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https://www.readbyqxmd.com/read/28239850/depressive-symptomology-in-multiple-sclerosis-disability-cardiorespiratory-fitness-and-heart-rate-variability
#1
I Ensari, L A Pilutti, R W Motl
OBJECTIVES: This study aimed to investigate whether neurological disability status, heart rate variability (HRV), cardiorespiratory fitness (CRF) explained the variance in depressive symptoms in multiple sclerosis (MS). METHODS: Associations between CRF (via maximal oxygen uptake; VO2peak ), HRV indices of normalized ultra-low (nULF) and very low frequency domains (nVLF), neurological disability status and depressive symptoms (using the Depression subscale of the Hospital Anxiety Depression Scale; HADS-D) were assessed in 53 participants with MS and 17 matched controls...
February 26, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28238507/is-cardiac-autonomic-function-associated-with-cardiorespiratory-fitness-and-physical-activity-in-children-and-adolescents-a-systematic-review-of-cross-sectional-studies
#2
Ricardo Santos Oliveira, Alan Robert Barker, Kelly Michelle Wilkinson, Rebecca Anne Abbott, Craig Anthony Williams
BACKGROUND: Heart rate variability (HRV) is considered to explain improvements in cardiovascular health accrued by physical activity (PA) and cardiorespiratory fitness (CRF) over and above traditional cardiovascular risk factors. OBJECTIVE: To systematically address associations between HRV, PA and CRF in children and adolescents. DATA SOURCES: Medline, EMBASE, SportDISCUS and CINAHL Plus were searched on 5th September 2015 and updated on 4th August 2016...
February 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28227931/long-range-correlations-in-amplitude-variability-of-hf-and-lf-components-of-heart-rate-variability
#3
Yuki Miki, Yasuyuki Suzuki, Eiichi Watanabe, Junichiro Hayano, Yoshiharu Yamamoto, Taishin Nomura, Ken Kiyono, Yuki Miki, Yasuyuki Suzuki, Eiichi Watanabe, Junichiro Hayano, Yoshiharu Yamamoto, Taishin Nomura, Ken Kiyono
For the assessment of autonomic nervous system activity based on heart rate variability (HRV) analysis, characteristics of high-frequency (HF; 0.15 to 0.4 Hz) and low-frequency (LF; 0.04 to 0.15 Hz) components have been widely employed. HF and LF band powers quantified by power spectral analysis have most commonly been used in the conventional studies; the physiological significance of these measures has also been extensively studied. However, nonlinear characteristics of HF and LF components have not been well established...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227702/socioeconomic-status-age-and-heart-rate-variability-in-a-bangladeshi-community
#4
Nishat E-Sharmin Trisha, Herbert F Jelinek, Mika P Tarvainen, David J Cornforth, Dewan S Alam, Megan Smith, Nishat E-Sharmin Trisha, Herbert F Jelinek, Mika P Tarvainen, David J Cornforth, Dewan S Alam, Megan Smith, Herbert F Jelinek, David J Cornforth, Megan Smith, Nishat E-Sharmin Trisha, Dewan S Alam, Mika P Tarvainen
Socioeconomic status (SES) is a risk factor for cardiovascular disease (CVD) and either low or high heart rate variability (HRV) at rest has been shown to predict cardiovascular morbidity and mortality. The study investigated the extent HRV features can predict SES. Four hundred and twenty eight people were randomly selected from the commercial districts (high SES) and slum areas (low SES) within Dhaka city. Demographic, clinical, and HRV features were recorded. Of the clinical variables age, waist circumference and diastolic blood pressure (p<;0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227613/sleep-stage-classification-by-non-contact-vital-signs-indices-using-doppler-radar-sensors
#5
Masayuki Kagawa, Kazuki Suzumura, Takemi Matsui, Masayuki Kagawa, Kazuki Suzumura, Takemi Matsui, Kazuki Suzumura, Takemi Matsui, Masayuki Kagawa
Disturbed sleep has become more common in recent years. To improve the quality of sleep, undergoing sleep observation has gained interest as a means to resolve possible problems. In this paper, we evaluate a non-restrictive and non-contact method for classifying real-time sleep stages and report on its potential applications. The proposed system measures heart rate (HR), heart rate variability (HRV), body movements, and respiratory signals of a sleeping person using two 24-GHz microwave radars placed beneath the mattress...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227598/real-time-physiological-and-facial-monitoring-for-safe-driving
#6
Yu-Lung Chang, Yen-Cheng Feng, Oscal T-C Chen, Yu-Lung Chang, Yen-Cheng Feng, Oscal T-C Chen, Yen-Cheng Feng, Oscal T-C Chen, Yu-Lung Chang
This work is to develop an intelligent driver-assistance system which can perceive the physiological state of a driver to avoid fatigue driving. The proposed system includes a camera, a wireless ElectroCardioGram (ECG) sensor patch, and a computation platform. The camera in front of a driver is to catch a face image which is processed to obtain features of a mouth for identifying a yawn. The sensor patch records ECG signals which are computed to yield six Heart Rate Variability (HRV) parameters. Seven healthy subjects of 6 males and 1 female had individually driven a car, which was embedded with our system, for 3 hours at a well-known route, mostly in a freeway road...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226650/disentanglement-of-sympathetic-and-parasympathetic-activity-by-instantaneous-analysis-of-human-heartbeat-dynamics
#7
Gaetano Valenza, Luca Citi, Riccardo Barbieri, Gaetano Valenza, Luca Citi, Riccardo Barbieri, Luca Citi, Riccardo Barbieri, Gaetano Valenza
Spectral analysis of heart rate variability (HRV) is one of the most effective techniques for the assessment of the influence of the autonomic nervous system (ANS) on the heartbeat. Despite its widespread use, it has been demonstrated that HRV subdivision in the low frequency (LF) and high frequency (HF) bands does not accurately reflect separate sympathetic and parasympathetic influences, respectively, mainly due to overlap of the two branches in the low frequencies. Here we propose two novel indices, namely the instantaneous sympathetic autonomic index (SAI) and parasympathetic autonomic index (PAI), that are able to separately assess the time-varying ANS synergic functions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28217091/a-little-goes-a-long-way-low-working-memory-load-is-associated-with-optimal-distractor-inhibition-and-increased-vagal-control-under-anxiety
#8
Derek P Spangler, Bruce H Friedman
Anxiety impairs both inhibition of distraction and attentional focus. It is unclear whether these impairments are reduced or exacerbated when loading working memory with non-affective information. Cardiac vagal control has been related to top-down regulation of anxiety; therefore, vagal control may reflect load-related inhibition of distraction under anxiety. The present study examined whether: (1) the enhancing and impairing effects of load on inhibition exist together in a non-linear function, (2) there is a similar association between inhibition and concurrent vagal control under anxiety...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28213205/sensory-trigeminal-ulf-tens-stimulation-reduces-hrv-response-to-experimentally-induced-arithmetic-stress-a-randomized-clinical-trial
#9
Annalisa Monaco, Ruggero Cattaneo, Eleonora Ortu, Marian Vladimir Constantinescu, Davide Pietropaoli
Ultra Low Frequency Transcutaneous Electric Nervous Stimulation (ULF-TENS) is extensively used for pain relief and for the diagnosis and treatment of temporomandibular disorders (TMD). In addition to its local effects, ULF-TENS acts on the autonomic nervous system (ANS), with particular reference to the periaqueductal gray (PAG), promoting the release of endogenous opioids and modulating descending pain systems. It has been suggested that the PAG participates in the coupling between the emotional stimulus and the appropriate behavioral autonomic response...
February 14, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28209101/role-of-heart-rate-variability-in-predicting-post-endoscopic-retrograde-cholangiopancreatography-pancreatitis
#10
Y Tryliskyy, G J Bryce
INTRODUCTION: Early recognition of post-ERCP pancreatitis (PEP) would help deliver an appropriate discharge plan following ERCP. Functioning of the autonomic nervous system can be measured using non-invasive heart rate variability techniques (HRV) and provides quantitative information about the modulation of cardiac vagal and sympathetic activity. Pain evoked sympathetic activation is a well-known phenomenon, as exhibited in those suffering PEP. The aim of this study is to determine if a single post-procedural measurement of HRV identifies those at risk of developing PEP...
September 2016: Acta Gastro-enterologica Belgica
https://www.readbyqxmd.com/read/28208852/alteration-of-heart-rate-variability-in-patients-of-depression
#11
Deepti Jangpangi, Sunita Mondal, Rajiv Bandhu, Dinesh Kataria, Asha Gandhi
INTRODUCTION: Altered cardiac autonomic functions in form of reduced Heart Rate Variability (HRV) have been found to be associated with increased cardiovascular morbidity and mortality in depressive patients. AIM: To investigate the relationship between HRV measures, which is a non-invasive marker of autonomic nervous system and depression. MATERIALS AND METHODS: The study included a convenient sample size of drug naive depressive patients (n=30) diagnosed on basis of ICD-10 and compared with age and gender matched healthy volunteers (n=30)...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28198783/effect-of-moderate-versus-high-intensity-interval-exercise-training-on-heart-rate-variability-parameters-in-inactive-latin-american-adults-a-randomised-clinical-trial
#12
Robinson Ramírez-Vélez, Alejandra Tordecilla-Sanders, Luis Andrés Téllez-T, Diana Camelo-Prieto, Paula Andrea Hernández-Quiñonez, Jorge Enrique Correa-Bautista, Antonio Garcia-Hermoso, Rodrigo Ramírez-Campillo, Mikel Izquierdo
We investigated the effect of moderate versus high-intensity interval exercise training on the HRV indices in physically inactive adults. Twenty inactive adults were randomly allocated to receive either moderate intensity training (MCT group) or high-intensity interval training (HIT group). The MCT group performed aerobic training at an intensity of 55-75%, which consisted of walking on a treadmill at 60-80% of the maximum heart rate (HRmax) until the expenditure of 300 kcal. The HIT group ran on a treadmill for 4 minutes at 85-95% peak HRmax and had a recovery of 4 minutes at 65% peak HRmax until the expenditure of 300 kcal...
February 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28182118/musical-auditory-stimulation-influences-heart-rate-autonomic-responses-to-endodontic-treatment
#13
Milana Drumond Ramos Santana, Eli Carlos Martiniano, Larissa Raylane Lucas Monteiro, Vitor E Valenti, David M Garner, Isabel Cristina Esposito Sorpreso, Luiz Carlos de Abreu
We aimed to evaluate the acute effect of musical auditory stimulation on heart rate autonomic regulation during endodontic treatment. The study included 50 subjects from either gender between 18 and 40 years old, diagnosed with irreversible pulpitis or pulp necrosis of the upper front teeth and endodontic treatment indication. HRV was recorded 10 minutes before (T1), during (T2), and immediately (T3 and T4) after endodontic treatment. The volunteers were randomly divided into two equal groups: exposed to music (during T2, T3, and T4) or not...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28181926/autonomic-nervous-system-function-after-a-skin-to-skin-contact-intervention-in-infants-with-congenital-heart-disease
#14
Tondi M Harrison, Roger Brown
BACKGROUND: Infants with complex congenital heart disease (CCHD) demonstrate impaired autonomic nervous system (ANS) regulation, which may contribute to commonly observed impairments in feeding, growth, and development. Close mother-infant physical contact improves ANS function in other high-risk infant populations. OBJECTIVE: Our purposes were to examine feasibility of a 2-week daily skin-to-skin contact (SSC) intervention and to describe change in ANS function in response to the intervention...
February 9, 2017: Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/28181276/modulation-of-autonomic-nervous-activity-in-the-termination-of-paroxysmal-atrial-fibrillation
#15
Jen-Hung Huang, Yung-Kuo Lin, Ming-Hsiung Hsieh, Shih-Ann Chen, Wan-Chun Chiu, Yi-Jen Chen
BACKGROUND: Autonomic nervous activity plays a critical role in the genesis of paroxysmal atrial fibrillation (AF, PAF). However, the role of autonomic nervous activity on AF termination has not been elucidated. Heart rate variability (HRV) is widely used to evaluate autonomic nervous activity in humans. The purpose of this study was to assess whether autonomic nervous activity assessed by HRV contributes to AF termination. METHODS: Electrocardiograms (ECGs) and HRV were studied in patients with termination of sustained (>30 s) PAF by 24-h ambulatory Holter monitoring...
February 9, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28174525/cardiac-signals-are-independently-associated-with-temporal-discounting-and-time-perception
#16
Bowen J Fung, Damien L Crone, Stefan Bode, Carsten Murawski
Cardiac signals reflect the function of the autonomic nervous system (ANS) and have previously been associated with a range of self-regulatory behaviors such as emotion regulation and memory recall. It is unknown whether cardiac signals may also be associated with self-regulation in the temporal domain, in particular impulsivity. We assessed both decision impulsivity (temporal discounting, TD) and time perception impulsivity (duration reproduction, DR) in 120 participants while they underwent electrocardiography in order to test whether cardiac signals were related to these two aspects of impulsivity...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28167918/quantifying-effects-of-pharmacological-blockers-of-cardiac-autonomous-control-using-variability-parameters
#17
Renata Miyabara, Karsten Berg, Jan F Kraemer, Ovidiu C Baltatu, Niels Wessel, Luciana A Campos
Objective: The aim of this study was to identify the most sensitive heart rate and blood pressure variability (HRV and BPV) parameters from a given set of well-known methods for the quantification of cardiovascular autonomic function after several autonomic blockades. Methods: Cardiovascular sympathetic and parasympathetic functions were studied in freely moving rats following peripheral muscarinic (methylatropine), β1-adrenergic (metoprolol), muscarinic + β1-adrenergic, α1-adrenergic (prazosin), and ganglionic (hexamethonium) blockades...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28159399/particulate-and-gaseous-pollutants-on-inflammation-thrombosis-and-autonomic-imbalance-in-subjects-at-risk-for-cardiovascular-disease
#18
Szu-Ying Chen, Chang-Chuan Chan, Ta-Chen Su
This study examined effects of short-term urban air pollution exposures on inflammation, thrombosis, and autonomic imbalance in subjects at risk for cardiovascular disease (CVD). We enrolled 61 patients with multiple CVD risk factors and measured high sensitive C-reactive protein (hs-CRP), fibrinogen, D-dimer, and heart rate variability (HRV) indices. Two health examinations for each participant were performed during December 2002 through September 2003. Changes in inflammation and thrombotic markers and HRV indices with exposures to PM2...
April 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28155673/cerebral-and-neural-regulation-of-cardiovascular-activity-during-mental-stress
#19
Xiaoni Wang, Binbin Liu, Lin Xie, Xiaolin Yu, Mengjun Li, Jianbao Zhang
BACKGROUND: Mental arithmetic has been verified inducing cerebral and cardiovascular responses. However, the mechanism and sequential responses are still ambiguous. This study aims to reveal the mechanism of cardiovascular and autonomic responses and the related scalp positions that regulate the autonomic nerves system (ANS) during MA task. METHODS: 34 healthy male subjects aged between 19 and 27 years old (mean age 23.6 ± 2.3 years) were recruited in. Electrocardiogram, impedance cardiography, beat-to-beat blood pressure and electroencephalography were measured simultaneously and continuously during the experiments...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28153217/nocturnal-heart-rate-variation-in-diabetic-and-non-diabetic-patients%C3%A2-with-sleep-apnea-syndrome
#20
Babak Amra, Mohaddeseh Behjati, Thomas Penzel, Ingo Fietze, Christoph Schoebel, Nizal Sarrafzadegan
OBJECTIVES: Heart rate variability (HRV) analysis is used for the evaluation of autonomic function in the cardiovascular system. Decreased HRV is associated with disorders affecting the autonomous system such as diabetes mellitus (DM) and obstructive sleep apnea (OSA). Previous studies have shown an association between OSA and DM. However, the interrelationships of HRV with OSA and DM are not well known. The aim of this study was to assess nocturnal HRV in patients who suffered from OSA with and without DM...
January 2017: Sleep Medicine
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