Why the study?
Do non-invasive tests of cardiovascular reflex function identify abnormal reflex control in patients with unexplained syncope?
Population
67 patients complaining of recurrent syncopal attacks but with no apparent cause
Comparison
Head-up tilting and carotid baroreceptor… vs Age-related control subjects
Design
Case-control
Follow-up
up to 1 hour (test duration)
Authors
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Noninvasive baroreflex testing may distinguish blunted responses in postural hypotension; supports reflex phenotyping in unexplained syncope but leaves clinical utility open.
Do non-invasive tests of cardiovascular reflex function identify abnormal reflex control in patients with unexplained syncope?
Non-invasive cardiovascular reflex testing can phenotype patients with unexplained syncope into those with blunted reflexes (postural hypotension) and those with overactive reflexes (vasovagal syncope).
Wahbha et al. (1989) studied this question.
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