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https://www.readbyqxmd.com/read/28325020/socioeconomic-status-age-and-heart-rate-variability-in-a-bangladeshi-community
#1
Nishat E-Sharmin Trisha, Herbert F Jelinek, Mika P Tarvainen, David J Cornforth, Dewan S Alam, Megan Smith
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/28325016/sleep-stage-classification-by-non-contact-vital-signs-indices-using-doppler-radar-sensors
#2
Masayuki Kagawa, Kazuki Suzumura, Takemi Matsui
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/28323625/the-effects-of-stretching-training-on-cardiac-autonomic-function-in-obese-postmenopausal-women
#3
Alexei Wong, Marcos Sanchez-Gonzalez, Roy Kalfon, Stacey Alvarez-Alvarado, Arturo Figueroa
Context • Menopause and obesity are associated with autonomic dysfunction. Unconventional exercise modalities that include an important flexibility component seem to improve cardiac autonomic function by lowering sympathetic tone and increasing vagal modulation of the heart rate (HR). Yet clear evidence of the effects of stretching training (ST) on cardiac autonomic modulation is limited. Objective • The present study intended to examine the effects of ST on HR variability (HRV) and flexibility in obese postmenopausal women...
March 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28315879/heart-rate-variability-predicts-major-adverse-cardiovascular-events-and-hospitalization-in-maintenance-hemodialysis-patients
#4
Jiun-Chi Huang, I-Ching Kuo, Yi-Chun Tsai, Jia-Jung Lee, Lee-Moay Lim, Szu-Chia Chen, Yi-Wen Chiu, Jer-Ming Chang, Hung-Hun Chen
BACKGROUND/AIMS: Heart rate variability (HRV) has been linked to mortality in maintenance hemodialysis (HD) patients, but it is less clear whether HRV is associated with major adverse cardiovascular events (MACEs) and hospitalization. METHODS: This study enrolled 179 maintenance HD patients. HRV was measured to assess its prognostic significance in relation to MACEs and hospitalization. RESULTS: During the follow-up period of 33.3 ± 6.7 months, 36 (20...
March 17, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/28303846/heart-rate-variability-in-patients-with-acute-ischemic-stroke-at-different-stages-of-renal-dysfunction-a-cross-sectional-observational-study
#5
Lin Wei, Wen-Bo Zhao, Huan-Wen Ye, Yan-Hua Chen, Xiao-Pei Zhang, Yan Huang, Ye-Feng Cai, Quan-Fu Chen, Su-Yue Pan
BACKGROUND: Renal function is associated with mortality and functional disabilities in stroke patients, and impaired autonomic function is common in stroke, but little is known regarding its effects on stroke patients with renal dysfunction. This study sought to evaluate the association between autonomic function and stroke in patients with renal dysfunction. METHODS: This study comprised 232 patients with acute ischemic stroke consecutively enrolled from February 2013 to November 2014 at Guangdong Provincial Hospital of Chinese Medicine in China...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28302058/effects-of-stroke-on-changes-in-heart-rate-variability-during-hemodialysis
#6
Jiun-Chi Huang, Chien-Fu Chen, Chia-Chu Chang, Szu-Chia Chen, Ming-Chia Hsieh, Yao-Peng Hsieh, Hung-Chun Chen
BACKGROUND: Stroke and low heart rate variability (HRV) are both associated with an unfavorable prognosis in hemodialysis patients. The relationship between stroke and changes in HRV during hemodialysis remains unclear. METHODS: This study measured differences between predialysis and postdialysis HRV (△HRV) in 182 maintenance hemodialysis patients, including 30 patients with stroke, to assess changes in HRV during hemodialysis, and also to compare results to 114 healthy controls...
March 16, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28282844/transcranial-direct-current-stimulation-in%C3%A2-individuals-with-spinal-cord-injury-assessment-of-autonomic-nervous-system-activity
#7
Fabiana Tenório Gomes da Silva, Rodrigo Alberto Vieira Browne, Camila Bonin Pinto, Faddi Ghassan Saleh Velez, Eryvaldo Sócrates Tabosa do Egito, Jeferson Tafarel Pereira do Rêgo, Marília Rodrigues da Silva, Paulo Moreira Silva Dantas, Felipe Fregni
BACKGROUND: We hypothesized in this study that transcranial direct current stimulation (tDCS) of primary motor cortex could exert top-down modulation over subcortical systems associated with autonomic control and thus be useful to revert some of the dysfunctional changes found in the autonomic nervous system (ANS) of subjects with spinal cord injuries (SCI). OBJECTIVE: To explore the acute effect of tDCS on ANS indexed by Heart Rate Variability (HRV) in individuals with SCI and analyze whether this effect depends on the gender, degree, level and time of injury...
March 9, 2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28281386/effects-of-depression-and-melatonergic-antidepressant-treatment-alone-and-in-combination-with-sedative-hypnotics-on-heart-rate-variability-implications-for-cardiovascular-risk
#8
Chuan-Chia Chang, Nian-Sheng Tzeng, Chin-Bin Yeh, Terry B J Kuo, San-Yuan Huang, Hsin-An Chang
OBJECTIVES: To examine heart rate variability (HRV) in unmedicated patients with major depressive disorder (MDD) and its changes after treatment with agomelatine alone and in combination with sedative-hypnotics. METHODS: We recruited 152 physically healthy, unmedicated patients with MDD and 472 age- and sex-matched healthy volunteers. Frequency-domain measures of HRV were obtained during enrolment for all participants and again for MDD patients after 6 weeks of treatment with agomelatine alone and combining sedative-hypnotics...
March 10, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28276066/stress-vulnerability-in-adolescents-with-chronic-fatigue-syndrome-experimental-study-investigating-heart-rate-variability-and-skin-conductance-responses
#9
Katharine A Rimes, Kate Lievesley, Trudie Chalder
BACKGROUND: Stress vulnerability has been implicated in adolescent chronic fatigue syndrome (CFS), but has rarely been investigated directly. This study compared psychological and physiological responses to a laboratory social performance task in adolescents with CFS with chronic illness (asthma) and healthy control groups. METHODS: Adolescents with CFS (n = 60), adolescents with asthma (n = 31) and healthy adolescents (n = 78) completed questionnaires before and after a social performance task...
March 9, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28270938/acupuncture-attenuates-renal-sympathetic-activity-and-blood-pressure-via-beta-adrenergic-receptors-in-spontaneously-hypertensive-rats
#10
Jing-Wen Yang, Yang Ye, Xue-Rui Wang, Fang Li, Ling-Yong Xiao, Guang-Xia Shi, Cun-Zhi Liu
The sympathetic nervous system, via epinephrine and norepinephrine, regulates β-adrenergic receptor (β-AR) expression, and renal sympathetic activation causes sustained increases in blood pressure by enhanced renin release. In this study, we aim to investigate the effect and underlying mechanism of acupuncture at Taichong (LR3) on renal sympathetic activity in spontaneously hypertensive rats. Unanesthetized rats were subject to daily acupuncture for 2 weeks. Mean blood pressure (MBP) and heart rate variability (HRV) were monitored at days 0, 7, and 14 by radiotelemetry...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28270165/clinical-and-epidemiological-profiles-including-meteorological-factors-of-low-respiratory-tract-infection-due-to-human-rhinovirus-in-hospitalized-children
#11
Yongdong Yan, Li Huang, Meijuan Wang, Yuqing Wang, Wei Ji, Canhong Zhu, Zhengrong Chen
BACKGROUND: Lower respiratory tract infection (LRTI) is a major cause of morbidity and mortality in children. Human rhinovirus (HRV) is confirmed to be associated with pediatric lower respiratory tract infection. Seasonal and meteorological factors may play a key role in the epidemiology of HRV. The purposes of this study were to investigate the frequency, seasonal distribution, and clinical characteristics of hospitalized children with LRTI caused by HRVs. In addition, associations between incidence of HRVs and meteorological factors in a subtropical region of China were discussed...
March 7, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28269672/long-range-correlations-in-amplitude-variability-of-hf-and-lf-components-of-heart-rate-variability
#12
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/28269356/real-time-physiological-and-facial-monitoring-for-safe-driving
#13
Yu-Lung Chang, Yen-Cheng Feng, Oscal T-C Chen
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/28268477/disentanglement-of-sympathetic-and-parasympathetic-activity-by-instantaneous-analysis-of-human-heartbeat-dynamics
#14
Gaetano Valenza, Luca Citi, Riccardo Barbieri
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/28255249/association-between-obesity-and-heart-rate-variability-indices-an-intuition-toward-cardiac-autonomic-alteration-a-risk-of-cvd
#15
Ram Lochan Yadav, Prakash Kumar Yadav, Laxmi Kumari Yadav, Kopila Agrawal, Santosh Kumar Sah, Md Nazrul Islam
BACKGROUND: Obese people have a higher prevalence of cardiovascular disease, which is supposed to be due to autonomic dysfunction and/or metabolic disorder. The alterations in cardiac autonomic functions bring out the changes in the heart rate variability (HRV) indicators, an assessing tool for cardiac autonomic conditions. OBJECTIVE: To compare the cardiac autonomic activity between obese and normal weight adults and find out the highest association between the indices of HRV and obesity...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
https://www.readbyqxmd.com/read/28252659/inflammatory-cytokine-response-and-reduced-heart-rate-variability-in-newborns-with-hypoxic-ischemic-encephalopathy
#16
T Al-Shargabi, R B Govindan, R Dave, M Metzler, Y Wang, A du Plessis, A N Massaro
OBJECTIVE: To determine whether systemic inflammation-modulating cytokine expression is related to heart rate variability (HRV) in newborns with hypoxic-ischemic encephalopathy (HIE). STUDY DESIGN: The data from 30 newborns with HIE were analyzed. Cytokine levels (IL-2, IL-4, IL-6, IL-8, IL-10, IL-13, IL-1β, TNF-α, IFN-λ) were measured either at 24 h of cooling (n=5), 72 h of cooling (n=4) or at both timepoints (n=21). The following HRV metrics were quantified in the time domain: alpha_S, alpha_L, root mean square (RMS) at short time scales (RMS_S), RMS at long time scales (RMS_L), while low-frequency power (LF) and high-frequency power (HF) were quantified in the frequency domain...
March 2, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28251400/effects-of-rapid-ascent-on-the-heart-rate-variability-of-individuals-with-and-without-acute-mountain-sickness
#17
Ming Ling Yih, Fang-Chi Lin, Heng-Sheng Chao, Han-Chen Tsai, Shi-Chuan Chang
PURPOSE: Through time- and frequency-domain analysis, we compared the effects of acute hypobaric hypoxia on the changes in heart rate variability (HRV) following night sleeping and morning awakening in individuals with and without acute mountain sickness (AMS). METHOD: Thirty-nine nonacclimatised healthy individuals were transported by bus from sea level to 3150 m within 3 h. Short-term HRV was measured two times a day-before sleeping (BS) and after awakening (AA)- at 3 days before ascent (T0), two consecutive nights at 3150 m (T1 and T2), and 2 days after descent (T3)...
March 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28249028/heart-rate-variability-during-hemodialysis-is-an-indicator-for-long-term-vascular-access-survival-in-uremic-patients
#18
Ya-Ting Huang, Yu-Ming Chang, I-Ling Chen, Chuan-Lan Yang, Show-Chin Leu, Hung-Li Su, Jsun-Liang Kao, Shih-Ching Tsai, Rong-Na Jhen, Woung-Ru Tang, Chih-Chung Shiao
BACKGROUND: Vascular access (VA) is the lifeline of hemodialysis patients. Although the autonomic nervous system might be associated with VA failure (VAF), it has never been addressed in previous studies. This study aimed to evaluate the predictive values of the heart rate variability (HRV) indices for long-term VA outcomes. METHODS: This retrospective study was conducted using a prospectively established cohort enrolling 175 adult chronic hemodialysis patients (100 women, mean age 65...
2017: PloS One
https://www.readbyqxmd.com/read/28239850/depressive-symptomology-in-multiple-sclerosis-disability-cardiorespiratory-fitness-and-heart-rate-variability
#19
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
#20
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
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