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. 2015 Nov 25;310(3):H416–H425. doi: 10.1152/ajpheart.00583.2015

Fig. 1.

Fig. 1.

Orthostatic changes in systolic blood pressure (SBP; A), diastolic blood pressure (DBP; B), and heart rate (HR; C) upon head-up tilt (HUT) testing in children. SBP and DBP were significantly higher in subjects with a normal response to HUT [HUT(−) subjects (n = 18)] than in subjects with an abnormal response to HUT [HUT(+) subjects (n = 30)] during HUT. HUT(−) subjects had a significant increase in DBP and HR from the supine position to HUT. HUT(+) subjects had a significant increase in HR from the supine position to HUT but no change in DBP. Supine position vs. HUT: **P < 0.01 and ***P < 0.001; HUT(−) vs. HUT(+) subjects: ###P < 0.001.