Results 301 to 310 of about 3,634,156 (345)
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Heart Rate Perception and Heart Rate Control
Psychophysiology, 1975ABSTRACTTwenty‐one subjects look the Autonomic Perception Questionnaire (APQ) and later were given another test of ability to perceive heart activity. The second test involved subjects' tracking of their own heart rates (HR). They were then tested for ability to increase and decrease HR from their resting baseline levels.
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The Effects of Specific Respiratory Rates on Heart Rate and Heart Rate Variability
Applied Psychophysiology and Biofeedback, 2003In this study respiratory rates of 3, 4, 6, 8, 10, 12, and 14 breaths per minute were employed to investigate the effects of these rates on heart rate variability (HRV). Data were collected 16 times at each respiratory rate on 3 female volunteers, and 12 times on 2 female volunteers.
Paul M. Lehrer, Hye-Sue Song
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Heart rate and heart rate variability, a pharmacological target
Cardiovascular Drugs and Therapy, 1997Heart rate varies with respiration, blood pressure, emotion, etc., and heart rate variability (HRV) is presently one of the best indices to predict fatal issues in cardiac failure and after myocardial infarction. HRV depends on various reflexes. In addition, parallel studies of HRV and the myocardial adrenergic and muscarinic transduction system in ...
François Carré +11 more
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Annals of Internal Medicine, 1993
To present an overview of the applicability of heart rate variability measurements in medicine.During a 4-year period all new papers concerning heart rate variability were collected. A selection of the most recent publications in the presented research area was used for this review.The amount of short- and long-term variability in heart rate reflects ...
C.M.A. van Ravenswaaij-Arts +4 more
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To present an overview of the applicability of heart rate variability measurements in medicine.During a 4-year period all new papers concerning heart rate variability were collected. A selection of the most recent publications in the presented research area was used for this review.The amount of short- and long-term variability in heart rate reflects ...
C.M.A. van Ravenswaaij-Arts +4 more
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Heart rate normalization in the analysis of heart rate variability in congestive heart failure [PDF]
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2009 In this study, the effects of heart rate (HR) normalization in the analysis of the heart rate variability (HRV) were investigated to distinguish 29 patients with congestive heart failure from 54 healthy subjects in the control group. In the analysis performed, the best accuracy performances of optimal combination of standard short-term HRV measures and
Isler, Y., KUNTALP, MEHMET
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EFFECTS OF DEPTH AND RATE OF BREATHING ON HEART RATE AND HEART RATE VARIABILITY
Psychophysiology, 1971ABSTRACTEffects of depth and rate of breathing on heart rate (HR) and HR variability were observed in two experiments. Respiration rate (RR) affected only cardiac stability, faster breathing producing more stable cardiac rate. Respiration depth (RD) affected both HR level and variability.
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Current Opinion in Cardiology, 1998
Heart rate variability is a recognized tool for the estimation of cardiac autonomic modulations. Recently, several studies have advanced the field of heart rate variability in three areas: 1) in technical modes of electrocardiogram processing and heart rate variability assessment, 2) in physiologic understanding and interpretation, and 3) in clinical ...
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Heart rate variability is a recognized tool for the estimation of cardiac autonomic modulations. Recently, several studies have advanced the field of heart rate variability in three areas: 1) in technical modes of electrocardiogram processing and heart rate variability assessment, 2) in physiologic understanding and interpretation, and 3) in clinical ...
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Journal of Electrocardiology, 2003
Survivors of acute myocardial infarction are at increased risk of sudden cardiac death. Recent trials have demonstrated that in selected high risk post-myocardial infarction patients mortality can be significantly reduced by implantation of an autonomic cardioverter defibrillator.
Axel Bauer, Georg Schmidt
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Survivors of acute myocardial infarction are at increased risk of sudden cardiac death. Recent trials have demonstrated that in selected high risk post-myocardial infarction patients mortality can be significantly reduced by implantation of an autonomic cardioverter defibrillator.
Axel Bauer, Georg Schmidt
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2013
Heart rate variability (HRV) provides indirect insight into autonomic nervous system tone, and has a well-established role as a marker of cardiovascular risk. Recent decades brought an increasing interest in HRV assessment as a diagnostic tool in detection of autonomic impairment, and prediction of prognosis in several neurological disorders.
Wojciech Zareba, Iwona Cygankiewicz
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Heart rate variability (HRV) provides indirect insight into autonomic nervous system tone, and has a well-established role as a marker of cardiovascular risk. Recent decades brought an increasing interest in HRV assessment as a diagnostic tool in detection of autonomic impairment, and prediction of prognosis in several neurological disorders.
Wojciech Zareba, Iwona Cygankiewicz
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Medical & Biological Engineering & Computing, 1979
We describe the design of an instrument that can acquire and store the average heart rate of a subject over 256 time intervals of predetermined length (1 or 6 min) during normal daily activities. The instrument consists of two units: a portable recorder, worn by the patient, detects and counts heart beats, and stores their average in memory, and a ...
R. B. Mazess +3 more
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We describe the design of an instrument that can acquire and store the average heart rate of a subject over 256 time intervals of predetermined length (1 or 6 min) during normal daily activities. The instrument consists of two units: a portable recorder, worn by the patient, detects and counts heart beats, and stores their average in memory, and a ...
R. B. Mazess +3 more
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