Linked Life Data

2721119

Source:http://linkedlifedata.com/resource/pubmed/id/2721119

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1989-6-30
pubmed:abstractText
1. Two patients are described who presented with orthostatic hypotension as the main symptom. The diagnosis was sympathetic failure with intact vagal control. 2. Unusual test results were obtained. Assessment of the integrity of the total baroreflex arc by the Valsalva manoeuvre measuring only heart rate changes proved impossible, since the magnitude and time course of the heart rate response were normal notwithstanding the presence of a blood pressure response typical of sympathetic failure. 3. Sustained handgrip, cold pressor test and mental stress test all could induce a rise in blood pressure, despite the presence of sympathetic vasomotor lesions, but only when accompanied by a rise in heart rate. Efferent parasympathetic blockade by atropine, resulting in an increase in heart rate, was also accompanied by a substantial rise in blood pressure. These findings seem to result from a heart rate rise dependent increase in cardiac output unopposed by reflex vasodilatation. 4. In these patients the only baroreflex way to control blood pressure is by varying heart rate. This condition can be evaluated only if blood pressure and heart rate are measured on a beat-by-beat basis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0143-5221
pubmed:author
pubmed:issnType
Print
pubmed:volume
76
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
523-8
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Pitfalls in the assessment of cardiovascular reflexes in patients with sympathetic failure but intact vagal control.
pubmed:affiliation
Department of Medicine, University of Amsterdam, The Netherlands.
pubmed:publicationType
Journal Article, Clinical Trial, Controlled Clinical Trial