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	Provedor de dados BJMBR (2) Autor Fazan Jr.,R. (1) Machado,B.H. (1) Salgado,H.C. (1) Palavra-chave Aortic coarctation (2) Hypertension (2) Angiotensin (1) Aortic resistance (1) Doppler flowmetry (1) Reflex bradycardia (1) Renal afferences (1) Sinoaortic denervation (1) Vasopressin (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Info:eu-repo/semantics/other (1) Ano 1997 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Hemodynamic responses to acute aortic coarctation in conscious sinoaortic denervated rats BJMBR Fazan Jr.,R.; Machado,B.H.; Salgado,H.C.. The hemodynamic responses to acute (45 min) partial aortic constriction were studied in conscious intact (N = 7) or sinoaortic denervated (SAD) adult male Wistar rats (280-350 g, N = 7) implanted with carotid and femoral arterial catheters, a pneumatic cuff around the abdominal aorta and a pulsed Doppler flow probe to measure changes in aortic resistance. In addition, the hypertensive response and the reflex bradycardia elicited by total (N = 8) vs partial (N = 7) aortic constriction (monitored by maintenance of the pressure distal to the cuff at 50 mmHg) were compared in two other groups of intact rats. Intact rats presented a smaller hypertensive response (26 to 40% above basal level) to partial aortic constriction than SAD rats (38 to 58%). The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypertension; Aortic coarctation; Doppler flowmetry; Aortic resistance; Reflex bradycardia; Sinoaortic denervation. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001000018 Vasopressor mechanisms in acute aortic coarctation hypertension BJMBR Angiotensin II (ANG II) and vasopressin (AVP) act together with the mechanical effect of aortic constriction in the onset of acute aortic coarctation hypertension. Blockade of ANG II and AVP V1 receptors demonstrated that ANG II acts on the prompt (5 min) rise in pressure whereas AVP is responsible for the maintenance (30-45 min) of the arterial pressure elevation during aortic coarctation. Hormone assays carried out on blood collected from conscious rats submitted to aortic constriction supported a role for ANG II in the early stage and a combined role for both ANG II and AVP in the maintenance of proximal hypertension. As expected, a role for catecholamines was ruled out in this model of hypertension, presumably due to the inhibitory effect of the... Tipo: Info:eu-repo/semantics/other Palavras-chave: Aortic coarctation; Vasopressin; Angiotensin; Renal afferences; Hypertension. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000400003 Registros recuperados: 2 Primeira ... 1 ... Última

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