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https://www.readbyqxmd.com/read/29053066/different-times-of-day-do-not-change-heart-rate-variability-recovery-after-light-exercise-in-sedentary-subjects-24%C3%A2-hours-holter-monitoring
#1
Eliza Prodel, Tiago Peçanha, Lilian Pinto Da Silva, Rogério Baumgratz De Paula, Daniel Godoy Martinez, Jorge Roberto Perrout De Lima, Mateus Camaroti Laterza
Incidence of cardiovascular events follows a circadian rhythm with peak occurrence during morning. Disturbance of autonomic control caused by exercise had raised the question of the safety in morning exercise and its recovery. Furthermore, we sought to investigate whether light aerobic exercise performed at night would increase HR and decrease HRV during sleep. Therefore, the aim of this study was to test the hypothesis that morning exercise would delay HR and HRV recovery after light aerobic exercise, additionally, we tested the impact of late night light aerobic exercise on HR and HRV during sleep in sedentary subjects...
October 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29052467/the-effect-of-level-of-injury-and-physical-activity-on-heart-rate-variability-following-spinal-cord-injury
#2
Athanasios Kyriakides, Dimitrios Poulikakos, Angeliki Galata, Dimitrios Konstantinou, Elias Panagiotopoulos, Elisabeth Chroni
OBJECTIVE/BACKGROUND: To assess frequency domain heart rate variability (HRV) parameters at rest and in response to postural autonomic provocations in individuals with spinal cord injury (SCI) and investigate the autonomic influences on the heart of different physical activities. DESIGN: Cross-sectional study. METHODS: Ten subjects with complete cervical SCI and fourteen subjects with complete low thoracic SCI were prospectively recruited from the community and further divided in sedentary and physically active groups, the latter defined as regular weekly 4 hour physical activity for the preceding 3 months...
October 20, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29051738/early-seizure-detection-based-on-cardiac-autonomic-regulation-dynamics
#3
Jonatas Pavei, Renan G Heinzen, Barbora Novakova, Roger Walz, Andrey J Serra, Markus Reuber, Athi Ponnusamy, Jefferson L B Marques
Epilepsy is a neurological disorder that causes changes in the autonomic nervous system. Heart rate variability (HRV) reflects the regulation of cardiac activity and autonomic nervous system tone. The early detection of epileptic seizures could foster the use of new treatment approaches. This study presents a new methodology for the prediction of epileptic seizures using HRV signals. Eigendecomposition of HRV parameter covariance matrices was used to create an input for a support vector machine (SVM)-based classifier...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29049621/autonomic-nervous-system-responses-to-hearing-related-demand-and-evaluative-threat
#4
Carol L Mackersie, Lucia Kearney
Purpose: This paper consists of 2 parts. The purpose of Part 1 was to review the potential influence of internal (person-related) factors on listening effort. The purpose of Part 2 was to present, in support of Part 1, preliminary data illustrating the interactive effects of an external factor (task demand) and an internal factor (evaluative threat) on autonomic nervous system measures. Method: For Part 1, we provided a brief narrative review of motivation and stress as modulators of listening effort...
October 12, 2017: American Journal of Audiology
https://www.readbyqxmd.com/read/29049206/the-molecular-epidemiology-of-respiratory-viruses-associated-with-asthma-attacks-a-single-center-observational-study-in-japan
#5
Takeshi Saraya, Hirokazu Kimura, Daisuke Kurai, Haruyuki Ishii, Hajime Takizawa
Few reports have described the significance of viral respiratory infections (VRIs) in exacerbation of asthma in adult patients. The aim of this study was to elucidate the profiles of VRIs in adult patients with asthma along with their molecular epidemiology.A cross-sectional observational study was conducted at Kyorin University Hospital from August 2012 to May 2015. To identify respiratory pathogens in inpatients and outpatients suffering from asthma attacks, RT-PCR/sequencing/phylogenetic analysis methods were applied alongside conventional microbiological methods...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29042294/impaired-cardiac-autonomic-regulation-and-long-term-risk-of-atrial-fibrillation-in-patients-with-coronary-artery-disease
#6
Santeri Nortamo, Olavi Ukkola, Antti Kiviniemi, Mikko Tulppo, Heikki Huikuri, Juha Perkiömäki
BACKGROUND: The influence of autonomic cardiac regulation on long-term risk of new-onset atrial fibrillation (AF) in coronary artery disease (CAD) is not well established. OBJECTIVE: To evaluate the value of heart rate variability (HRV), a marker of cardiac autonomic regulation, in predicting new-onset AF in CAD. METHODS: The Innovation to Reduce Cardiovascular Complications of Diabetes at the Intersection (ARTEMIS) study population consisted of 1,946 patients with CAD...
October 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29041881/-age-related-changes-of-heart-rate-variability-at-various-insulin-sensitivity-and-telomere-length
#7
A S Boytsov, N O Tkachyeva, I L Streltsova, N E Dudinskaya, U D Akasheva, V E Plokhova, D I Strazhesko
AIM: To study relationship between age-associated changes of heart rate variability (HRV), telomere length (TL), and lowering of insulin sensitivity (IS). MATERIAL AND METHODS: We included in this study 229 individuals aged 23‒91 years without clinical manifestations of cardiovascular and other somatic diseases. In all participants, we analyzed HRV parameters obtained at 24-hour ECG monitoring (24-h ECG) and 5 minutes ECG recordings in the supine and standing positions...
July 2017: Kardiologiia
https://www.readbyqxmd.com/read/29040976/diagnosing-psychopathy-through-emotional-regulation-tasks-heart-rate-variability-versus-implicit-association-test
#8
Gerardo Flórez, Xosé A Vila, María J Lado, Pedro Cuesta, Ventura Ferrer, Luis S García, María R Crespo, Manuel Pérez
BACKGROUND: Nowadays, the assessment of psychopathy relies on semistructured interviews plus file reviews. In order to improve the predictive validity of psychopathy at the individual level, tools that are not based on the rating of signs and symptoms are in great need. SAMPLING AND METHODS: The present study was conducted in a representative sample of 204 Spanish sentenced inmates. These inmates have served at least 6 months of their sentence at the Pereiro de Aguiar (Ourense, Spain) penitentiary...
October 18, 2017: Psychopathology
https://www.readbyqxmd.com/read/29040884/heart-rate-variability-feature-selection-in-the-presence-of-sleep-apnea-an-expert-system-for-the-characterization-and-detection-of-the-disorder
#9
Sofía Martín-González, Juan L Navarro-Mesa, Gabriel Juliá-Serdá, Jan F Kraemer, Niels Wessel, Antonio G Ravelo-García
We introduce a sleep apnea characterization and classification approach based on a Heart Rate Variability (HRV) feature selection process, thus focusing on the characterization of the underlying process from a cardiac rate point of view. Therefore, we introduce linear and nonlinear variables, namely Cepstrum Coefficients (CC), Filterbanks (Fbank) and Detrended Fluctuation Analysis (DFA). Logistic Regression, Linear Discriminant Analysis and Quadratic Discriminant Analysis were used for classification purposes...
October 7, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29039946/phenylpropenoids-from-bupleurum-fruticosum-as-anti-human-rhinovirus-species-a-selective-capsid-binders
#10
Benedetta Fois, Giulia Bianco, Vijay P Sonar, Simona Distinto, Elias Maccioni, Rita Meleddu, Claudia Melis, Luisa Marras, Raffaello Pompei, Costantino Floris, Pierluigi Caboni, Filippo Cottiglia
The dichloromethane extract of the leaves of Bupleurum fruticosum was found to inhibit the replication of human rhinovirus (HRV) serotypes 14 and 39. Bioassay-guided fractionation led to the isolation of seven phenylpropenol derivatives (3-9), two polyacetylenes (1 and 2), and one monoterpene (10). Compounds 1 and 10 were identified as previously undescribed secondary metabolites after extensive 1D and 2D NMR experiments as well as high-resolution mass spectrometry. Compounds 2, 4, and 5 showed a selective inhibition of viral replication against HRV39 serotype, with 2 and 4 being the most active, with EC50 values of 1...
October 17, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29034583/the-effect-of-head-up-tilt-upon-markers-of-heart-rate-variability-in-patients-with-atrial-fibrillation
#11
Hitesh C Patel, Carl Hayward, Andrew J Wardle, Lee Middleton, Alexander R Lyon, Carlo Di Mario, Tushar V Salukhe, Richard Sutton, Stuart D Rosen
BACKGROUND: Heart rate variability (HRV) analysis is uncommonly undertaken in patients with atrial fibrillation (AF) due to an assumption that ventricular response is random. We sought to determine the effects of head-up tilt (HUT), a stimulus known to elicit an autonomic response, on HRV in patients with AF; we contrasted the findings with those of patients in sinus rhythm (SR). METHODS: Consecutive, clinically indicated tilt tests were examined for 207 patients: 176 in SR, 31 in AF...
October 15, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29034226/an-overview-of-heart-rate-variability-metrics-and-norms
#12
REVIEW
Fred Shaffer, J P Ginsberg
Healthy biological systems exhibit complex patterns of variability that can be described by mathematical chaos. Heart rate variability (HRV) consists of changes in the time intervals between consecutive heartbeats called interbeat intervals (IBIs). A healthy heart is not a metronome. The oscillations of a healthy heart are complex and constantly changing, which allow the cardiovascular system to rapidly adjust to sudden physical and psychological challenges to homeostasis. This article briefly reviews current perspectives on the mechanisms that generate 24 h, short-term (~5 min), and ultra-short-term (<5 min) HRV, the importance of HRV, and its implications for health and performance...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29033572/role-of-heart-rate-variability-in-preoperative-assessment-of-physiological-reserves-in-patients-undergoing-major-abdominal-surgery
#13
Petr Reimer, Jan Máca, Pavel Szturz, Ondřej Jor, Roman Kula, Pavel Ševčík, Michal Burda, Milan Adamus
BACKGROUND: Major abdominal surgery (MAS) is associated with increased morbidity and mortality. The main objective of our study was to evaluate the predictive value of heart-rate variability (HRV) concerning development of postoperative complications in patients undergoing MAS. The secondary objectives were to identify the relationship of HRV and use of vasoactive drugs during anesthesia, intensive care unit length of stay (ICU-LOS), and hospital length of stay (H-LOS). PATIENTS AND METHODS: Sixty-five patients scheduled for elective MAS were enrolled in a prospective, single-center, observational study...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29033350/phenotypical-characterization-of-human-rhinovirus-infections-in-severely-premature-children
#14
Geovanny F Perez, Bassem Kurdi, Rosemary Megalaa, Krishna Pancham, Shehlanoor Huseni, Natalia Isaza, Carlos E Rodriguez-Martinez, Dinesh Pillai, Gustavo Nino
BACKGROUND: Human Rhinovirus (HRV) has been identified as the most common cause of acute respiratory infections and hospitalizations in premature children. It is unclear if premature children are more susceptible to HRV due to their decreased pulmonary reserve or because they have enhanced lower airway reactivity to HRV. METHODS: We conducted a retrospective analysis of the clinical respiratory presentation of all PCR-confirmed HRV infections in full-term and premature children aged ≤3 years in our institution...
September 27, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/29033120/heart-rate-variability-and-lifetime-risk-of-cardiovascular-disease-the%C3%A2-atherosclerosis-risk-in-communities-study
#15
Yasuhiko Kubota, Lin Y Chen, Eric A Whitsel, Aaron R Folsom
PURPOSE: The purpose of this study was to estimate the heart rate variability (HRV)-related lifetime cardiovascular disease (CVD) risk. METHODS: We followed 9744 participants without baseline CVD and used a life-table approach to estimate lifetime CVD risk (coronary heart disease, heart failure, and stroke) from 45 through 85 years according to several HRV measures (the SD of RR intervals [SDNN], the root mean square of successive differences of successive RR intervals, the mean of all normal RR intervals [meanNN], low-frequency [LF] and high-frequency [HF] power, and the LF/HF ratio)...
October 3, 2017: Annals of Epidemiology
https://www.readbyqxmd.com/read/29031389/maternal-n-6-and-n-3-fatty-acid-status-during-pregnancy-is-related-to-infant-heart-rate-and-heart-rate-variability-an-exploratory-study
#16
M L Drewery, A V Gaitán, S B Spedale, C J Monlezun, D C Miketínas, C J Lammi-Keefe
Early life heart rate (HR) and heart rate variability (HRV) reflect autonomic system maturation. Intervention with n-3 long chain polyunsaturated fatty acids (LCPUFAs) during pregnancy favorably affects fetal HR and HRV, complementing previous observations for n-3 LCPUFA intervention during infancy. The relationship between maternal fatty acid status during pregnancy and infant HR/HRV has not previously been assessed. The aim of this study was to explore associations between maternal n-6 and n-3 fatty acid status during pregnancy and infant HR and HRV at 2 weeks, 4 months, and 6 months of age using linear regression models...
November 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29031213/impairment-of-heart-rhythm-complexity-in-patients-with-drug-resistant-epilepsy-an-assessment-with-multiscale-entropy-analysis
#17
Hongyun Liu, Zhao Yang, Fangang Meng, Yuguang Guan, Yanshan Ma, Shuli Liang, Jiuluan Lin, Longsheng Pan, Mingming Zhao, Wei Qu, Hongwei Hao, Guoming Luan, Jianguo Zhang, Luming Li
OBJECTIVE: Epilepsy and seizures can have dramatic effects on the cardiac function. The aim of this study was to investigate the heart rhythm complexity in patients with drug-resistant epilepsy (DRE). METHODS: Ambulatory 24-h electrocardiograms (ECG) from 70 DRE patients and 50 healthy control subjects were analyzed using conventional heart rate variability (HRV) and multiscale entropy (MSE) methods The variation of complexity indices (CI), which was calculated from MSE profile, was determined...
October 5, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29030697/geomagnetic-storm-under-laboratory-conditions-randomized-experiment
#18
Yu I Gurfinkel, A L Vasin, R Yu Pishchalnikov, R M Sarimov, M L Sasonko, T A Matveeva
The influence of the previously recorded geomagnetic storm (GS) on human cardiovascular system and microcirculation has been studied under laboratory conditions. Healthy volunteers in lying position were exposed under two artificially created conditions: quiet (Q) and storm (S). The Q regime playbacks a noise-free magnetic field (MF) which is closed to the natural geomagnetic conditions on Moscow's latitude. The S regime playbacks the initially recorded 6-h geomagnetic storm which is repeated four times sequentially...
October 13, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29030236/long-term-aerobic-exercise-in-calsequestrin2-knockout-mice-accentuates-vagal-antagonism-during-%C3%AE-adrenergic-stimulation-which-restricts-heart-rate-acceleration-and-paradoxically-increases-abnormal-ryanodine-receptor-calcium-leak-in-ventricular-myocytes
#19
Hsiang-Ting Ho, Senthil Thambidorai, Björn C Knollmann, George E Billman, Sandor Györke, Anuradha Kalyanasundaram
BACKGROUND: Long-term aerobic exercise (EX) alters autonomic balance which may not be favorable in heart rate (HR) dependent arrhythmic diseases including Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) due to preexisting bradycardia and increased sensitivity to parasympathetic stimulation. OBJECTIVE: The purpose of this study was to determine if long-term exercise-induced autonomic adaptations modify CPVT susceptibility. METHODS: We determined exercise-induced parasympathetic effects on HR, arrhythmia incidence and intracellular sarcoplasmic reticulum (SR) Ca(2+) leak in atrial (ACM) and ventricular (VCM) cardiomyocytes, in EX Calsequestrin knockout (CASQ2(-/-)) mice, a model of CPVT...
October 10, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29030216/disrupted-physiological-reactivity-among-children-with-a-history-of-suicidal-ideation-moderation-by-parental-expressed-emotion-criticism
#20
Kiera M James, Mary L Woody, Cope Feurer, Anastacia Y Kudinova, Brandon E Gibb
OBJECTIVE: The goal of this study was to examine physiological reactivity during parent-child interactions in children with and without a history of suicidal ideation (SI), a group known to be at increased risk for suicidal thoughts and behaviors in the future. We also examined the potential moderating role of parental expressed emotion-criticism (EE-Crit) to determine whether the presence of parental criticism may help to identify a subgroup of children with a history of SI most at risk for physiological dysregulation...
October 13, 2017: Biological Psychology
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