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 Ageingjournal_title
Age and ageingauthors
McIntosh SJ,Lawson J,Kenny RAdoi
10.1093/ageing/23.4.317subject
Has Abstractpub_date
1994-07-01 00:00:00pages
317-9issue
4eissn
0002-0729issn
1468-2834journal_volume
23pub_type
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