Results 271 to 280 of about 1,785,309 (311)
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Veterinary Clinics of North America: Small Animal Practice, 1998
Heart rate variability (HRV), usually performed from 24 hour ambulatory ECG recordings, measures the variability of the heart rate. Alterations in autonomic balance and baroreceptor function, increased plasma norepinephrine levels, and reduced HRV have been associated with progressive myocardial failure.
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Heart rate variability (HRV), usually performed from 24 hour ambulatory ECG recordings, measures the variability of the heart rate. Alterations in autonomic balance and baroreceptor function, increased plasma norepinephrine levels, and reduced HRV have been associated with progressive myocardial failure.
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Heart rate normalization in the analysis of heart rate variability in congestive heart failure
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2009In 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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Heart Rate As a Biomarker in Heart Failure: Role of Heart Rate Lowering Agents
American Journal of Therapeutics, 2017Heart failure (HF) is a common clinical condition affecting more than 5.8 million people in the United States, it remains the leading cause of death in the United States and worldwide. Ongoing challenges for biomarker identification include the need for objective assessment, measurement precision, and meaningful replication.
Ghazwan, Shaaya +2 more
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Effect of Heart-Rate Control Training on Heart-Rate Discrimination
Perceptual and Motor Skills, 19784 subjects were exposed to discrimination-testing procedures before and after biofeedback training to increase and decrease their heart rates. Results indicated significant increases and decreases in heart rate, as well as a significant improvement in accuracy of discrimination. The results suggest improvements in discrimination may occur as a function
W R, Marshall, L H, Epstein
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American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2003
the rhythm of the heart has not only fascinated cardiologists but also inspired poets and musicians. Indeed, the periodic beat of the heart was used to define the speed of music. In music notation, the traditional Italian term “moderato” originally referred to one beat of the measure per ...
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the rhythm of the heart has not only fascinated cardiologists but also inspired poets and musicians. Indeed, the periodic beat of the heart was used to define the speed of music. In music notation, the traditional Italian term “moderato” originally referred to one beat of the measure per ...
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Heart Rate Variability and 24-hour Minimum Heart Rate
Biological Research For Nursing, 2006Heart rate variability (HRV) indices based on 24-hr electrocardiograph recordings have been used in clinical research studies to assess the aggregate activity of the autonomic nervous system. Although 24-hr HRV is generally considered noninvasive, use in research protocols typically involves considerable data collection and processing expenses and ...
Robert L, Burr +5 more
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Heart Rate and Heart Rate Variability in Normal Young Adults
Journal of Cardiovascular Electrophysiology, 1994Heart Rate and Heart Rate Variability. Introduction: The relationships between heart rate (HR) and HR variability (HRV) are not simple. Because both depend on the autonomic nervous system (ANS), they are not independent variables. Technically, the quantification of HRV is influenced by the duration of the cardiac cycles.
P, Coumel, P, Maison-Blanche, D, Catuli
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Heart rate and heart rate variability as indexes of sympathovagal balance
American Journal of Physiology-Heart and Circulatory Physiology, 1994According to the Rosenblueth-Simeone model, the heart rate (HR) is proportional to the sympathovagal balance. The individual proportionality constant is the intrinsic heart rate, which can only be determined invasively. The normalized low-frequency heart rate variability power (LF) has been raised as a calibrated noninvasive alternative.
M, Bootsma +5 more
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JAMA: The Journal of the American Medical Association, 1980
ABSTRACT To the Editor.— In The Journal (243:466, 1980), a small philosophical comment entitled "One Small Step for Mankind" caught my eye. The comments are lighthearted and do not deserve any harsh scientific rebuttal, but I would like to reply in the same light vein of thought to the oft-quoted concept, "We are all born with a certain number of heart-
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ABSTRACT To the Editor.— In The Journal (243:466, 1980), a small philosophical comment entitled "One Small Step for Mankind" caught my eye. The comments are lighthearted and do not deserve any harsh scientific rebuttal, but I would like to reply in the same light vein of thought to the oft-quoted concept, "We are all born with a certain number of heart-
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VEGFA mRNA for regenerative treatment of heart failure
Nature Reviews Drug Discovery, 2021Anna Collen +2 more
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