Linked Life Data

15993879

Source:http://linkedlifedata.com/resource/pubmed/id/15993879

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2005-7-12
pubmed:abstractText
The prostaglandin I2 analogues epoprostenol and iloprost increase left ventricular contractility. Therefore, we hypothesize that the prostaglandin I2 analogues epoprostenol and iloprost improve also left ventricular diastolic function. To test this hypothesis, the effects of epoprostenol and iloprost on left ventricular diastolic function were assessed in vivo and compared to two vasodilators sodium nitroprusside and adenosine, not formerly associated with changes of left ventricular contractility. Eleven pigs (25.9+/-2.8 kg, balanced anaesthesia) were exposed to the short-acting intravenous vasodilators sodium nitroprusside, adenosine and epoprostenol in a randomized cross over design. The long-acting iloprost was administered at the end of the protocol. The drugs are titrated to achieve a 25% reduction of diastolic aortic pressure. Active isovolumic relaxation properties of the left ventricle were assessed by the maximum velocity of left ventricular pressure drop. Passive phase of relaxation and filling was assessed by the determination of end diastolic compliance during a preload reduction manoeuvre. The maximum velocity of left ventricular pressure drop worsened during the infusion of sodium nitroprusside (baseline: -1950; sodium nitroprusside: -1293 mm Hg/s, p<0.05, Wilcoxon signed rank test versus vs. baseline) and adenosine (baseline: -2015; adenosine: -1345 mm Hg/s, p<0.05), but remained stable during the infusion of the prostaglandins (baseline: -1943; epoprostenol: -1785 mm Hg/s; baseline: -2042; iloprost: -1923 mm Hg/s). End diastolic compliance was not altered significantly by any vasodilator. Interstitial myocardial cAMP increased during the infusion of epoprostenol (7.60 to 13.87 fmol/ml, p<0.05) and tended to increase during the infusion of iloprost (7.56 to 11.66 fmol/ml, p=0.21). The prostaglandin I(2) analogues epoprostenol and iloprost preserved the early phase of active isovolumic relaxation, presumably mediated by myocardial cAMP, whereas sodium nitroprusside and adenosine impaired early active isovolumic relaxation. Passive relaxation and filling properties remained stable during the infusion of each applied vasodilator in the intact left ventricle in vivo.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0014-2999
pubmed:author
pubmed:issnType
Print
pubmed:day
11
pubmed:volume
517
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
208-16
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:15993879-Adenosine, pubmed-meshheading:15993879-Animals, pubmed-meshheading:15993879-Antihypertensive Agents, pubmed-meshheading:15993879-Blood Pressure, pubmed-meshheading:15993879-Cyclic AMP, pubmed-meshheading:15993879-Diastole, pubmed-meshheading:15993879-Epoprostenol, pubmed-meshheading:15993879-Heart Rate, pubmed-meshheading:15993879-Heart Ventricles, pubmed-meshheading:15993879-Iloprost, pubmed-meshheading:15993879-Infusions, Intravenous, pubmed-meshheading:15993879-Nitroprusside, pubmed-meshheading:15993879-Random Allocation, pubmed-meshheading:15993879-Swine, pubmed-meshheading:15993879-Systole, pubmed-meshheading:15993879-Time Factors, pubmed-meshheading:15993879-Vasodilator Agents, pubmed-meshheading:15993879-Ventricular Function, pubmed-meshheading:15993879-Ventricular Function, Left
pubmed:year
2005
pubmed:articleTitle
Effect of prostaglandin I2 analogues on left ventricular diastolic function in vivo.
pubmed:affiliation
Clinic of Anesthesiology, Ludwig Maximilian University, Marchioninistr. 15, D-81377 Munich, Germany. Hille.Kisch-Wedel@med.uni-muenchen.de
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't