的最佳一致性（r = 0.97，y = 0.90x + 0.28，估计标准误差 = 0.31升/分钟）。当根据身体大小对心输出量进行标准化时，这两种方法的结果之间仍存在良好的相关性。
