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Autonomic nervous system dysfunction in children with severe tetanus: dissociation of cardiac and vascular sympathetic control BJMBR
Mazzei de Davila,C.A.; Davila,D.F.; Donis,J.H.; Gonzalo,X..
The medical records of ten pediatric patients with a clinical diagnosis of tetanus were reviewed retrospectively. The heart rate and blood pressure of all tetanus patients were measured noninvasively every hour during the first two weeks of hospitalization. Six of ten tetanus patients presented clinical evidence of sympathetic hyperactivity (group A) and were compared with a control group consisting of four children who required mechanical ventilation for diseases other than tetanus (group B). Heart rate and blood pressure simultaneously and progressively increased to a maximum by day 7. The increase over baseline was 43.70 ± 11.77 bpm (mean ± SD) for heart rate (P<0.01) and 38.60 ± 26.40 mmHg for blood pressure (P<0.01). These values were higher and...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Tetanus patients; Sympathetic control; Autonomic dysfunction; Blood pressure; Heart rate.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000600018
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Heart rate changes during the Valsalva maneuver in patients with isolated aortic insufficiency BJMBR
Navarro,A.E.; Dávila,D.F.; Torres,A.; Bellabarba,G.; Donis,J.H.; Casado,J..
To determine the possible relationship between left ventricular dilatation and heart rate changes provoked by the Valsalva maneuver (Valsalva ratio), we studied 9 patients with isolated chronic aortic insufficiency. Left ventricular systolic function was assessed by two-dimensional echocardiography and cardiac catheterization. All patients were asymptomatic (functional class I of the New York Heart Association). The left ventricular internal diameters and volumes were significantly increased in all patients. The asymptomatic patients had either normal or slightly depressed ejection fraction (EF&gt;0.40). The Valsalva ratio of these asymptomatic patients showed no significant correlation with the left ventricular volumes or with the left ventricular...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Valsalva maneuver; Parasympathetic nervous system; Left ventricular systolic function; Chronic aortic insufficiency; Ejection fraction.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000900005
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