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Heart rate dynamics during a treadmill cardiopulmonary exercise test in optimized beta-blocked heart failure patients
(Faculdade de Medicina / USP, 2008)
BACKGROUND: Calculating the maximum heart rate for age is one method to characterize the maximum effort of an individual. Although this method is commonly used, little is known about heart rate dynamics in optimized ...
Heart-rate variability in low-risk prematurely born infants reaching normal term: A comparison with full-term newborns
(1993)
To investigate the influence of prematurity and postnatal age on the maturation of the autonomic nervous system function, we analysed heart-rate and heart-rate variability in twelve prematurely born infants (<37 weeks ...
Modificacoes na ação mecânica do coração isolado de cobaia por doses de propafenon capazes de alterar o eletrocardiograma
(1979-12-01)
Inotropic effects of Propafenon were studied in isovolumic isolated guinea pig hearts submitted to infusion of the drug during 10 minutes. The dosages utilized caused: bradycardia, depression of AV nodal conduction and QRS ...
Effects on The Heart Rate Variability Induced by Peripheral and Central Hypertonic Saline Infusions
(Lippincott Williams & Wilkins, 2011-11-01)
The relationship between heart rate reserve and oxygen uptake reserve in heart failure patients on optimized and non-optimized beta-blocker therapy
(Faculdade de Medicina / USP, 2008)
BACKGROUND: The relationship between the percentage of oxygen consumption reserve and percentage of heart rate reserve in heart failure patients either on non-optimized or off beta-blocker therapy is known to be unreliable. ...