Exercise radionuclide ventriculography in children: normal values for exercise variables and right and left ventricular function.
Exercise radionuclide ventriculography in children: normal values for exercise variables and right and left ventricular function.
复制标题
儿童运动放射性核素心室造影：运动变量和左右心室功能的正常值。
作者：
M. Parrish;R. Boucek;J. Burger;M. Artman;C. Partain;T. Graham
32名5-19岁的儿童(年龄5-19岁)在自行车测功机上进行连续的仰卧位训练，没有明显的心血管疾病的临床证据。在安静和每个运动阶段进行多门控核素脑室造影术。运动持续时间和总工作量均随年龄增长而增加。有氧运动与年龄的相关性比总运动量更大。在大多数儿童中，运动使两个脑室的射血分数增加了至少5%。在任何受试者中，右室射血分数都没有随着运动而降低，但有两个受试者的左心室射血分数降低了2%和9%。舒张末容量对运动的反应是不同的，但左(29(22)%)和右(30(19)%)的平均收缩末期容量(SD)一致下降。心脏指数(平均SD)随运动增加234(65)%。静息状态下左、右室舒张末容积比(SD)为1.26(0.26)。结论：运动核素脑室造影术是综合评价儿童运动能力、评价脑室大小和运动能力的一种很好的方法。在没有明显心血管疾病的儿童中，这些仰卧式自行车锻炼的值将有助于未来与其他组的比较。
Thirty two children (aged 5-19 years) with no clinical evidence of significant cardiovascular disease undertook continuous staged supine exercise on a bicycle ergometer. Multigated radionuclide ventriculography was performed at rest and during each exercise stage. Exercise duration and total workload both increased with age. Aerobic work correlated better with age than did total work. In most children the ejection fraction for both ventricles increased by at least 5% with exercise. Right ventricular ejection fraction did not decrease with exercise in any subject but left ventricular ejection fraction decreased by 2% and 9% in two. The response of end diastolic volume to exercise was variable, but there was a consistent decrease in mean (SD) end systolic volume of the left (29(22)%) and right (30(19)%) ventricles. Cardiac index (mean (SD)) increased by 234(65)% with exercise. The left ventricular:right ventricular end diastolic volume ratio (mean (SD)) at rest was 1.26(0.26). It is concluded that exercise radionuclide ventriculography is an excellent technique for a combined assessment of exercise capacity and an evaluation of ventricular size and performance in children. These values for supine bicycle exercise in children without significant cardiovascular disease will be useful for future comparisons with other groups.