the aim of this study is to show that the measures derived from electrocardiogram (ecg) signals many a time perform better than the same measures obtained from heart rate (hr) signals. a comparison was made to investigate how far the nonlinear symbolic dynamics approach helps to characterize the nonlinear properties of ecg signals and hr signals, and thereby discriminate between normal and cong...

Paced breathing is a frequently performed technique for cardiovascular autonomic studies. The relative timing of inspiration and expiration during paced breathing, however, is not consistent. We, therefore, examined whether indexes of heart rate variability and spontaneous baroreflex sensitivity would be affected by the respiratory time ratio that is set. We studied 14 healthy young adults who ...

Labetalol (L), a drug with both aand fl-adrenoceptor blocking properties, was administered to 18 hypertensive patients for an average duration of 2.44 weeks, with an average final daily dose of 1.65 g. L decreased resting heart rate (HR) by 16% and maximal exercise HR by 21%; the phenylephrine-induced rise of brachial artery pressure (BAP) was reduced by 30-40%, and the rise of systemic vascula...

the purpose of this study was to determine and compare blood lactate, heart rate and blood pressure responses in arm and leg exercises and to determine the relationship between these variables and fatigue time during these two modes of exercises. 8 young professional karate players (mean age 18.90±2.20) volunteered to participate in this study. the subjects completed two ergometers: arm and leg...

Heart rate (HR) detection from ballistocardiogram (BCG) signals is challenging because the signal morphology can vary between and within-subjects. Also, it differs one sensor to another. Hence, essential evaluate HR algorithms across several datasets under different experimental setups. In this paper, we studied potential of three four independent BCG datasets. The are as follows: multiresoluti...

The aim of this study is to show that the measures derived from Electrocardiogram (ECG) signals many a time perform better than the same measures obtained from heart rate (HR) signals. A comparison was made to investigate how far the nonlinear symbolic dynamics approach helps to characterize the nonlinear properties of ECG signals and HR signals, and thereby discriminate between normal and cong...

Respiratory rate (RR) and rectal temperature (RT) of seven crossbred, second-litter sows and 11 crossbred gilts and rates of sitting and standing activity of 10 sows and gilts were measured from about 109 days of gestation to 5 days after farrowing at thermoneutral (T, 20.5 C) or hot (H, 29.8 C) ambient temperatures. Respiratory rate and RT were higher in heat-stressed sows and gilts (P~.05) be...

To examine whether age differentially modifies the physiological response to exercise in men and women, we performed gated radionuclide ventriculography with measurement of left ventricular volumes at rest and during peak upright cycle exercise in 200 rigorously screened healthy sedentary volunteers (121 men and 79 women) aged 22-86 yr from the Baltimore Longitudinal Study of Aging. At rest in ...

BACKGROUND Little is known about the metabolic and heart rate responses to a typical hatha yoga session. The purposes of this study were 1) to determine whether a typical yoga practice using various postures meets the current recommendations for levels of physical activity required to improve and maintain health and cardiovascular fitness; 2) to determine the reliability of metabolic costs of y...

OBJECTIVE To test the validity of ambulatory heart rate (HR) assessment with a cuff ambulatory blood pressure (ABP) monitor. DESIGN Cross-instrument comparison of HR measured intermittently by a cuff ABP monitor (SpaceLabs, Redmond, Washington, USA), with HR derived from continuous electrocardiogram (ECG) recordings (1) in a controlled laboratory experiment and (2) during long-term recording ...