title: [Prenalterol (CGP 7760 B), a new cardioselective beta 1-adrenoceptor-agonist (author's transl)].
abstract: The haemodynamic effects of the new selective beta 1-receptor-agonist prenalterol were investigated in two groups each of 8 patients. Dosages of 500 microgram/5 min and 100 microgram/1 min were given after direct closure of atrial septal defect under neuroleptanalgesia. Prenalterol 500 microgram/5 min increased cardiac index (37.5%), heart rate (19%), stroke index (16.2%), mean arterial pressure (26.5%) and dp/dtmax (84.5%) significantly. Total systemic resistance, total pulmonary vascular resistance and mean pulmonary pressure remained constant. Filling pressures of both ventricles decreased slightly but significantly. Maximal hemodynamic changes after infusion of 100 microgram/1 min prenalterol were half as great as with 500 microgram/5 min and occurred 3 min earlier. The haemodynamic action of prenalterol was rather long lasting. One hour after cessation of the drug-infusion there were still detectable haemodynamic effects. In contrast to investigations in awake patients there was a greater increase in heart rate, which is referred to influences on the vagal reflex caused by anaesthesia.
mesh_terms: D000319:Adrenergic beta-Antagonists; D000328:Adult; D001794:Blood Pressure / Q000187:drug effects; D002306:Cardiac Volume / Q000187:drug effects; D002316:Cardiotonic Agents; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D008297:Male; D011217:Practolol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D011294:Prenalterol; D014655:Vascular Resistance / Q000187:drug effects
chemical_list: D000319:Adrenergic beta-Antagonists; D002316:Cardiotonic Agents; D011294:Prenalterol; D011217:Practolol
vernacular_title: Prenalterol (CGP 7760 B), ein neuer kardioselektiver beta 1-Rezeptoren-Agonist.