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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 224 for “"HEART RATE VARIABILITY"”.
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Investigation of heart rate variability during sleep apnea
… on the autonomic nervous system, with prominent heart rate variation. It can be assumed that during sleep, internal influences (sympathetic and parasympathetic nervous system activities) dominate the autonomic nervous system; in addition repetitive apneas are accompanied by a pronounced increase …
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Quality of heart rate variability features obtained from ballistocardiograms
Heartbeat intervals (HBIs) vary over time, and that variance can be quantified as heart rate variability (HRV). HRV has several health-related applications including long-term health monitoring and sleep quality assessment. The focus of this research is obtaining HRV from ballistocardiograms …
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Heart rate variability in acute resistance training: monitoring recovery.
Un nivel suficiente de estímulo de entrenamiento y una adecuada recuperación tras el estrés producido por este facilita la mejora del rendimiento deportivo y la reducción de las lesiones. Sin embargo, la manipulación eficiente de la carga de entrenamiento y de los procesos de recuperación son …
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Heart Rate Variability analysis in patients undergoing local anesthesia
The analysis of Heart Rate Variability (HRV), the beat to beat fluctuation in the heart rate, is a non-invasive technique with a main aim in gaining information about the autonomic neural regulation of the heart. Assessment of HRV has been shown to aid clinical diagnosis and intervention …
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Heart rate variability and wellness monitoring in collegiate athletes
Purpose: Heart rate variability (HRV) is the measure of time between heartbeats. It reflects autonomic nervous system modulation of the cardiovascular system, and is often used to track stressors acting upon the body. In the recent past it has been applied to athletes to track the influence of …
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Heart rate variability in mice with coronary heart disease
Heart rate variability (HRV), the beat-to-beat fluctuation of the heart rate, is a non-invasive test that measures the autonomic regulation of the heart. Assessment of HRV has been shown to predict the risk of mortality in patients after an acute myocardial infarction. Recently, the Krieger lab at …
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Hidden Markov Models for Heart Rate Variability with Biometric Applications
… Markov models: HMM) for modeling individual heart rate variability: HRV) is presented. Starting with a physiologically based statistical model for HRV from the literature, we justify use of HMMs and present methods for parameterizing the model. The forward-backward algorithm and …
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Effect of Postmenopausal Hormone Replacement Therapy on Heart Rate Variability
… hormone replacement therapy (HRT) on heart rate variability (HRV), a measure of cardiovascular autonomic balance and a predictor of cardiac morbidity/mortality. Using an exploratory, pre-test/post-test design to describe HRV in postmenopausal women (PMW) before/after six weeks of HRT, …
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Categorizing Fetal Heart Rate Variability with and without Visual Aids
… and novices to correctly categorize fetal heart rate (FHR) variability with and without the use of exemplars. Clinicians and undergraduate students were asked to inspect FHR images and determine into which of four categories they belonged. Each participant took part in three conditions: one …
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Exploring the relationship between anxiety sensitivity and heart rate variability
… consequences. In general, literature demonstrates three underlying dimensions of AS: fear of cognitive dyscontrol (i.e., cognitive concerns), fear of physiological anxiety sensations (i.e., physical concerns), and fear of negative evaluation (i.e., social concerns). Elevated AS and underlying …
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Visualisation and pattern recognition of heart rate variability / Ben Raymond.
Considers various signal processing aspects of heart rate variability analysis; in particular, those of data visualisation and classification.
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Effectiveness of Biofeedback in Improving Heart Rate Variability Recovery Following Stress
… study was designed to examine the efficacy of heart rate variability (HRV) biofeedback using emWave, a specific biofeedback device available to the public, and to determine whether such treatment affects phasic physiological responses to stress. Twenty-seven individuals (4 males, 23 females), …
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Analysis of Heart Rate Variability in Female Patient with Overactive Bladder
"목적: 당뇨나 신경학적 병변 등의 질환을 동반하지 않는 특발성 과민성 방광의 원인은 아직까지 밝혀져 있지 않다. 이러한 과민성 방광 환자들에게 전신적인 자율신경계의 이상이 원인 인자로 작용하는 지를 알아보기 위해 심박동수 변이를 측정하여 각각의 지표를 정상인의 그것과 비교분석함으로써 과민성 방광 환자에서 정상인과 다른 자율신경계의 이상이 존재하는지 알아 보고자 하였다. 대상과 방법: 실험실 검사에서 모두 정상이었고 자율신경계의 이상을 초래할 만한 질병을 동반하지 않은 32명의 과민성 방광으로 진단된 여성환자 (평균나이 …
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Examining the effects of wearable technology and biometric coaching on heart rate variability, health related quality of life, and predictors of heart rate variability in collegiate athletes
… plus personalized biometric-based coaching on heart rate variability (HRV) and health-related quality of life (HRQoL). Participants: Student athletes on NCAA Division I Eastern Washington University football team. Methods: A mixed study design including randomization of participants into a …
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Physical Activity, Heart Rate Variability, Sleep Parameters, and Glycemic Variability in T1D
… individuals with type 1 diabetes (T1D), glycemic variability (GV), beyond mean glucose levels, is a critical determinant of cardiovascular risk and long-term complications. Although physical activity and sleep are key behavioral factors influencing glycemic control, prior research has largely …
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Military Sexual Trauma Exposure and Heart Rate Variability Outcomes in Female Veterans
… of Investigation and Hypothesis: Decreased heart rate variability (HRV) has been used as a predictor of cardiac and all-cause mortality. Studies have documented decreased HRV in a variety of conditions, including posttraumatic stress disorder (PTSD), depression, age, coronary artery disease …
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Multifractal analysis of heart rate variability using wavelet-transform modulus-maxima method
… studies reveal that under normal conditions, the heart rate time series shows multifractal behavior. In contrast, HRV in the pathological state such as congestive heart failure exhibits more monofractal-like structure. Recent advances in the assessment of heart rate variability (HRV) uses a …
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Design and implementation of heart rate variability measures in the time domain
… derive five time domain and two frequency domain Heart Rate Variability (HRV) measures from 24 hour Holter monitor recordings and to generate activity plots that display the variation of three of the five time domain measures and two frequency domain measures over a period of 24 hours. Working …
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Impact of missed beats on heart rate variability using time-frequency analysis
… analysis does not appropriately represent heart rate variability (HRV) during and after exercise because it assumes a signal to be stationary. In addition, Fourier analysis provides information of the heart rate only in the frequency domain. Therefore, there was a need to apply …
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