Premium
Direct effects of platelet activating factor (PAF) on cardiac function in isolated guinea pig heart
Author(s) -
Tanniére Marianne,
Rochette Luc
Publication year - 1987
Publication title -
drug development research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.582
H-Index - 60
eISSN - 1098-2299
pISSN - 0272-4391
DOI - 10.1002/ddr.430110305
Subject(s) - platelet activating factor , medicine , cardiology , guinea pig , cardiac function curve , heart rate , heart failure , blood pressure
Abstract The direct effects of platelet activating factor (PAF) (2.5 nM) on isolated guinea pig heart were studied: first, on Langendorff model perfused hearts, using the radiolabelled microspheres technique, we found that PAF reduced the myocardial flow homogenously. Secondly, using isolated “working” heart preparations, the direct effects of PAF on the coronary and aortic flows, heart rate, and systolic ejection volume were evaluated. PAF markedly reduced coronary and aortic flows. Systolic ejection volume (SEV) was significantly decreased and the reduction, which was maximal at 3 min, persisted at 20 min. Some of the direct cardiac effects of PAF were antagonized by addition of GBE to the medium (10 mg/l). These data demonstrate the direct effects of PAF on cardiac function. The possible of PAF in the mediation of the episodes of coronary spasm may be suggested.