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Related Experiment Videos

The normal response to prolonged passive head up tilt testing.

M E Petersen1, T R Williams, C Gordon

  • 1Department of Cardiology, Chelsea and Westminster Hospital, 369 Fulham Road, London SW10 9NH, UK. drmev.peterson@virgin.net

Heart (British Cardiac Society)
|October 20, 2000
PubMed
Summary
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False positive results are common in head up tilt testing for healthy adults. This challenges current diagnostic criteria for abnormal non-syncopal outcomes, impacting syncope diagnosis.

Area of Science:

  • Cardiology
  • Physiology

Background:

  • Head up tilt testing is a common diagnostic tool.
  • Understanding normal responses is crucial for accurate syncope diagnosis.

Purpose of the Study:

  • To define normal head up tilt test responses in healthy adults.
  • To assess the frequency of vasovagal syncope in a normal population.

Main Methods:

  • 127 healthy adults underwent 60-degree head up tilt testing.
  • Continuous, non-invasive beat-to-beat blood pressure and heart rate monitoring were used.

Main Results:

  • 13% of subjects experienced vasovagal syncope.
  • Age and sex did not influence outcomes.
  • Normal subjects showed age-related heart rate and blood pressure variations.

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Conclusions:

  • Head up tilt testing frequently yields false positive results in healthy individuals.
  • Established criteria for abnormal non-syncopal outcomes may be invalidated by normal physiological responses.