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应用心阻抗图和染料稀释法,同体配对测定21例正常成人静卧时和运动后CO的变化。根据心阻抗图计算,运动后CO增加47％,而染料稀释法测定增加56％,均反映运动后CO增加显著。两种方法配对测定心搏量共42对数据,心阻抗法测得的SV均值虽较稀释法测定结果高5.6％,但无统计学意义;进行直线回归方程分析,显示密切相关(r=0.76)。结果提示心阻抗图测定与染料稀释法,均可反映正常成人运动后CO和SV的增量变化。
The cardiac impedance maps and dye dilution method were used to determine the changes of CO in the supine and locomotor activities of 21 normal adults. Calculated according to the cardiac impedance map, CO increased 47% after exercise, while the dye dilution method to determine an increase of 56%, both reflect a significant increase in CO after exercise. The two methods were used to determine the stroke volume of 42 pairs of data. The mean SV value measured by cardiac impedance method was 5.6% higher than that of the dilution method, but there was no statistical significance. Linear regression analysis showed a close correlation (r = 0.76 ). The results suggest that the determination of cardiac impedance spectrophotometry and dye dilution method, can reflect the normal adult movement of CO and SV incremental changes.