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heart rate variability and sleep

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https://www.readbyqxmd.com/read/28812280/effect-of-missing-inter-beat-interval-data-on-heart-rate-variability-analysis-using-wrist-worn-wearables
#1
Hyun Jae Baek, JaeWook Shin
Most of the wrist-worn devices on the market provide a continuous heart rate measurement function using photoplethysmography, but have not yet provided a function to measure the continuous heart rate variability (HRV) using beat-to-beat pulse interval. The reason for such is the difficulty of measuring a continuous pulse interval during movement using a wearable device because of the nature of photoplethysmography, which is susceptible to motion noise. This study investigated the effect of missing heart beat interval data on the HRV analysis in cases where pulse interval cannot be measured because of movement noise...
August 15, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28810362/effect-of-exercise-training-in-heart-rate-variability-anxiety-depression-and-sleep-quality-in-kidney-recipients-a-preliminary-study
#2
Rodrigo Barroso, Antonio C Silva-Filho, Carlos José Dias, Nivaldo Soares, Alessandra Mostarda, Luana Anaisse Azoubel, Leandro Melo, Alessandra de Mc Garcia, Bruno Rodrigues, Cristiano Texeira Mostarda
The aim of this study was to compare the sleep quality, depression, anxiety, and autonomic function of a group of kidney-transplanted recipients who joined a combined exercise program (KTRt) or remained sedentary (KTRs). A total of 20 kidney-transplanted recipients, split into two groups (10 KTRt and 10 KTRs), joined the study. Heart rate variability, cardiorespiratory capacity, depression, and sleep questionnaires were evaluated. KTRt presented lower Pittsburgh Sleep Quality Index and greater entropy, and increased parasympathetic and decreased sympathetic modulation than KTRs...
November 1, 2016: Journal of Health Psychology
https://www.readbyqxmd.com/read/28802811/effects-of-respiratory-training-on-heart-rate-variability-and-baroreflex-sensitivity-in-individuals-with-chronic-spinal-cord-injury
#3
Bonnie E Legg Ditterline, Sevda C Aslan, David C Randall, Susan J Harkema, Camilo Castillo, Alexander V Ovechkin
OBJECTIVE: To evaluate the effects of pressure threshold respiratory training (RT) on heart rate variability and baroreflex sensitivity in persons with chronic spinal cord injury (SCI). DESIGN: Before-after intervention case-controlled clinical study. SETTING: SCI research center and outpatient rehabilitation unit. PARTICIPANTS: Persons with chronic SCI ranging from C2 to T11 that participated in RT (n=24) and untrained chronic SCI controls ranging from C2 to T9 (n=20)...
August 9, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28798255/benefits-of-oxytocin-administration-in-obstructive-sleep-apnea
#4
Vivek Jain, Joseph Marbach, Shawn Kimbro, David C Andrade, Arad Jain, Eleanor Capozzi, Kyle Mele, Rodrigo Del Rio, Matthew W Kay, David Mendelowitz
Activation of oxytocin receptors has shown benefits in animal models of Obstructive Sleep Apnea (OSA). We tested if nocturnal oxytocin administration could have beneficial effects in OSA patients. 8 patients diagnosed with OSA were administered intranasal oxytocin (40 i.u.). Changes in cardiorespiratory events during sleep, including apnea and hypopnea durations and frequency, risk of event-associated arousals, and heart rate variability were assessed. Oxytocin significantly increased indices of parasympathetic activity, including heart rate variability, total sleep time, and the Post-Polysommogram Sleep Assessment (PPSA) score, an index of self-reported sleep satisfaction...
August 10, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28755803/sleep-in-infants-with-congenital-myasthenic-syndromes
#5
Serena Caggiano, Sonia Khirani, Elisabetta Verrillo, Christine Barnerias, Alessandro Amaddeo, Cyril Gitiaux, Briac Thierry, Isabelle Desguerre, Renato Cutrera, Brigitte Fauroux
BACKGROUND AND OBJECTIVES: Infants with congenital myasthenic syndrome (CMS) are at risk of brief resolved unexplained event (BRUE) and sleep-disordered breathing. The aim of the study was to explore sleep in infants with CMS with a particular focus on heart rate (HR) variability. METHODS: Overnight polygraphy was performed and HR variations associated with respiratory events were analysed. Bradycardia and tachycardia were defined as a variation of HR of ±10 bpm from baseline and analysed as events/hour...
July 21, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28749715/insomnia-and-autonomic-function-predict-well-being-in-patients-receiving-palliative-care
#6
Marco Warth, Jens Kessler, Hubert J Bardenheuer
BACKGROUND: The improvement of health-related quality of life (HRQOL) is one of the main treatment goals in end-of-life care. Although definitions and conceptualizations remain heterogeneous, many researchers proposed HRQOL to be considered as subjective patient well-being. However, research on its determinants in palliative care is rare, and little is known about the interplay between psychological and biological variables. OBJECTIVE: The aim of this study was to explain differences in terminally ill patients' acute well-being (AWB) by use of a multimethod approach, examining both self-ratings and physiological predictors...
July 27, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28733087/unobtrusive-assessment-of-neonatal-sleep-state-based-on-heart-rate-variability-retrieved-from-electrocardiography-used-for-regular-patient-monitoring
#7
Jan Werth, Xi Long, Elly Zwartkruis-Pelgrim, Hendrik Niemarkt, Wei Chen, Ronald M Aarts, Peter Andriessen
As an approach of unobtrusive assessment of neonatal sleep state we aimed at an automated sleep state coding based only on heart rate variability obtained from electrocardiography used for regular patient monitoring. We analyzed active and quiet sleep states of preterm infants between 30 and 37weeks postmenstrual age. To determine the sleep states we used a nonlinear kernel support vector machine for sleep state separation based on known heart rate variability features. We used unweighted and weighted misclassification penalties for the imbalanced distribution between sleep states...
July 18, 2017: Early Human Development
https://www.readbyqxmd.com/read/28715584/reduced-retinal-vessel-density-in-obstructive-sleep-apnea-syndrome-patients-an-optical-coherence-tomography-angiography-study
#8
Jian Yu, Kuanlin Xiao, Jingjing Huang, Xinghuai Sun, Chunhui Jiang
Purpose: To examine the retinal vasculature in patients with obstructive sleep apnea-hypopnea syndrome (OSAS) and to determine the correlation between retinal vascularity and the severity of OSAS. Design: Prospective, cross-sectional study. Methods: Sixty-nine consecutive subjects who underwent polysomnography were enrolled. Patients were divided into three groups according to the severity of OSAS, which was defined using the apnea-hypopnea index (AHI) as normal-to-mild (AHI <15), moderate (≥15 to <30), or severe (≥30)...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28680341/effects-of-sleep-deprivation-on-cognitive-and-physical-performance-in-university-students
#9
Yusuf Patrick, Alice Lee, Oishik Raha, Kavya Pillai, Shubham Gupta, Sonika Sethi, Felicite Mukeshimana, Lothaire Gerard, Mohammad U Moghal, Sohag N Saleh, Susan F Smith, Mary J Morrell, James Moss
Sleep deprivation is common among university students, and has been associated with poor academic performance and physical dysfunction. However, current literature has a narrow focus in regard to domains tested, this study aimed to investigate the effects of a night of sleep deprivation on cognitive and physical performance in students. A randomized controlled crossover study was carried out with 64 participants [58% male (n = 37); 22 ± 4 years old (mean ± SD)]. Participants were randomized into two conditions: normal sleep or one night sleep deprivation...
2017: Sleep and Biological Rhythms
https://www.readbyqxmd.com/read/28676763/sleep-deprivation-in-young-and-healthy-subjects-is-more-sensitively-identified-by-higher-frequencies-of-electrodermal-activity-than-by-skin-conductance-level-evaluated-in-the-time-domain
#10
Hugo F Posada-Quintero, Jeffrey B Bolkhovsky, Natasa Reljin, Ki H Chon
We analyzed multiple measures of the autonomic nervous system (ANS) based on electrodermal activity (EDA) and heart rate variability (HRV) for young healthy subjects undergoing 24-h sleep deprivation. In this study, we have utilized the error awareness test (EAT) every 2 h (13 runs total), to evaluate the deterioration of performance. EAT consists of trials where the subject is presented words representing colors. Subjects are instructed to press a button ("Go" trials) or withhold the response if the word presented and the color of the word mismatch ("Stroop No-Go" trial), or the screen is repeated ("Repeat No-Go" trials)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28675811/effects-of-expansion-sphincter-pharyngoplasty-on-the-apnea-hypopnea-index-and-heart-rate-variability
#11
Ahmet Emre Süslü, Gözde Pamuk, Ahmet Erim Pamuk, Serdar Özer, Shamkhal Jafarov, T Metin Önerci
PURPOSE: Heart rate variability (HRV) is a noninvasive and sensitive method used to evaluate autonomic function of the heart based on specific polysomnographic parameters. This study aimed to determine the effect of expansion sphincter pharyngoplasty (ESP) on HRV and the apnea-hypopnea index (AHI) in patients with obstructive sleep apnea (OSA). MATERIALS AND METHODS: This retrospective cohort study included patients who presented to the Department of Otorhinolaryngology, Hacettepe University Hospital (Ankara, Turkey), were diagnosed with OSA, and underwent ESP...
June 10, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28662007/-evaluation-of-sleep-apnea-detected-by-24-hour-ecg-holter-monitoring-analysis-in-patients-with-stable-coronary-artery-disease-and-ischemic-heart-failure-correlations-with-clinical-data
#12
Magdalena Frączek-Jucha, Paweł Rostoff, Jacek Łach, Jadwiga Nessler, Andrzej Gackowski
Obstructive sleep apnoea (OSA) is frequently undiagnosed in patients with heart failure (HF) and coronary artery disease (CAD). Simple and widely available screening tests are needed to diagnose patients with SA. Measurements of thoracic impedance and heart rate variability during 24-hour ECG Holter (H-EKG) monitoring allows to calculate estimated apnoea-hypopnoea index (eAHI). AIM: The aim of the research was to assess prevalence of OSA evaluated with the use of H-EKG and determination of its clinical relevance in patients with CAD and ischeamic HF...
June 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28657825/effectiveness-of-tai-chi-on-cardiac-autonomic-function-and-symptomatology-in-women-with-fibromyalgia-a-randomized-controlled-trial
#13
Alexei Wong, Arturo Figueroa, Marcos A Sanchez-Gonzalez, Won-Mok Son, Oksana Chernykh, Song-Young Park
The present study examined the effects of a 12-week Tai Chi (TC) training regimen on heart rate variability (HRV), symptomatology, muscle fitness and body composition in women with fibromyalgia. Participants were randomly assigned to either a TC training group (n=18) or a control group (n=19). HRV, symptomatology, muscle fitness and body composition were measured before and after 12 weeks. There were significant decreases (P<0.05) in sympathovagal balance (LnLF/LnHF), sympathetic tone (LnLF, nLF), pain, fatigue and significant increases (P<0...
June 28, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28649873/can-you-snooze-your-way-to-an-a-exploring-the-complex-relationship-between-sleep-autonomic-activity-wellbeing-and-performance-in-medical-students
#14
Erin Cvejic, Shiny Huang, Uté Vollmer-Conna
OBJECTIVE: Medical training brings with it multiple stressors, including demanding workloads in highly competitive environments, with well-documented impact on psychiatric morbidity. This study evaluated the impact of sleep-related factors on psychological wellbeing, cognitive task performance and academic standing in medical students. METHODS: A total of 59 undergraduate medical students took part in this cross-sectional study over two consecutive days. Participants responded to questionnaires about their physical and psychological health, sleep, functioning and academic performance at the initial visit...
June 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/28605521/recorded-and-reported-sleepiness-the-association-between-brain-arousal-in-resting-state-and-subjective-daytime-sleepiness
#15
Philippe Jawinski, Jennifer Kittel, Christian Sander, Jue Huang, Janek Spada, Christine Ulke, Kerstin Wirkner, Tilman Hensch, Ulrich Hegerl
Objectives: Daytime sleepiness is a significant public health concern. Early evidence points towards the computerized VIGALL (Vigilance Algorithm Leipzig) as time-efficient tool to assess sleepiness objectively. In the present study, we investigated the association between VIGALL variables of EEG-vigilance (indicating brain arousal in resting state) and subjective daytime sleepiness in the LIFE cohort study. Additionally, we validated VIGALL against the self-rated likelihood of having fallen asleep during the conducted resting EEG and against heart periods...
June 12, 2017: Sleep
https://www.readbyqxmd.com/read/28591754/changes-in-sleep-architecture-under-sustained-pain-in-adult-male-rats-subjected-to-neonatal-short-lasting-local-inflammatory-insult
#16
Cheryl C H Yang, Shiang-Suo Huang, Chun-Ting Lai, Terry B J Kuo, Ya-Chun Chu
Neonatal, short-lasting, local, nociceptive insult by carrageenan can cause long-term alterations in somatosensory and neurohumoral systems. We previously revealed hyporesponsiveness of the autonomic nervous system (ANS) after painful stimulation of adult rats in a neonatal carrageenan-induced pain model. Sleep disturbance has been highly correlated with pain and ANS activity. In the present study, adult rats that had received an intraplantar injection of carrageenan on postnatal day 1 were investigated to determine if there were alterations in their sleep architecture upon the stimulation of pain...
June 8, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28576852/neurocardiovascular-deficits-in-the-q175-mouse-model-of-huntington-s-disease
#17
Tamara S Cutler, Saemi Park, Dawn H Loh, Maria C Jordan, Tomohiro Yokota, Kenneth P Roos, Cristina A Ghiani, Christopher S Colwell
Cardiovascular dysautonomia as well as the deterioration of circadian rhythms are among the earliest detectable pathophysiological changes in individuals with Huntington's disease (HD). Preclinical research requires mouse models that recapitulate disease symptoms and the Q175 knock-in model offers a number of advantages but potential autonomic dysfunction has not been explored. In this study, we sought to test the dual hypotheses that cardiovascular dysautonomia can be detected early in disease progression in the Q175 model and that this dysfunction varies with the daily cycle...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28576734/protocol-for-the-match-study-mindfulness-and-tai-chi-for-cancer-health-a-preference-based-multi-site-randomized-comparative-effectiveness-trial-cet-of-mindfulness-based-cancer-recovery-mbcr-vs-tai-chi-qigong-tcq-for-cancer-survivors
#18
Linda E Carlson, Erin L Zelinski, Michael Speca, Lynda G Balneaves, Jennifer M Jones, Daniel Santa Mina, Peter M Wayne, Tavis S Campbell, Janine Giese-Davis, Peter Faris, Jennifer Zwicker, Kamala Patel, Tara L Beattie, Steve Cole, Kirsti Toivonen, Jill Nation, Philip Peng, Bruce Thong, Raimond Wong, Sunita Vohra
PURPOSE: A growing number of cancer survivors suffer high levels of distress, depression and stress, as well as sleep disturbance, pain and fatigue. Two different mind-body interventions helpful for treating these problems are Mindfulness-Based Cancer Recovery (MBCR) and Tai Chi/Qigong (TCQ). However, while both interventions show efficacy compared to usual care, they have never been evaluated in the same study or directly compared. This study will be the first to incorporate innovative design features including patient choice while evaluating two interventions to treat distressed cancer survivors...
May 30, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28570433/trauma-and-autonomic-dysregulation-episodic-versus-systemic-negative-affect-underlying-cardiovascular-risk-in-posttraumatic-stress-disorder
#19
Paul A Dennis, Nathan A Kimbrel, Andrew Sherwood, Patrick S Calhoun, Lana L Watkins, Michelle F Dennis, Jean C Beckham
OBJECTIVE: Posttraumatic stress disorder (PTSD) has been linked to elevated heart rate (HR) and reduced heart rate variability (HRV) in cross-sectional research. Recent evidence suggests that this link may be driven by individual differences in autonomic arousal associated with momentary negative affect (NA). Using ecological momentary assessment (EMA) of NA and minute-to-minute HR/HRV monitoring, we examined whether NA-related HR/HRV mediated the association of PTSD symptom severity with 24-hour HRV and endothelial functioning...
June 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28557555/effect-of-obstructive-sleep-apnea-on-the-response-to-hypertension-therapy
#20
Michael G Ziegler, Milos Milic, Xiaojiong Lu, Munir Gharaibeh, Hamzeh Elayan
Obstructive sleep apnea (OSA) often precedes cardiovascular disease, partly due to treatment resistant hypertension. The nocturnal apneas of OSA trigger increased sympathetic nervous discharge during both sleep and wakefulness. Apneas also trigger cardiac release of the endogenous diuretic atrial natriuretic peptide. We hypothesized that treatment of the excess sympathetic nervous activity of OSA with a β1 blocker would lower 24 h blood pressure (BP) more than diuretic therapy. Subjects with OSA associated hypertension received 2 weeks of placebo followed by the β1 blocker nebivolol or hydrochlorothiazide (HCTZ) for 6 weeks in a blinded crossover study...
2017: Clinical and Experimental Hypertension: CHE
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