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heart rate variability and sleep

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https://www.readbyqxmd.com/read/28715584/reduced-retinal-vessel-density-in-obstructive-sleep-apnea-syndrome-patients-an-optical-coherence-tomography-angiography-study
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/28548300/first-night-effect-on-cardiac-autonomic-function-in-different-female-reproductive-states
#14
Irina Virtanen, Nea Kalleinen, Anna S Urrila, Päivi Polo-Kantola
Decreases in heart rate variability, a marker of autonomic nervous system function, are associated with increased cardiovascular mortality. Heart rate variability increases in non-rapid eye movement sleep, peaking in slow-wave sleep. Therefore, decreasing the amount of deep sleep, for example, by introducing patients to a sleep laboratory environment, could decrease heart rate variability, increasing cardiovascular risk. We studied four groups of women with no previous sleep laboratory experience: young [n = 11, 23...
May 26, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28544507/the-effect-of-binaural-beat-technology-on-the-cardiovascular-stress-response-in-military-service-members-with-postdeployment-stress
#15
MeLisa A Gantt, Stephanie Dadds, Debra S Burns, Dale Glaser, Angelo D Moore
PURPOSE: To assess the efficacy of embedded theta brainwave frequency in music using binaural beat technology (BBT) compared to music alone on the cardiovascular stress response in military service members with postdeployment stress. DESIGN: A double-blinded, randomized, pre- and postintervention trial. METHODS: Seventy-four military services members with complaint of postdeployment stress were randomized to either music with BBT or music alone...
July 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28539087/artificial-intelligence-methodologies-and-their-application-to-diabetes
#16
Mercedes Rigla, Gema García-Sáez, Belén Pons, Maria Elena Hernando
In the past decade diabetes management has been transformed by the addition of continuous glucose monitoring and insulin pump data. More recently, a wide variety of functions and physiologic variables, such as heart rate, hours of sleep, number of steps walked and movement, have been available through wristbands or watches. New data, hydration, geolocation, and barometric pressure, among others, will be incorporated in the future. All these parameters, when analyzed, can be helpful for patients and doctors' decision support...
May 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28534047/polysomnographic-heart-rate-variability-indices-and-atrial-ectopy-associated-with-incident-atrial-fibrillation-risk-in-older-community-dwelling-men
#17
Dileep Raman, Farhad Kaffashi, Li-Yung Lui, William H Sauer, Susan Redline, Peter Stone, Peggy M Cawthon, Katie L Stone, Kristine E Ensrud, Sonia Ancoli-Israel, Kenneth Loparo, Reena Mehra
BACKGROUND: Autonomic dysfunction contributes to atrial fibrillation (AF). OBJECTIVE: We hypothesized that polysomnogram (PSG)-based heart rate variability (HRV) autonomic function biomarkers are associated with incident AF and these associations are modified by measures of sleep disordered breathing (SDB). METHODS: 2350 participants of a multi-center prospective study (Outcomes of Sleep Disorders in Older Men Study) without baseline AF underwent sleep studies with incident adjudicated AF follow up (8...
May 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/28533739/improving-the-test-retest-reliability-of-resting-state-fmri-by-removing-the-impact-of-sleep
#18
Jiahui Wang, Junwei Han, Vinh T Nguyen, Lei Guo, Christine C Guo
Resting state functional magnetic resonance imaging (rs-fMRI) provides a powerful tool to examine large-scale neural networks in the human brain and their disturbances in neuropsychiatric disorders. Thanks to its low demand and high tolerance, resting state paradigms can be easily acquired from clinical population. However, due to the unconstrained nature, resting state paradigm is associated with excessive head movement and proneness to sleep. Consequently, the test-retest reliability of rs-fMRI measures is moderate at best, falling short of widespread use in the clinic...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28528244/heart-rate-variability-of-chronic-posttraumatic-stress-disorder-in-the-korean-veterans
#19
Joo Eon Park, Ji Yeon Lee, Suk-Hoon Kang, Jin Hee Choi, Tae Yong Kim, Hyung Seok So, In-Young Yoon
Patients with post-traumatic stress disorder (PTSD) have lower heart rate variability (HRV) than the general population, but findings in this area have been inconsistent. This study was conducted to investigate the characteristics of HRV in patients with PTSD and to evaluate associations between PTSD symptoms and HRV indices. Sixty-eight patients with PTSD and 73 controls without PTSD were evaluated. HRV was measured in all subjects after they completed self-reported questionnaires. Patients with PTSD had significantly more depressed moods, anxiety, and poorer sleep quality than individuals in the non-PTSD group...
May 9, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28527014/high-frequency-heart-rate-variability-reactivity-and-trait-worry-interact-to-predict-the-development-of-sleep-disturbances-in-response-to-a-naturalistic-stressor
#20
Sasha MacNeil, Sonya S Deschênes, Warren Caldwell, Melanie Brouillard, Thien-Thanh Dang-Vu, Jean-Philippe Gouin
BACKGROUND: High-frequency heart rate variability (HF-HRV) reactivity was proposed as a vulnerability factor for stress-induced sleep disturbances. Its effect may be amplified among individuals with high trait worry or sleep reactivity. PURPOSE: This study evaluated whether HF-HRV reactivity to a worry induction, sleep reactivity, and trait worry predict increases in sleep disturbances in response to academic stress, a naturalistic stressor. METHOD: A longitudinal study following 102 undergraduate students during an academic semester with well-defined periods of lower and higher academic stress was conducted...
May 19, 2017: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
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