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heart rate variability and sleep

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https://www.readbyqxmd.com/read/29345542/effects-of-late-night-training-on-slow-wave-sleep-episode-and-hour-by-hour-derived-nocturnal-cardiac-autonomic-activity-in-female-soccer-players
#1
Júlio A Costa, João Brito, Fábio Y Nakamura, Eduardo M Oliveira, António N Rebelo
PURPOSE: To assess the sensitivity of nocturnal heart rate variability (HRV) monitoring methods to the effects of late-night soccer training sessions in female athletes. METHODS: Eleven female soccer players competing in the 1st division of the Portuguese soccer league wore HR monitors during night-sleep throughout a one-week competitive in-season microcycle, after late-night training sessions (n = 3) and rest days (n = 3). HRV was analyzed through "slow-wave sleep episode" (SWSE; 10 min duration) and "hour-by-hour" (all the RR intervals recorded throughout the hours of sleep)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29335917/basal-sympathetic-predominance-in-periodic-limb-movements-in-sleep-after-continuous-positive-airway-pressure
#2
Meng-Ni Wu, Chiou-Lian Lai, Ching-Kuan Liu, Chen-Wen Yen, Li-Min Liou, Cheng-Fang Hsieh, Ming-Ju Tsai, Sharon Chia-Ju Chen, Chung-Yao Hsu
PURPOSE: This study investigated the basal autonomic regulation in patients with obstructive sleep apnea (OSA) showing periodic limb movements in sleep (PLMS) emerging after therapy with continuous positive airway pressure (CPAP). METHODS: Data of patients with OSA undergoing a first polysomnography for diagnosis and a second polysomnography for therapy with CPAP were reviewed. Patients with OSA showing PLMS on the first polysomnography were excluded. By using heart rate variability analysis, epochs without any sleep events and continuous effects from the second polysomnography were retrospectively analyzed...
January 15, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29313987/variable-role-of-carotid-bodies-in-cardiovascular-responses-to-exercise-hypoxia-and-hypercapnia-in-spontaneously-hypertensive-rats
#3
Wioletta Pijacka, Pedro L Katayama, Helio C Salgado, Gisele S Lincevicius, Ruy R Campos, Fiona D McBryde, Julian F R Paton
The carotid body has recently emerged as a promising therapeutic target for treating cardiovascular disease, however the potential impact of carotid bodies removal on the dynamic cardiovascular responses to acute stressors such as exercise, hypoxia and hypercapnia in hypertension is an important safety consideration that has not been studied. We first validated a novel surgical approach to selectively resect the carotid bodies bilaterally (CBR) sparing the carotid sinus baroreflex. Second, we evaluated the impact of CBR on the cardiovascular responses to exercise, hypoxia and hypercapnia in the conscious, chronically instrumented spontaneously hypertensive (SH) rats...
January 5, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29302618/time-restricted-feeding-improves-circadian-dysfunction-as-well-as-motor-symptoms-in-the-q175-mouse-model-of-huntington-s-disease
#4
Huei-Bin Wang, Dawn H Loh, Daniel S Whittaker, Tamara Cutler, David Howland, Christopher S Colwell
Huntington's disease (HD) patients suffer from a progressive neurodegeneration that results in cognitive, psychiatric, cardiovascular, and motor dysfunction. Disturbances in sleep/wake cycles are common among HD patients with reports of delayed sleep onset, frequent bedtime awakenings, and fatigue during the day. The heterozygous Q175 mouse model of HD has been shown to phenocopy many HD core symptoms including circadian dysfunctions. Because circadian dysfunction manifests early in the disease in both patients and mouse models, we sought to determine if early intervention that improve circadian rhythmicity can benefit HD and delay disease progression...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29287945/mechanisms-of-pulse-pressure-amplification-dipping-pattern-during-sleep-time-the-safar-study
#5
Antonios A Argyris, Efthimia Nasothimiou, Evaggelia Aissopou, Theodoros G Papaioannou, Yi Zhang, Jacques Blacher, Michel E Safar, Petros P Sfikakis, Athanase D Protogerou
The difference in pulse pressure (PP) between peripheral arteries and the aorta, called pulse pressure amplification (PPamp), is a well-described physiological phenomenon independently associated with cardiovascular events. Recent studies suggest that it exhibits circadian variability. Our aim was to detect the factors associated with the circadian variability of PPamp. In 497 consecutive subjects (aged 54 years, 56.7% male, 79.7% hypertensives), we assessed the circadian pattern of peripheral and central arterial hemodynamics by 24-hour evaluation of brachial and aortic blood pressure (BP), augmentation index (AI), and pulse wave velocity (PWV) using a validated oscillometric device (Mobil-O-Graph)...
December 14, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29247273/live-high-train-low-guided-by-daily-heart-rate-variability-in-elite-nordic-skiers
#6
Laurent Schmitt, Sarah J Willis, Anthony Fardel, Nicolas Coulmy, Gregoire P Millet
PURPOSE: To analyze if live high-train low (LHTL) effectiveness is improved when daily training is guided by heart rate variability (HRV). METHODS: Twenty-four elite Nordic skiers took part in a 15-day LHTL study and were randomized into a HRV-guided training hypoxic group (H-HRV, n = 9, sleeping in normobaric hypoxia, FiO2 = 15.0%) and two predefined training groups sleeping either in hypoxia (H, n = 9, FiO2 = 15.0%) or normoxia (N, n = 6). HRV and training loads (TL) were recorded daily...
December 15, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29246267/autonomic-nervous-system-functioning-related-to-nocturnal-sleep-in-patients-with-chronic-fatigue-syndrome-compared-to-tired-controls
#7
Maija Orjatsalo, Anniina Alakuijala, Markku Partinen
STUDY OBJECTIVES: Autonomic nervous system (ANS) dysfunction is common in chronic fatigue syndrome (CFS). One of the main complaints in CFS is unrefreshing sleep. We aimed to study the nocturnal cardiac ANS in different sleep stages in patients filling the 2015 Institute of Medicine CFS diagnostic criteria. METHODS: In this case series study, the nocturnal heart rate variability and blood pressure (BP) variables in polysomnography were studied in groups of patients with CFS (n = 8) and tired controls (n = 8) aged 16-49 years...
December 13, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29208334/factors-influencing-recurrent-emergency-department-visits-for-epistaxis-in-the-elderly
#8
Mohamad R Chaaban, Dong Zhang, Vicente Resto, James S Goodwin
OBJECTIVE: Our objective is to determine the risk factors associated with recurrent epistaxis requiring emergency department (ED) visits in the elderly. METHODS: We used a 5% national sample of Medicare data from January 2012 through December 2013. Our cohort included patients with a new diagnosis of epistaxis in the ED, defined as no epistaxis in the prior 12 months. We assessed the rates of ED visits for recurrent epistaxis in the 12 months following the incident visit...
December 2, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29200073/decreased-parasympathetic-activity-of-heart-rate-variability-during-anticipation-of-night-duty-in-anesthesiology-residents
#9
Man-Ling Wang, Pei-Lin Lin, Chi-Hsiang Huang, Hui-Hsun Huang
BACKGROUND: In residency programs, it is well known that autonomic regulation is influenced by night duty due to workload stress and sleep deprivation. A less investigated question is the impact on the autonomic nervous system of residents before or when anticipating a night duty shift. In this study, heart rate variability (HRV) was evaluated as a measure of autonomic nervous system regulation. METHODS: Eight residents in the Department of Anesthesiology were recruited, and 5 minutes of electrocardiography were recorded under 3 different conditions: (1) the morning of a regular work day (baseline); (2) the morning before a night duty shift (anticipating the night duty); and (3) the morning after a night duty shift...
November 30, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29198773/sex-and-age-dependent-differences-in-autonomic-nervous-system-functioning-in-adolescents
#10
Massimiliano de Zambotti, Harold Javitz, Peter L Franzen, Ty Brumback, Duncan B Clark, Ian M Colrain, Fiona C Baker
PURPOSE: We assessed sex- and age-dependent differences in a cross-sectional analysis of cardiac autonomic nervous system (ANS) regulation during sleep in adolescents. METHODS: Nocturnal heart rate (HR) and heart rate variability (HRV) metrics, reflecting ANS functioning, were analyzed across the night and within undisturbed rapid eye movement (REM) and non-REM sleep in 149 healthy adolescents (12-22 years; 67 female) from the National Consortium on Alcohol and Neurodevelopment in Adolescence...
December 1, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/29195726/cardiovascular-effects-of-oral-appliance-therapy-in-obstructive-sleep-apnea-a-systematic-review-and-meta-analysis
#11
REVIEW
Grietje E de Vries, Peter J Wijkstra, Ewout J Houwerzijl, Huib A M Kerstjens, Aarnoud Hoekema
Obstructive sleep apnea (OSA) is associated with increased cardiovascular morbidity and mortality. This study systematically reviews the effects of oral appliance therapy (OAT) on a broad spectrum of cardiovascular outcomes. A literature search was performed up to December 31st 2016. Twenty-five relevant full-text articles were retrieved. Sixteen articles were considered methodologically sufficient, including 11 randomized controlled trials. Pooled data of the RCTs showed significant reductions in daytime systolic and diastolic blood pressure compared to baseline, but no significant reductions in heart rate, except for daytime heart rate when compared to inactive/placebo OAT...
October 26, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/29184345/vagus-nerve-stimulation-modulates-complexity-of-heart-rate-variability-differently-during-sleep-and-wakefulness
#12
Karthi Balasubramanian, K Harikumar, Nithin Nagaraj, Sandipan Pati
Progressive loss of heart rate variability (HRV) and complexity are associated with increased risk of mortality in patients with cardiovascular disease and are a candidate marker for patients at risk of sudden cardiac death. HRV is influenced by the cardiac autonomic nervous system (ANS), although it is unclear which arm of the ANS (sympathetic or parasympathetic) needs to be perturbed to increase the complexity of HRV. In this case-control study, we have analyzed the relation between modulation of vagus nerve stimulation (VNS) and changes in complexity of HRV as a function of states of vigilance...
October 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/29167768/correlation-analysis-between-obstructive-sleep-apnea-syndrome-osas-and-heart-rate-variability
#13
Jiayong Xie, Wenjuan Yu, Zongren Wan, Fei Han, Qiaojun Wang, Rui Chen
Background: Heart rate variability (HRV) represents the sympathetic nervous system activity induced by apnea or hypopnea events among OSAS patients. However, few studies have been conducted to clarify the association between HRV parameters and polysomnography (PSG) diagnostic indices. In our study, we postulate that the prevalence of cardiac arrhythmias is associated with OSAS, and HRV parameters may be an effective method for OSAS screening. Methods: Overall, 168 participants had been collected from 2011 to 2016 in the Second Affiliated Hospital of Soochow University...
November 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/29167053/autonomic-nervous-system-function-activity-patterns-and-sleep-after-physical-or-cognitive-challenge-in-people-with-chronic-fatigue-syndrome
#14
Erin Cvejic, Carolina X Sandler, Andrew Keech, Benjamin K Barry, Andrew R Lloyd, Uté Vollmer-Conna
OBJECTIVE: To explore changes in autonomic functioning, sleep, and physical activity during a post-exertional symptom exacerbation induced by physical or cognitive challenge in participants with chronic fatigue syndrome (CFS). METHODS: Thirty-five participants with CFS reported fatigue levels 24-h before, immediately before, immediately after, and 24-h after the completion of previously characterised physical (stationary cycling) or cognitive (simulated driving) challenges...
December 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29157585/cardiac-autonomic-control-during-sleep-in-patients-with-myotonic-dystrophy-type-1-the-effects-of-comorbid-obstructive-sleep-apnea
#15
Eleonora Tobaldini, Giorgio Colombo, Monica Solbiati, Chiara Cogliati, Lucia Morandi, Alessandro Pincherle, Nicola Montano
OBJECTIVE: Myotonic dystrophy type 1 (DM1) is a hereditary myopathy characterized by an autosomal dominant inheritance with important cardiovascular and autonomic deregulation. DM1 patients have a high prevalence of obstructive sleep apnea (OSA), but the effects of this comorbidity on cardiovascular autonomic control (CAC) are unknown. The present study aimed to investigate CAC during sleep-wake cycle in DM1 patients, taking into account the effects of OSA comorbidity. METHOD: Twenty-three patients with a diagnosis of DM1, and a control group, underwent a complete polysomnographic study (PSG)...
November 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29100617/relationship-between-frequency-spectrum-of-heart-rate-variability-and-autonomic-nervous-activities-during-sleep-in-newborns
#16
Tsunenori Takatani, Yukihiro Takahashi, Ryota Yoshida, Ryuko Imai, Takao Uchiike, Masaharu Yamazaki, Midori Shima, Toshiya Nishikubo, Yoshito Ikada, Shinichi Fujimoto
INTRODUCTION: We analyzed the frequency spectrum of two neonatal sleep stages, namely active sleep and quiet sleep, and the relationship between these sleep stages and autonomic nervous activity in 74 newborns and 16 adults as a comparison. METHOD: Active and quiet sleep were differentiated by electroencephalogram (EEG) patterns, eye movements, and respiratory wave patterns; autonomic activity was analyzed using the RR interval of simultaneously recorded electrocardiogram (ECG) signals...
October 31, 2017: Brain & Development
https://www.readbyqxmd.com/read/29090400/no-effects-of-successful-bidirectional-smr-feedback-training-on-objective-and-subjective-sleep-in-healthy-subjects
#17
Olaf Binsch, Ellen S Wilschut, Martijn Arns, Charelle Bottenheft, Pierre J L Valk, Eric H G J M Vermetten
There is a growing interest in the application of psychophysiological signals in more applied settings. Unidirectional sensory motor rhythm-training (SMR) has demonstrated consistent effects on sleep. In this study the main aim was to analyze to what extent participants could gain voluntary control over sleep-related parameters and secondarily to assess possible influences of this training on sleep metrics. Bidirectional training of SMR as well as heart rate variability (HRV) was used to assess the feasibility of training these parameters as possible brain computer interfaces (BCI) signals, and assess effects normally associated with unidirectional SMR training such as the influence on objective and subjective sleep parameters...
October 31, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/29067142/intermittent-96-hour-auricular-electroacupuncture-for-hot-flashes-in-patients-with-prostate-cancer-a-pilot-study
#18
Tyvin Rich, Gerald W Porter, Luisel Ricks-Santi, Tzvi Milshtein, Thomas Corbin
Objective: The hot flash is a common vasomotor disorder that causes distress in menopausal women and that can be debilitating in men with prostate cancer who are treated with androgen deprivation therapy (ADT). The utility of auricular electroacupuncture (AEA) was tested exclusively for a small cohort of men with ADT-induced vasomotor symptoms while the men underwent a course of curative radiotherapy. Materials and Methods: Prior to and during radiotherapy treatment, men with vasomotor symptoms were given repeated questionnaires regarding severity and frequency of hot flashes, quality of life (QoL), and sleep over a 6-week span of an AEA protocol...
October 1, 2017: Medical Acupuncture
https://www.readbyqxmd.com/read/29064336/the-effect-of-dim-light-at-night-on-cerebral-hemodynamic-oscillations-during-sleep-a-near-infrared-spectroscopy-study
#19
Tae-Joon Kim, Byeong Uk Lee, Jun-Sang Sunwoo, Jung-Ick Byun, Jangsup Moon, Soon-Tae Lee, Keun-Hwa Jung, Kon Chu, Manho Kim, Jong-Min Lim, Eunil Lee, Sang Kun Lee, Ki-Young Jung
Recent studies have reported that dim light at night (dLAN) is associated with risks of cardiovascular complications, such as hypertension and carotid atherosclerosis; however, little is known about the underlying mechanism. Here, we evaluated the effect of dLAN on the cerebrovascular system by analyzing cerebral hemodynamic oscillations using near-infrared spectroscopy (NIRS). Fourteen healthy male subjects underwent polysomnography coupled with cerebral NIRS. The data collected during sleep with dim light (10 lux) were compared with those collected during sleep under the control dark conditions for the sleep structure, cerebral hemodynamic oscillations, heart rate variability (HRV), and their electroencephalographic (EEG) power spectrum...
October 24, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29060487/blood-pressure-and-cardiovascular-parameters-during-sleep-arousals
#20
Sobhan Salari Shahrbabaki, Beena Ahmed, Thomas Penzel, Dean Cvetkovic
Sleep arousal is generally known as a transient episode of wakefulness into the sleepiness. Sleep arousals can be classified based on their association and accompany with pathological episodes. In this paper, our objective was to find out whether various types of sleep arousals influence on blood pressure and Heart Rate Variability (HRV). We analysed continuous Diastolic and Systolic Blood Pressures (DBP and SBP), Pulse Transit Time (PTT) as well as High and Low Frequency components (HF and LF) of HRV in different types of arousals...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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