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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
|
| pubmed:dateCreated |
1990-4-17
|
| pubmed:abstractText |
The aim of the present study was to investigate the effects of a pretest redistribution of blood volume and of a change in the neurohumoral condition on the blood pressure (BP) and heart rate (HR) responses to three commonly used cardiovascular reflex tests: standing up, forced breathing, and the Valsalva maneuver in 10 healthy male subjects. Base-line conditions were altered by changing posture and the duration of rest preceding the test stimulus. A continuous recording of finger BP was obtained noninvasively by a Finapres. The main observations from this study are with respect to standing up: lengthening the period of preceding rest from 1 to 20 min enlarges the initial BP (systolic/diastolic) decrease (from 8 +/- 10/9 +/- 4 to 27 +/- 8/19 +/- 4 mmHg, P less than 0.01) and the subsequent BP overshoot (from 17 +/- 10/12 +/- 7 to 31 +/- 10/18 +/- 7 mmHg, P less than 0.05); to forced breathing: inspiratory-expiratory changes in BP but not in HR are larger in the upright posture (P less than 0.05); and to the Valsalva maneuver: change in posture from supine to standing increases the phase II BP decrease (from 18 +/- 12/8 +/- 6 to 45 +/- 16/21 +/- 9 mmHg), phase IV systolic BP overshoot (from 26 +/- 16 to 71 +/- 17 mmHg), delta HRmax (from 30 +/- 10 to 47 +/- 12 beats/min), and the Valsalva ratio (HRmax/HRmin), from 2.0 +/- 0.3 to 2.6 +/- 0.7, all significant at P less than 0.01.(ABSTRACT TRUNCATED AT 250 WORDS)
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Jan
|
| pubmed:issn |
8750-7587
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
68
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
147-53
|
| pubmed:dateRevised |
2004-11-17
|
| pubmed:meshHeading |
pubmed-meshheading:2312453-Adult,
pubmed-meshheading:2312453-Arrhythmia, Sinus,
pubmed-meshheading:2312453-Blood Pressure,
pubmed-meshheading:2312453-Forced Expiratory Flow Rates,
pubmed-meshheading:2312453-Heart Rate,
pubmed-meshheading:2312453-Humans,
pubmed-meshheading:2312453-Male,
pubmed-meshheading:2312453-Posture,
pubmed-meshheading:2312453-Reflex,
pubmed-meshheading:2312453-Rest,
pubmed-meshheading:2312453-Valsalva Maneuver
|
| pubmed:year |
1990
|
| pubmed:articleTitle |
Assessment of cardiovascular reflexes: influence of posture and period of preceding rest.
|
| pubmed:affiliation |
Department of Medicine, Academic Medical Centre, Amsterdam, The Netherlands.
|
| pubmed:publicationType |
Journal Article
|