Aggarwal S P, Wander G S, Bala K, Kapoor D K
Department of Medicine, Dayanand Medical College and Hospital, Ludhiana, Punjab.
Indian Heart J. 1994 Nov-Dec;46(6):307-9.
In this study of stress testing, the posture in which patients were put had effect on heart rate, blood pressure, rate pressure product and ST-segment depression integral in the recovery phase. The systolic blood pressure in recovery phase of stress testing fell more rapidly towards normal pre-exercise value in sitting (Group I) than in lying down (Group II) posture (p < 0.05) from 2nd to 5th minute. The changes in heart rate were less and slower in lying posture than with sitting up. The decrease in rate pressure product (RPP), a determinant of myocardial oxygen requirement was lower in lying down than in sitting up posture (p < 0.05) from 2nd to 5th minute of recovery. Consequently, ST-depression, a marker of ischaemia was more marked in lying down than sitting up. The ST-depression integral was 4.15 +/- 1.2 and 7.10 +/- 1.65 in 2nd minute in group I and group II respectively, and the difference was statistically significant in 2nd, 7th (p < 0.05) and 8th minute (p < 0.01) of recovery. These changes are important in interpretation of results of exercise testing.
在这项关于压力测试的研究中，患者所处的姿势对心率、血压、心率血压乘积以及恢复阶段的ST段压低积分有影响。压力测试恢复阶段的收缩压，从第2分钟到第5分钟，坐姿（第一组）比躺姿（第二组）更快地向运动前正常水平下降（p<0.05）。躺姿时心率的变化比坐姿时更小且更缓慢。从恢复的第2分钟到第5分钟，作为心肌需氧量决定因素的心率血压乘积（RPP）下降，躺姿比坐姿更低（p<0.05）。因此，作为缺血标志物的ST段压低，躺姿比坐姿更明显。第一组和第二组在第2分钟时ST段压低积分分别为4.15±1.2和7.10±1.65，在恢复的第2分钟、第7分钟（p<0.05）和第8分钟（p<0.01）差异具有统计学意义。这些变化对运动测试结果的解读很重要
