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Comparison of the active standing test and head-up tilt test for diagnosis of syncope in childhood and adolescence

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Abstract

We examined 51 children and adolescents with orthostatic symptoms using two orthostatic tests, the active standing test (the AS test) and head-up tilt test (HUT), and compared circulatory responses, autonomic function in addition to the induction rate of syncope during short-time orthostasis. Syncope was induced in eight patients with both tests, in only six patients with the AS test and in only one patient with HUT. The induction rate was significantly higher with the AS test (p<0.0001). In addition, the AS test is common and daily postural motion and does not require a tilt table. We calculated percent changes in systolic blood pressure at the initial drop (ΔID-SBP), in systolic blood pressure (ΔSBP), in diastolic blood pressure (ΔDBP), in heart rate (ΔHR), component coefficient variation LF/HF (ΔLF/HF) from supine to upright. ΔHR were significantly larger in fainters than in non-fainters with both tests, although there was no difference in ΔSBP and in ΔDBP. In six fainters only with the AS test, ΔHR was significantly larger with the AS test than with HUT. With the AS test ΔID-SBP were correlative with ΔLF/HF, and ΔLF/HF were correlative with ΔHR, whereas these relations were not clear in HUT. These results indicated the AS test caused cardiac sympathetic activation associated with an initial pressure drop, and was more prone to induce syncope with a greater HR increase in some patients. We conclude the AS test is as potential as HUT as a diagnostic test for syncope.

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Authors and Affiliations

  1. Dept. of Pediatrics, Daiichi-Towakai Hospital, Miyano-cho 2–17, Takatsuki-shi, Osaka, Japan, 569–0081

    Reiko Matsushima M.D.

  2. Dept. of Pediatrics, Osaka Medical College, Takatsuki, Osaka, Japan

    Hidetaka Tanaka M.D. & Hiroshi Tamai M.D.

Authors
  1. Reiko Matsushima M.D.
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  2. Hidetaka Tanaka M.D.
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  3. Hiroshi Tamai M.D.
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Correspondence to Reiko Matsushima M.D..

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Matsushima, R., Tanaka, H. & Tamai, H. Comparison of the active standing test and head-up tilt test for diagnosis of syncope in childhood and adolescence. Clin Auton Res 14, 376–384 (2004). https://doi.org/10.1007/s10286-004-0182-2

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  • DOI: https://doi.org/10.1007/s10286-004-0182-2

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