title: Haemodynamic changes after spinal cord transection are anaesthetic agent dependent.
abstract: 1 To evaluate the effect of high spinal cord transection (SCT), between T4 and T5, on the mean arterial pressure (MAP) and heart rate in animals anaesthetized with different anaesthetic agents: ether (n = 12), 20% urethane, 1.2 g kg(-1) (n = 12), 2% tri-bromide-ethanol, 200 mg kg(-1) (n = 12); chloral hydrate and urethane, 75 and 525 mg kg(-1) respectively (n = 12). 2 In the animals anaesthetized with ether or urethane, SCT caused an immediate major drop in MAP, with hypotension and bradycardia throughout the next 10 min. In the animals anaesthetized with urethane + chloralose or tri-bromide-ethanol, SCT transiently increased MAP with subsequent hypotension and bradycardia. 3 In summary, the haemodynamic changes after complete, high SCT are anaesthetic agent dependent. Further research about the exact mechanisms responsible for these diverse autonomic changes is warranted.
authors: Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceará, Rua Cel Nunes de Melo, 1127 CP 3157 Fortaleza, Ceará 60430 270, Brazil.
authors: P R
authors: PR
authors: Leal
authors: R C
authors: RC
authors: Lima
authors: A C
authors: AC
authors: Lopes
authors: J R V
authors: JR
authors: da Graça
authors: A A
authors: AA
authors: Santos
authors: F H
authors: FH
authors: Rola
authors: F de A A
authors: Fde A
authors: Gondim
mesh_terms: D000777:Anesthetics / Q000494:pharmacology*; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects* / Q000502:physiology; D006339:Heart Rate / Q000187:drug effects* / Q000502:physiology; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D013119:Spinal Cord Injuries / Q000503:physiopathology*; D013904:Thoracic Vertebrae
chemical_list: D000777:Anesthetics