Arrhythmogenicity of dopamine and its effects on hemodynamics in dogs under halothane anesthesia

• Published in: Japanese journal of veterinary science Vol. 51; no. 2; pp. 396 - 402
• Main Authors: Sato, T. (Nippon Veterinary and Zootechnical Coll., Musashino, Tokyo (Japan)), Washizu, M, Kobayashi, K, Misaka, K, Hayashi, T, Orima, H, Motoyoshi, S
• Format: Journal Article
• Language: English; Japanese
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 01.04.1989
• Subjects: ANAESTHESIA; ANESTESIA; Anesthesia, Inhalation; ANESTHESIE; Animals; Arrhythmias, Cardiac - chemically induced; arrhythmogenicity; BLOOD PRESSURE; CARDIOVASCULAR SYSTEM; CATECHOLAMINE; CATECHOLAMINES; CATECOLAMINAS; CHIEN; COMPUTADOR; COMPUTERS; Diuresis - drug effects; dog; DOGS; dopamine; Dopamine - adverse effects; Dopamine - pharmacology; Dose-Response Relationship, Drug; EFFICACITE; EFFICIENCY; EFICACIA; Female; HALOTANO; HALOTHANE; hemo-dynamics; Hemodynamics - drug effects; Male; ORDINATEUR; PERRO; PRESION SANGUINEA; PRESSION SANGUINE; SISTEMA CARDIOVASCULAR; SYSTEME CARDIOVASCULAIRE
• ISSN: 0021-5295; 1881-1442
• DOI: 10.1292/jvms1939.51.396

The arrhythmogenicity of dopamine, its effects on cardiac function, hemodynamics, and diuresis under halothane anesthesia were evaluated in dogs. The induction time of arrhythemias and the effect of arrhythmias on cardiac function, hemodynamics, and diuresis were determined after infusion of dopamine for 30-min period at increasing doses of 3, 5, 7, 10, and 15 μg/kg/min. The results were as follows. 1. Arrhythmia induction percentage was 28.6% at 5 μg/kg/min, 42.9% at 7 μg/kg/min, 25% at 10 μg/kg/min, and 41.7% at 15 μg/kg/min. The induction time of arrhythemias (sec) was 459 at 5 μg/kg/min, 332 at 7 μg/kg/min, 152 at 10 μg/kg/min, and 279 at 15 μg/kg/min. No arrhythmias were present at 3 μg/kg/min. 2. Heart rate and myocardial oxygen consumption was increased in the arrhythmia-induced group compared to the non-arrhythmia-induced group. 3. Myocardial contractility, mean aortic pressure, mean pulmonary arterial pressure, and diuresis increased dose-dependently in the non-arrhythmia-induced group; however, these measures were increased in the arrhythmia-induced group without regard to dose.