title: [The pulmonary hemodynamic changes under experimental myocardial ischemia in rabbits following beta-adrenoreceptors blockade].
abstract: In acute experiments in anesthetized rabbits, changes of the pulmonary hemodynamics following myocardial ischemia in the region of the descendent left coronary artery were studied as well as in control animals and after the blockade of beta-adrenoreceptors. The myocardial ischemia decreased the left ventricular myocardial contractility, cardiac output and arterial pressure, decreased the pulmonary artery pressure and flow. Following myocardial ischemia, the pulmonary artery pressure decreased less than pulmonary artery blood flow as the result of elevating of the left atrial pressure, meanwhile pulmonary vascular resistance was not changed. Following myocardial ischemia in animals after the blockade of the beta-adrenoreceptors, the pulmonary flow decreased the same as in control animals. However, the pulmonary artery pressure was decreased twofold more significantly than in control animals, and its diminishing was in the same degree as the pulmonary artery flow. Following myocardial ischemia after the blockade of the beta-adrenoreceptors, the pulmonary vascular resistance decreased whereas the left atrial pressure did not change significantly because the myocardial contractility decreased less than in control animals.
authors.forename: V I
authors.initials: VI
authors.lastname: Evlakhov
authors.forename: I Z
authors.initials: IZ
authors.lastname: Poiasov
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000494:pharmacology*; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002302:Cardiac Output / Q000187:drug effects; D054059:Coronary Occlusion / Q000503:physiopathology*; D006352:Heart Ventricles / Q000187:drug effects* / Q000503:physiopathology; D006439:Hemodynamics / Q000187:drug effects; D023421:Models, Animal; D009200:Myocardial Contraction / Q000187:drug effects; D017202:Myocardial Ischemia / Q000503:physiopathology*; D011433:Propranolol / Q000494:pharmacology*; D011651:Pulmonary Artery / Q000503:physiopathology*; D011817:Rabbits; D011943:Receptors, Adrenergic, beta / Q000378:metabolism; D014655:Vascular Resistance
chemical_list: D000319:Adrenergic beta-Antagonists; D011943:Receptors, Adrenergic, beta; D011433:Propranolol