title: Haemodynamic effects of hyoscine-N-butylbromide in ponies.
abstract: The haemodynamic effects of hyoscine-N-butylbromide (0.30 mg/kg, intravenously) were studied in eight adult ponies in a blinded two-period crossover experiment with repeated measures. Values for heart rate were 63%, 48% and 13% greater than control values at 1, 16 and 46 min, respectively, after administration of hyoscine-N-butylbromide. Cardiac output increased by 16% at 16 min after drug injection. Mean right atrial pressure was decreased by 79%, 63%, 45% and 52% at 1, 16, 46 and 61 min, respectively, after drug administration. Stroke volume was decreased by 32% at 1 min and pulmonary arterial wedge pressure was decreased by 44% at 16 min. We detected no significant difference in mean systemic arterial pressure, mean pulmonary arterial pressure, systemic vascular resistance or pulmonary vascular resistance at any time.
authors.affiliation: Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853-6401, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Geimer
authors.forename: P M
authors.initials: PM
authors.lastname: Ekström
authors.forename: J W
authors.initials: JW
authors.lastname: Ludders
authors.forename: D F
authors.initials: DF
authors.lastname: Erichsen
authors.forename: R D
authors.initials: RD
authors.lastname: Gleed
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002086:Butylscopolammonium Bromide / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D002302:Cardiac Output / Q000187:drug effects; D018592:Cross-Over Studies; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects*; D006736:Horses / Q000502:physiology*; D007275:Injections, Intravenous; D011669:Pulmonary Wedge Pressure / Q000187:drug effects; D013318:Stroke Volume / Q000187:drug effects; D014655:Vascular Resistance / Q000187:drug effects
chemical_list: D002086:Butylscopolammonium Bromide