Head-up tilt table test: How far and how long?

Ramesh Khurana, E. M. Nicholas

Research output: Contribution to journalArticle

Abstract

There is great variation between laboratories in the angle and duration of tilt used in the head-up tilt table test. We compared the hemodynamic response to three sequential randomized 20-min tilts of 60°, 80° and 90° in 20 normal subjects. We studied 66 patients to determine the duration of tilt needed to document three types of orthostatic intolerance. Blood pressure and heart rate were monitored non-invasively. Thirty-nine patients with orthostatic hypotension of diverse causes and 17 patients with orthostatic tachycardia plus were tilted to 90° for 10 min. Ten patients with vasovagal syncope were tilted to 90° for 30 min. A muitivariate analysis of variance performed to assess the hemodynamic responses to 60°, 80° and 90° tilts did not show a statistically significant difference (F = 0.459). Logistic regression analyses revealed that the duration of tilt required to document orthostatic hypotension was 5 min (73% cases correctly identified), orthostatic tachycardia plus 10 min (86.5% cases correctly identified) and neurally mediated syncope 10 min (86.5% cases correctly identified). Tilt duration is a more important variable than tilt angle and the duration of the tilt should depend on the suspected cause of orthostatic intolerance.

Original languageEnglish (US)
Pages (from-to)335-341
Number of pages7
JournalClinical Autonomic Research
Volume6
Issue number6
DOIs
Publication statusPublished - Dec 1 1996
Externally publishedYes

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Keywords

  • Duration of tilt
  • Head-up tilt
  • Hemodynamic response
  • Tilt angles

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)
  • Endocrine and Autonomic Systems

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