Linked Life Data

6627276

Source:http://linkedlifedata.com/resource/pubmed/id/6627276

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1983-12-17
pubmed:abstractText
Hearts of rats made hypertensive (BP greater than 150 mmHg) by left renal artery clipping and sham operated controls were studied in two series of experiments. In series I, cardiac function was studied in an isolated working heart apparatus at weeks 4, 9 to 10 and 16 to 17 post-surgery. In series II, coronary flow was studied during normoxic and anoxic retrograde perfusions at days 6 to 9 and at weeks 4 and 10 post-surgery. In series I, when compared with controls, hypertensives had lower body weights at weeks 4 and 9 to 10, and higher left ventricular weights at each period. Heart function was depressed for hypertensives when compared with controls as measured by lower stroke volume, peak left ventricular systolic pressure, stroke work, ejection fraction, positive dP/dt, peak aortic flow, and maximal flow acceleration. Relaxation rate as measured by negative dP/dt was also depressed. Hearts from hypertensives had significantly lower coronary flows and MVO2, and increased percent oxygen extraction and effluent lactate/pyruvate ratios. LVEDP was significantly elevated for hypertensives, when LVEDV (ml) was similar for hypertensives and controls. Myocardial actomyosin ATPase activity was depressed for hypertensives at weeks 9 to 10 and 16 to 17 post-surgery. In series II, when hearts were perfused retrogradely, coronary flow was lower for hypertensives than for controls during normoxia at days 6 to 9 and at week 4, and during anoxia at all time periods. The findings demonstrate that impaired coronary vascular reserve develops within days of the development of hypertension in rats, and this can be associated with impaired ventricular function.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0008-6363
pubmed:author
pubmed:issnType
Print
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
553-61
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
Impaired coronary flow and ventricular function in hearts of hypertensive rats.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.