نتایج جستجو برای: heart rate variability signal

تعداد نتایج: 1762530  

Journal: :Acupuncture in medicine : journal of the British Medical Acupuncture Society 2011
Terje Alraek Can Ozan Tan

A.K. Wadhwani Shweta Agarwal,

In this paper the main objective is to quantify and compare the instantaneous value of heart rate for normal breathing patterns during Meditation and Non Meditation conditions. This paper involves Analysis of Variance (ANOVA) technique for the analysis of the heart rate variability patterns during the meditative and non meditative states. The analysis is divided into three stages i.e. data acqu...

Journal: :Clinical science 1996
L A Fleisher S M Frank D I Sessler C Cheng T Matsukawa C A Vannier

1. Heart rate variability is modulated by multiple control systems, including autonomic and hormonal systems. Long-term variability, i.e. the very low-frequency band of the power spectra, has been postulated to reflect thermoregulatory vasomotor control, based upon thermal entrainment experiments. However, the relationship between thermoregulatory responses (vasoconstriction and shivering) and ...

2001
Sokol Saliu Ahmet Birand Gulmira Kudaiberdieva

In this paper, we have proposed vocalization of heart rate variability (HRV) as a perceptual analysis tool. We adapted a phonation-production model to encode external signals and generate audible representations of them. HRV changes, caused by induced perturbations to the autonomous nervous system, could be perceived on vocalized HRV. Keywords— Heart rate variability, voice perturbations, voice...

2010
Z. Piotrowski K. Różanowski

We present algorithm for Heart Rate detection based on Short-Term Autocorrelation Center Clipping method. This algorithm is dedicated for biological signal detection, electrocardiogram, in noisy environment with lot of artifacts. Using this algorithm is also possible detect the R pointers in the PQRST complex of the ECG signal. In this paper the new implementation of the heart rate variability ...

2015
COSMIN GRAD

BACKGROUND AND AIM Heart rate (HR) can appear static and regular at rest, during exercise or recovery after exercise. However, HR is constantly adjusted due to factors such as breathing, blood pressure control, thermoregulation and the renin-angiotensin system, leading to a more dynamic response that can be quantified using HRV (heart rate variability). HRV is defined as the deviation in time b...

2011
Ramesh Kumar Sunkaria

The heart rate variability (HRV) signal carries important information about the systems controlling the heat rate, mainly elicited by autonomic nervous system (sympathetic and parasympathetic) controls. The analysis of HRV signal with existing linear techniques based on fast Fourier transform and autoregressive model have the disadvantages of lower sensitivity and positive predictive value of <...

Journal: :Archives of disease in childhood 2000
M M Massin K Maeyns N Withofs F Ravet P Gérard

BACKGROUND Measurements of heart rate variability (HRV) are increasingly used as markers of cardiac autonomic activity. AIM To examine circadian variation in heart rate and HRV in children. SUBJECTS A total of 57 healthy infants and children, aged 2 months to 15 years, underwent ambulatory 24 hour Holter recording. Monitoring was also performed on five teenagers with diabetes mellitus and s...

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