Williams B O, Caird F I
Age Ageing. 1980 Feb;9(1):47-52. doi: 10.1093/ageing/9.1.47.
The cardiac output has been measured in 40 elderly patients by impedance cardiography and an isotopic indicator-dilution method. There was no significant systemic difference between the results obtained by the two methods. The mean difference between paired values was 0.76 1/min (approximately 16%). The value and limitations of impedance cardiography in the study of the circulation in the elderly are discussed.
采用阻抗心动图和同位素指示剂稀释法对40例老年患者的心输出量进行了测量。两种方法所得结果在全身水平上无显著差异。配对值之间的平均差异为0.76升/分钟（约16%）。本文讨论了阻抗心动图在老年患者循环系统研究中的价值和局限性。
