Intravenous cannulation alters the specificity of head-up tilt testing for vasovagal syncope in elderly patients.

Abstract:

:Prolonged head-up tilt is increasingly used as a diagnostic test for vasovagal syncope. Its sensitivity is reported to increase with the concurrent administration of intravenous isoprenaline. False-positive responses are common in young controls particularly following intravascular instrumentation. We studied the influence of intravenous cannulation alone on responses to head-up tilt in ten healthy elderly subjects. All remained asymptomatic during tilt when non-cannulated whilst five developed symptomatic hypotension following cannulation. Thus, intravascular instrumentation influences responses to held-up tilt in elderly subjects; the significance of positive responses obtained using intravenous isoprenaline in this age group requires further evaluation.

journal_name

Age Ageing

journal_title

Age and ageing

authors

McIntosh SJ,Lawson J,Kenny RA

doi

10.1093/ageing/23.4.317

subject

Has Abstract

pub_date

1994-07-01 00:00:00

pages

317-9

issue

4

eissn

0002-0729

issn

1468-2834

journal_volume

23

pub_type

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