Effects of catecholamines on volemic replacement with saline solution and the impact on heart rate variability in rabbits subjected to hemorrhage. A study by spectral analysis

• Autor(a) principal: Moraes,José Mariano Soares de
• Data de Publicação: 2014
• Outros Autores: Vane,Matheus Fachini, Rodrigues,Denise de Fátima, Mostarda,Cristiano Teixeira, Moraes,Thiago Soares Mendes Moreira de, Vane,Lucas Fachini, Ganem,Eliana Marisa, Cavalcanti,Ismar Lima, Módolo,Norma Sueli Pinheiro, Vane,Luiz Antonio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Acta Cirúrgica Brasileira (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502014001100703
• topic: Catecholamines; Adrenergic alpha-Agonists; adrenergic beta-Agonists; Blood Volume; Hemorrhage; Autonomic Nervous System; Rabbits

PURPOSE: To verify the effects of different catecholamines on volemic expansion and on the autonomic nervous system in rabbits that were subjected to hemorrhage.METHODS: Twenty four rabbits subjected to hemorrhage (with a 25% loss of blood volume) and were randomly divided into four experimental groups: 1) HEMO Group underwent replacement with their own blood in an equal volume; 2) SS Group underwent replacement with saline solution (SS) in a volume that corresponded to three times the removed blood volume; 3) ISP Group underwent replacement with SS and isoprenaline; 4) FNL Group underwent replacement with SS and phenylephrine. Spectral Analysis of the heart rate and heart rate variability were performed from the recorded data. Hematocrit was measured throughout the experiment.RESULTS:Replacement with SS and an α- or β-agonist did not produce differences in the intravascular retention compared to replacement with SS alone. An analysis of HRV showed that the FNL group maintained the LF/HF ratio better than ISP and SS.CONCLUSIONS: No difference in vascular retention when α- or β- agonists were added to SS during post-hemorrhagic recovery. The animals in the FNL group maintained the integrity of the autonomic response within normal physiological standards during hemorrhagic stress.