Ichihashi K, Shiraishi H, Momoi M
Department of Pediatrics, Jichi Medical School, Kawachigun, Tochigi, Japan.
Cardiol Young. 2000 Oct;10(4):388-95. doi: 10.1017/s1047951100009707.
To investigate the pattern of flow in the superior caval vein in children after open heart surgery, we examined the flow velocity curves in 37 patients who had undergone surgical correction of either ventricular or atrial septal defects. The control group consisted of 64 age-matched children. We used pulsed Doppler examinations to record the velocity curves. We measured the highest and lowest peak flow velocities during systole and diastole, and calculated ratios for the various measurements. We found that the velocity of the wave in systole is lower than that of the wave in diastole in the postoperative patients, which is contrary to the normal pattern. The velocity in systole increases more than that in diastole during inspiration, which is also different from the normal pattern. The change in pattern of flow velocity curve during respiration was smaller in patients after surgery than in normal subjects, which might indicate that there is less reserve ability in the right atrium in postoperative patients.
为研究儿童心脏直视手术后上腔静脉的血流模式，我们检查了37例接受室间隔或房间隔缺损手术矫正患者的血流速度曲线。对照组由64名年龄匹配的儿童组成。我们使用脉冲多普勒检查记录速度曲线。我们测量了收缩期和舒张期的最高和最低峰值流速，并计算了各种测量值的比率。我们发现，术后患者收缩期波速低于舒张期波速，这与正常模式相反。吸气时收缩期速度比舒张期增加得更多，这也与正常模式不同。术后患者呼吸过程中血流速度曲线模式的变化比正常受试者小，这可能表明术后患者右心房的储备能力较低。
