Academic literature on the topic 'Heart rhythm variability'

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Journal articles on the topic "Heart rhythm variability"

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Wang, Hui-Min, and Sheng-Chieh Huang. "Musical Rhythms Affect Heart Rate Variability: Algorithm and Models." Advances in Electrical Engineering 2014 (September 17, 2014): 1–14. http://dx.doi.org/10.1155/2014/851796.

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There were a lot of psychological music experiments and models but there were few psychological rhythm experiments and models. There were a lot of physiological music experiments but there were few physiological music models. There were few physiological rhythm experiments but there was no physiological rhythm model. We proposed a physiological rhythm model to fill this gap. Twenty-two participants, 4 drum loops as stimuli, and electrocardiogram (ECG) were employed in this work. We designed an algorithm to map tempo, complexity, and energy into two heart rate variability (HRV) measures, the st
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Loboda, O. M., I. O. Dudar, and Y. I. Gonchar. "HEART RATE VARIABILITY IN HEMODIALYSIS PATIENTS." Ukrainian Journal of Nephrology and Dialysis, no. 2(38) (December 12, 2017): 93–99. http://dx.doi.org/10.31450/ukrjnd.2(38).2013.07.

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There are a small number of works that have studied heart rhythm variability parameters in patients treated with hemodialysis.
 Aim. To investigate the peculiarities of heart rhythm variability parameters in patients treated with hemodialysis.
 Methods. The observational controlled study included 55 patients treated with hemodialysis, aged 24 to 75 years, including 29 men and 26 women. The control group consisted of 20 healthy individuals of comparable age and sex. Heart rhythm variability parameters were investigated in all patients.
 Results. In the study of heart rhythm varia
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Wright, Shannon E., and Caroline Palmer. "Auditory rhythm complexity affects cardiac dynamics in perception and synchronization." PLOS ONE 18, no. 11 (2023): e0293882. http://dx.doi.org/10.1371/journal.pone.0293882.

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Accurate perception and production of auditory rhythms are key for human behaviors such as speech and music. Auditory rhythms in music range in their complexity: complex rhythms (based on non-integer ratios between successive tone durations) are more difficult to perceive and produce than simple rhythms (based on integer ratios). The physiological activity supporting this behavioral difference is not well understood. In a within-subjects design, we addressed how rhythm complexity affects cardiac dynamics during auditory perception and production. Musically trained adults listened to and synchr
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Khapaliuk, A. V., V. M. Podobed, A. T. Kuzmenko, and E. G. Slipchenko. "VARIABILITY OF THE HEART RHYTHM AT PATIENTS WITH THE METABOLIC SYNDROME." Health and Ecology Issues, no. 1 (March 28, 2005): 90–95. http://dx.doi.org/10.51523/2708-6011.2005-2-1-17.

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Research of heart rhythm variability at patients with the metabolic syndrome is carried out. Communication between parameters of heart rhythm variability, psychological status and heart rhythm infringements on type extrasystoles is shown. The method of a course general magnetotherapy for correction of independent nervous system disbalance is offered.
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Teerlink, J. R., and J. P. Clozel. "Hemodynamic variability and circadian rhythm in rats with heart failure: role of locomotor activity." American Journal of Physiology-Heart and Circulatory Physiology 264, no. 6 (1993): H2111—H2118. http://dx.doi.org/10.1152/ajpheart.1993.264.6.h2111.

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Heart rate variability is known to be decreased by heart failure; however, the influences of concomitant diseases, changes in activity level, evolution through time, and abnormalities in the circadian rhythm are unknown. This study evaluated the influence of these factors by assessing hemodynamic variability in rats with heart failure (n = 8) and sham-operated controls (n = 8) through telemetric monitoring of heart rate, blood pressure, and locomotor activity for 8 wk. Hemodynamic variability was assessed by the standard deviation as well as hourly standard deviations and coefficients of varia
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Alejnikova, T. V. "HEART RATE VARIABILITY (literature review)." Health and Ecology Issues, no. 1 (March 28, 2012): 17–23. http://dx.doi.org/10.51523/2708-6011.2012-9-1-3.

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The set of works is devoted studying of heart rate variability (HRV). Article represents the literature review on the given theme. In it modern representations about heart rate variability as a method estimating a condition of mechanisms of regulation of physiological functions of a human body are stated, classical methods of the analysis and possibility of clinical application are considered. The heart rhythm is the indicator of the deviations arising in vegetative nervous system, and change of a heart rhythm - the earliest prognostic sign of many diseases. In clinical practice analysis of he
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Guziy, O.V., and A.P. Romanchuk. "[DYNAMICS OF VARIABILITY CARDIORESPIRATORY SYSTEM UNDER THE INFLUENCE OF THE TRAINING LOAD]." Medichna reabіlіtacіya, kurortologіya, fіzіoterapіya [Medical Rehabilitation, Balneology, Physiotherapy] 2015, no. 1 (2015): 35–40. https://doi.org/10.5281/zenodo.20073.

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According to the investigation with using spiroarteriocardiorhythmography it has been found study found that under the influence o f the training load in sportsmen, engaged o f water polo, significantly change indexes o f variability heart rhythm, SBP, DBP and spontaneous breathing. It has been shown that in the post-exercise period the moderate and expressed decrease o f TP heart rate (in 70.9 % o f sportsmen), minor changes in TPSBP and a moderate increase in TPDBP. This occurs against the background o f moderate and expressed increase (in 71 % o f spotsmen) TPbr. Dynamics o f variability in
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Massin, M. M. "Circadian rhythm of heart rate and heart rate variability." Archives of Disease in Childhood 83, no. 2 (2000): 179–82. http://dx.doi.org/10.1136/adc.83.2.179.

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Logvinenko, A., L. Mishchenko, E. Kupchynska, et al. "RESISTANT HYPERTENSION AND VARIABILITY OF HEART RHYTHM." Journal of Hypertension 37 (July 2019): e112. http://dx.doi.org/10.1097/01.hjh.0000571456.20629.3d.

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Sammito, Stefan, Wiebke Sammito, and Irina Böckelmann. "The circadian rhythm of heart rate variability." Biological Rhythm Research 47, no. 5 (2016): 717–30. http://dx.doi.org/10.1080/09291016.2016.1183887.

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Dissertations / Theses on the topic "Heart rhythm variability"

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Saxon, LaDonna Christine. "Heart rhythm variability in persons with chronic pain." Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9037/.

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The present study evaluated the utility of heart rhythm coherence (HRC) feedback to reduce the reported pain intensity of patients enrolled in a multimodal pain management program. Participants were recruited and assigned to a usual treatment group (UT) or a heart rhythm coherence feedback group (UT+HRC). It was hypothesized that UT+HRC participants who achieved heart rhythm coherence would report a reduction of pain intensity, as measured by the McGill Pain Inventory. For those whose pain intensity decreased, it was also expected that their self reported levels of depression as measured by th
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Saxon, LaDonna Christine Doster Joseph A. 1943. "Heart rhythm variability in persons with chronic pain." [Denton, Tex.] : University of North Texas, 2008. http://digital.library.unt.edu/permalink/meta-dc-9037.

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Hammash, Muna Hassan. "CARDIAC RHYTHM DURING MECHANICAL VENTILATION AND WEANING FROM VENTILATION." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/56.

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The transition from mechanical ventilation (MV) to spontaneous ventilation during weaning is associated with hemodynamic alterations and autonomic nervous system (ANS) alterations (reflected by heart rate variability [HRV]). Although cardiac dysrhythmias are an important manifestation of hemodynamic alterations, development of dysrhythmias during MV and weaning and subsequent impact on length of MV has received little attention. The purposes of this dissertation were to 1) evaluate the relationship of heart rate variability (HRV) during weaning to the development of cardiac dysrhythmias and 2)
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Jež, Radek. "Software pro ruční rozměření signálů EKG." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219251.

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This thesis deals with evaluation EKG in terms of classification rhythm and analysis HRV. In theoretic part of work are described basics of heart physiology and its usual pathology, basics of electrocardiography, evaluation EKG and standard methods of HRV evaluation. In practical part are described algorithms used in created application. Mainly describes technique of rhythm evaluation, ectopic rhythms and delineation error elimination, data preparing for HRV evaluation, drift removal from DES and HRV evaluation methods. Created program was tested on CSE and MIT- BIH database records. For lack
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Coelho, Eliza Prodel. "Efeito agudo de uma sessão de exercício físico no controle autonômico cardíaco no ciclo circadiano." Universidade Federal de Juiz de Fora, 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/1894.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-06-24T11:28:14Z No. of bitstreams: 1 elizaprodelcoelho.pdf: 22713702 bytes, checksum: 78780693b3e840a67d3ab6645c599232 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2016-07-13T15:42:18Z (GMT) No. of bitstreams: 1 elizaprodelcoelho.pdf: 22713702 bytes, checksum: 78780693b3e840a67d3ab6645c599232 (MD5)<br>Made available in DSpace on 2016-07-13T15:42:18Z (GMT). No. of bitstreams: 1 elizaprodelcoelho.pdf: 22713702 bytes, checksum: 78780693b3e840a67d3ab6645c599232 (MD5) Previous issue da
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Negrao, Bianca Lee. "Autonomic correlates at rest and during evoked attention in children with attention-deficit/hyperactivity disorder and effects of sympathomimetic medication." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-07072009-163036/.

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Cosgrave, Jan. "Unravelling the links between psychotic-like experiences, sleep and circadian rhythms." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:0e871ab6-6bbd-48f2-99fd-94ef2df95937.

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Psychotic-like experiences (PLEs) are prevalent occurrences deemed comparable with the symptoms of psychosis, but not sufficiently severe to warrant a diagnosis upon clinical presentation. Their presence is associated with several adverse clinical outcomes: the onset of various common mental health disorders (e.g. anxiety, mood, substance abuse), poorer functioning, non-remission and relapse. Sleep and circadian rhythm disruption (SCRD) is observed in 30-80% of patients with psychosis. The omnipotence of SCRD across all phases of the disorder (including the prodromal, acute, chronic and residu
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Tuladhar, Rohisha. "Renewal and Memory Approaches to Study Biological and Physiological Processes." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505157/.

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In nature we find many instances of complex behavior for example the dynamics of stock markets, power grids, internet networks, highway traffic, social networks, heartbeat dynamics, neural dynamics, dynamics of living organisms, etc. The study of these complex systems involves the use of tools of non-linear dynamics and non-equilibrium statistical physics. This dissertation is devoted to understanding two different sources of complex behavior – non-poissonian renewal events also called crucial events and infinite memory of fractional Brownian motion. They both generate 1/f noise frequency spe
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Speller, Lassiter F. "The Effects of Training and Individual Differences in Heart Rate Variability on the Golf Swing’s Coordination Structure." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345224279.

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Granget, Jules. "Soulagement de la dyspnée par stimulation olfactive." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS114.

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Notre cerveau orchestre la respiration par un équilibre d'informations sensorielles afférentes et les commandes respiratoires efférentes, volontaires ou autonomes. Une anomalie dans cet équilibre déclenche des sensations d'inconforts respiratoire regroupés sous le terme de « dyspnée ». La dyspnée représente non seulement une douleur physique, mais aussi une détresse psychologique avec une crainte quotidienne de mourir, entraînant de fortes réductions de la qualité de vie. Des opportunités thérapeutiques existent pour corriger les anomalies respiratoires impliquées dans la dyspnée, cependant, e
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Books on the topic "Heart rhythm variability"

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Cheung, Stephen S., and Philip N. Ainslie. Advanced Environmental Exercise Physiology. Human Kinetics, 2022. http://dx.doi.org/10.5040/9781718220928.

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Advanced Environmental Exercise Physiology, Second Edition, offers physiology students and exercise science professionals a complete look at the major topics and debates in the field of environmental physiology. In this second edition, Dr. Stephen Cheung is joined by the coauthor Dr. Phil Ainslie, who has extensive professional expertise in mountaineering and high-altitude physiology and has led numerous high-altitude research expeditions. Among the issues explored in this text are the effects of heat, hydration, and cold in the thermal environment; diving, altitude training, and other pressur
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Book chapters on the topic "Heart rhythm variability"

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Deepak, Kishore K. "Heart Rate Variability: Molecular Mechanisms and Clinical Implications." In Heart Rate and Rhythm. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17575-6_6.

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Dhananjay, B., and J. Sivaraman. "The Role of Heart Rate Variability in Atrial ECG Components of Normal Sinus Rhythm and Sinus Tachycardia Subjects." In Advances in Intelligent Systems and Computing. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5400-1_61.

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de Guevara, M. Soledad Ladrón, Jaume Figueras-Bellot, Julio Montoyo, Jordi Soler-Soler, and Salvador M. Guinjoan. "Effect of Depressive Symptoms on the Diurnal Rhythm of Heart Rate Variability Three Days and Six Months after an Acute Coronary Syndrome." In IFMBE Proceedings. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03882-2_79.

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Lisitsyna L., Lyamin A., and Skshidlevsky A. "Estimation of Student Functional State in Learning Management System by Heart Rate Variability Method." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2014. https://doi.org/10.3233/978-1-61499-405-3-726.

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In this paper considered the estimate of the functional state of the student based on the activity of regulatory systems. Degree of tension of regulatory systems is evaluated based on mathematical analysis of cardiac rhythm &amp;ndash; the analysis of heart rate variability. During the student's work in the learning management system not only his answers are analyzed, but also the intension of the physiological system, determined by the method of heart rate variability analysis. Special software analyzes heart rate variability and transmits the results of analysis in the learning management sy
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Accardo Agostino, Cusenza Monica, De Felice Alberto, Fornasa Elisa, and D'Addio Giovanni. "Ultradian Rhythms During Day and Night in Normal and COPD Subjects." In Studies in Health Technology and Informatics. IOS Press, 2012. https://doi.org/10.3233/978-1-61499-101-4-1120.

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The analysis of heart rate variability (HRV) is a powerful tool in the study of the autonomic control of the heart. While circadian HRV rhythms have widely been characterized by traditional spectral measures, ultradian oscillations are not commonly investigated. In this study the identification of HRV ultradian rhythms is assigned to a quantitative measure characterizing the fractal-like behavior of the time series: the fractal dimension (FD). In order to assess ultradian regulation in Chronic Obstructive Pulmonary Disease (COPD) 24-h Holter ECG recordings of 52 COPD and 10 normal (healthy) su
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Serhiyenko, Victoria, Marta Hotsko, Yuriy Markevich, et al. "Diabetic Cardiac Autonomic Neuropathy: Link between Heart Rate Variability, Violated Blood Pressure Pattern, and Pulse Wave Velocity." In Topics in Autonomic Nervous System [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112894.

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Abnormalities in heart rate (HR) variability (HRV) and blood pressure (BP) variability may increase the risk of cardiovascular diseases. A well-known risk factor for cardiovascular morbidity, such as arrhythmias, stroke, congestive heart failure, heart attacks, and sudden death syndrome, is cardiac autonomic neuropathy (CAN). It has been claimed that chronobiologically evaluating HRV and BP and optimizing timed treatment efficacy can significantly lower the risk of cardiac or stroke death. Physiological cardiovascular activities are under the control of the cardiac autonomic nervous system. Da
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Shinba, Toshikazu. "Characteristic Profiles of Heart Rate Variability in Depression and Anxiety." In Biomedical Engineering. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104205.

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This chapter on heart rate variability (HRV) presents a view based on our published data that HRV profiles in depression and anxiety show differences and can be used for the differentiation of these two disorders in clinical practices. Characteristic HRV profiles in depression and anxiety are revealed by measurements incorporating task load. Analysis of two frequency-domain HRV parameters, low frequency (LF) and high frequency (HF), together with heart rate (HR) itself measured at rest (Rest), during the task load (Task), and at rest after the task (After) enables the evaluation of the autonom
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BASELLI G., PORTA A., FERRARI G., CERUTTI S., RIMOLDI O., and PAGANI M. "Multi-Variate Identification and Spectral Decomposition for the Assessment of Cardiovascular Control." In Studies in Health Technology and Informatics. IOS Press, 1995. https://doi.org/10.3233/978-1-60750-857-1-95.

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Multi-variate identification methods applied for the analysis of heart period (HP), systolic arterial pressure (SAP) and respiration beat-by-beat series are discussed. A method for multi-variate spectral decomposition and for a classification of rhythm sources is presented and applied in a preliminary study on conscious dogs during different manoeuvres of sympathetic stimulation and enhancement of low frequency (LF) waves. Different contributions to LF oscillations are detected at control and different activation modes are found depending on the kind of the stimulus: overall increase of distur
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Otsuka, Kuniaki, Larry A. Beaty, and Germaine Cornelissen. "Inter-modulating Multi-frequency Rhythms." In Chronobiology and Chronomedicine. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839167553-00071.

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Circadian rhythms are characterized by their amplitude, phase, and period when they differ from 24 hours, in addition to the rhythm-adjusted mean (MESOR). Non-sinusoidal periodic signals can be described by the amplitude and phase of additional harmonic terms. Alterations in these characteristics are a hallmark of ageing and disease. Time-specified reference values in health make it possible to diagnose impending disease and to initiate treatment early, as illustrated for blood pressure and endpoints of heart rate variability. Often, there is a bidirectional relationship between disease risk a
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TenVoorde B.J., Peereboom J.C., Faes Th.J.C., Kingma R., and Heethaar R.M. "Heart Rate Variability and Baroreflex Sensitivity in Rest: a Study into Stationarity." In Studies in Health Technology and Informatics. IOS Press, 1997. https://doi.org/10.3233/978-1-60750-879-3-155.

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Mean heart rate (HR), spectral power of HR variability in a LF and HF-band, a normalized power ratio, and baroreflex sensitivity (BRS): all these are parameters which somehow reflect sympathetic and/or vagal modulating influence on the SA-node rhythm. In this study the stationarity of these parameters in 5 minute windows is investigated during 2 hours of steady state (sitting rest condition). Mean HR appeared by far the most stable parameter. HR LF-power was the least stable parameter, showing the most variance. Even the normalized power ratio, LF/(LF+ HF), although more stable, appeared to be
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Conference papers on the topic "Heart rhythm variability"

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Vadakkan, Jomole Varghese, M. Sabarimalai Manikandan, and Linga Reddy Cenkeramaddi. "Quality-Aware Rhythm-Aware Heart Rate Variability Analysis for Soldier Health and Wellness Monitoring Using Wearable ECG Sensing Devices." In 2024 IEEE International Workshop on Technologies for Defense and Security (TechDefense). IEEE, 2024. https://doi.org/10.1109/techdefense63521.2024.10863793.

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Zaidi, Syed Hassan, Imran Akhtar, Syed Imran Majeed, Tahir Zaidi, and Muhammad Saif Ullah Khalid. "Nonlinear Characterization of Heart Rate Variability in Normal Sinus Rhythm, Atrial Fibrillation and Congestive Heart Failure." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66836.

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This paper highlights the application of methods and techniques from nonlinear analysis to illustrate their far superior capability in revealing complex cardiac dynamics under various physiological and pathological states. The purpose is to augment conventional (time and frequency based) heart rate variability analysis, and to extract significant prognostic and clinically relevant information for risk stratification and improved diagnosis. In this work, several nonlinear indices are estimated for RR intervals based time series data acquired for Healthy Sinus Rhythm (HSR) and Congestive Heart F
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Liu, Jui-Yun, Zhi-Yu Lin, and Jian-Chiun Liou. "The ECG Measurement of Heart Rhythm Variability in Patients with Alzheimer's Disease." In 2024 10th International Conference on Applied System Innovation (ICASI). IEEE, 2024. http://dx.doi.org/10.1109/icasi60819.2024.10547977.

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Markov, Nikita, Ilya Kotov, Konstantin Ushenin, and Yakov Bozhko. "Statistical model for describing heart rate variability in normal rhythm and atrial fibrillation." In 2022 Ural-Siberian Conference on Computational Technologies in Cognitive Science, Genomics and Biomedicine (CSGB). IEEE, 2022. http://dx.doi.org/10.1109/csgb56354.2022.9865298.

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Tuzhilkin, Dmitry, Alexander V. Shitov, and Alexander S. Borodin. "Features of influence of spatially inhomogeneous geomagnetic field on a humans heart rhythm variability." In XXIII International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, edited by Oleg A. Romanovskii. SPIE, 2017. http://dx.doi.org/10.1117/12.2281993.

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Dhananjay, B., and J. Sivaraman. "Prediction of cardiac rhythm based on heart rate variability features in sinus tachycardia conditions." In 2021 Seventh International conference on Bio Signals, Images, and Instrumentation (ICBSII). IEEE, 2021. http://dx.doi.org/10.1109/icbsii51839.2021.9445167.

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Pan, Sheng-Yueh, Cheng-Han Tsai, Paul C. P. Chao, and Duc Huy Nguyen. "Sudden Cardiac Arrest Due to VT/VF Classification Based on Heart Rate Variability and Classification Model Hardware Design." In ASME 2023 32nd Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/isps2023-110673.

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Abstract Sudden cardiac arrest/death (SCA/SCD) is a disease that the heart cannot pump the blood effectively, so the blood flow loses rapidly. The patient may lose consciousness in an hour without appropriate treatment, and may take the patient’s life within minutes. Heart Rate Variability (HRV) is an electrocardiography (ECG) that uses QRS wave detection to calculate the R wave interval (R-R Interval, RRI), and uses the R wave interval to extract the time domain, frequency domain, and nonlinear characteristics of the heart rhythm. This work presents a neural network model algorithm based on h
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Lin, Shih-Hsiang, Yu-Chieh Huang, Ching-Yen Chien, et al. "A Study of the Relationship between Two Musical Rhythm Characteristics and Heart Rate Variability (HRV)." In 2008 International Conference on Biomedical Engineering And Informatics (BMEI). IEEE, 2008. http://dx.doi.org/10.1109/bmei.2008.305.

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Yu-Chieh Huang, Shih-Hsiang Lin, Ching-Yen Chien, et al. "A biomedical entertainment platform design based on musical rhythm characteristics and heart rate variability (HRV)." In 2008 IEEE International Conference on Multimedia and Expo (ICME). IEEE, 2008. http://dx.doi.org/10.1109/icme.2008.4607452.

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Olemann, A., and Desok Kim. "Detection of paroxysmal atrial fibrillation subjects based on circadian rhythm parameters of heart rate variability." In 2011 IEEE International Conference on Bioinformatics and Biomedicine Workshops (BIBMW). IEEE, 2011. http://dx.doi.org/10.1109/bibmw.2011.6112508.

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