[The effect of AR-L 115 BS on contractility dynamics of the isolated, metabolically supported dog heart (author's transl)].
In this study the contractility dynamics of the left ventricle are analysed independent of respiration, pre- and afterload, heart rate and perfusion pressure. These parameters alter varyingly following the administration of 2-[(2-methoxy-4-methylsufinyl)phenyl]-1H-imidazo[4,5-b]pyridine (AR-L 115 BS) so that the study plan selected must take these factors into account. The model employed consisted of a metabolically supported isolated pulsating dog's heart. The dose of AR-L 115 Bs used was 0.125 mg/kg body weight and it was infused over a period of 30 min. Altogether the study demonstrates that AR-L 115 BS has a marked positive inotropic effect on the isolated heart even under the conditions of infusion. The coronary resistance diminishes and the cardiac output increases.
D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002316:Cardiotonic Agents / Q000494:pharmacology*; D003326:Coronary Circulation / Q000187:drug effects; D004285:Dogs; D004734:Energy Metabolism / Q000187:drug effects; D006321:Heart / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects*; D007093:Imidazoles / Q000494:pharmacology*; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects*; D009206:Myocardium / Q000378:metabolism
D002316:Cardiotonic Agents; D007093:Imidazoles; C029758:sulmazole
Die Wirkung von AR-L 115 BS auf die Kontraktionsdynamik des isolierten, metabolisch unterstützten Hunde-Herzens.