Linked Life Data

533742

Source:http://linkedlifedata.com/resource/pubmed/id/533742

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1980-3-17
pubmed:abstractText
There is ample evidence that posture affects many cardiorespiratory variables, but the extent to which secondary reflex mechanisms complement or oppose the primary gravity effect is not clear. We have addressed ourselves to this problem by studying five normal volunteers, passively tilted from the supine to the upright position in 15 degrees increments, in random sequence, determinging cardiac output (Q), heart rate (HR), stroke volume (SV), minute and alveolar ventilation (VE and VA), functional residual capacity (FRC), and arterial-end-tidal PCO2 pressure difference. In each position, four to five measurements were obtained by noninvasive techniques. Changes in Q and in FRC were linearly related to the sine of the tilt angle, indicating that reflexes were either absent or that their net effect was proportional to the effects of gravity; this was clearly not the case for other variables (HR, SV, VE, VA) in which it was possible to demonstrate threshold values for the appearance of secondary changes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0161-7567
pubmed:author
pubmed:issnType
Print
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
503-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1979
pubmed:articleTitle
Cardiopulmonary readjustments in passive tilt.
pubmed:publicationType
Journal Article, Clinical Trial, Research Support, U.S. Gov't, Non-P.H.S., Randomized Controlled Trial