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heart rate variability and sleep

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https://www.readbyqxmd.com/read/28937235/heart-rate-variability-in-newborns
#1
K Javorka, Z Lehotska, M Kozar, Z Uhrikova, B Kolarovszki, M Javorka, M Zibolen
Heart rate (HR) and heart rate variability (HRV) in newborns is influenced by genetic determinants, gestational and postnatal age, and other variables. Premature infants have a reduced HRV. In neonatal HRV evaluated by spectral analysis, a dominant activity can be found in low frequency (LF) band (combined parasympathetic and sympathetic component). During the first postnatal days the activity in the high frequency (HF) band (parasympathetic component) rises, together with an increase in LF band and total HRV...
September 22, 2017: Physiological Research
https://www.readbyqxmd.com/read/28928228/salivary-%C3%AE-amylase-in-on-call-from-home-fire-and-emergency-service-personnel
#2
Sarah Janet Hall, Brad Aisbett, Sam J Robertson, Sally A Ferguson, Anne Turner
The effect of working on-call from home on sympatho-adrenal medullary (SAM) system activity is currently unknown. This study had two aims, Aim 1: examine salivary α-amylase awakening response (AAR) and diurnal salivary α-amylase (sAA) profile in fire and emergency service workers who operate on-call from home following a night on-call with a call (NIGHT-CALL), a night on-call without a call (NO-CALL) and an off-call night (OFF-CALL) and, Aim 2: explore whether there was an anticipatory effect of working on-call from home (ON) compared to when off-call (OFF) on the diurnal sAA profile...
September 19, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28899529/qt-interval-variability-index-and-qt-interval-duration-during-different-sleep-stages-in-patients-with-obstructive-sleep-apnea
#3
Moonika Viigimae, Deniss Karai, Kristjan Pilt, Peeter Pirn, Heini Huhtala, Olli Polo, Kalju Meigas, Jyri Kaik
OBJECTIVES: The aim of the study was to investigate the impact of obstructive sleep apnea (OSA) on the QT interval variability and duration in patients during different sleep stages. METHODS: Polysomnographic recordings of 28 (13 male, 15 female) patients with OSA and 30 (15 male, 15 female) patients without OSA were analyzed. The QT interval variability index (QTVI) and the corrected QT interval (QTc) analyses were performed using two awake, 3-4 non-rapid eye movement (NREM) and three rapid eye movement (REM) sleep episodes (each 300 s)...
September 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28875137/risk-factor-analysis-of-additional-administration-of-sedative-agent-and-patient-dissatisfaction-in-intravenous-conscious-sedation-using-midazolam-for-third-molar-extraction
#4
Dong-Whan Shin, Jin-Yong Cho, Yoon-Sic Han, Hye-Young Sim, Hee-Sun Kim, Da-Un Jung, Ho Lee
OBJECTIVES: The primary purpose of this study was to investigate the factors related with additional administration of sedative agent during intravenous conscious sedation (IVS) using midazolam (MDZ). The secondary purpose was to analyze the factors affecting patient satisfaction. MATERIALS AND METHODS: Clinical data for 124 patients who had undergone surgical extraction of mandibular third molar under IVS using MDZ were retrospectively investigated in this case-control study...
August 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28864708/does-supplementation-with-carnosine-improve-cardiometabolic-health-and-cognitive-function-in-patients-with-pre-diabetes-and-type-2-diabetes-study-protocol-for-a-randomised-double-blind-placebo-controlled-trial
#5
Estifanos Baye, Kirthi Menon, Maximilian Pj de Courten, Arul Earnest, James Cameron, Barbora de Courten
INTRODUCTION: Carnosine, an over-the-counter food supplement, has a promising potential for the prevention and treatment of chronic diseases such as type 2 diabetes (T2DM), cardiovascular and neurodegenerative diseases through its anti-inflammatory, antiglycation, antioxidative and chelating effects. We have previously shown that supplementation with carnosine preserves insulin sensitivity and secretion in non-diabetic overweight and obese individuals. The effect of carnosine on cardiometabolic risk and related cognitive outcomes in patients with pre-diabetes and T2DM has thus far not been studied...
September 1, 2017: BMJ Open
https://www.readbyqxmd.com/read/28862738/doppler-based-fetal-heart-rate-analysis-markers-for-the-detection-of-early-intrauterine-growth-restriction
#6
Lisa Stroux, Christopher W Redman, Antoniya Georgieva, Stephen J Payne, Gari D Clifford
INTRODUCTION: One indicator for fetal risk of mortality is intra-uterine growth restriction (IUGR). Whether markers reflecting the impact of growth restriction on the cardiovascular system, computed from a Doppler-derived heart rate signal, would be suitable in its detection antenatally were studied MATERIAL AND METHODS: We used a cardiotocography archive of 1163 IUGR cases and 1163 healthy controls, matched for gestation and gender. We assessed the discriminative power of short-term variability (STV) and long-term variability (LTV) of the fetal heart rate, computed over episodes of high and low variation aiming to separate growth-restricted fetuses from controls...
September 1, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28860606/effect-of-cortisol-diurnal-rhythm-on-emotional-memory-in-healthy-young-adults
#7
Mitsue Nagamine, Hiroko Noguchi, Nobuaki Takahashi, Yoshiharu Kim, Yutaka Matsuoka
Few studies have investigated the relationship between cortisol diurnal rhythm and cognitive function in healthy young adults, especially for emotional memory. To address this deficiency, this study examined the effect of diurnal cortisol slope (DCS) and heart rate variability (HRV) on emotional memory. Participants included healthy volunteers (44 men and 23 women; mean age 20.60 yrs). Participants were shown emotionally arousing slides and were asked to return to the laboratory one week later where they were given a "surprise" memory test to examine their emotional memory retention...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28856443/circadian-rhythm-of-blood-cardiac-troponin-t-concentration
#8
Stephane Fournier, Lea Iten, Pedro Marques-Vidal, Olivier Boulat, Daniel Bardy, Ahmed Beggah, Rachel Calderara, Beata Morawiec, Nathalie Lauriers, Pierre Monney, Juan F Iglesias, Patrizio Pascale, Brahim Harbaoui, Eric Eeckhout, Olivier Muller
INTRODUCTION: High-sensitivity cardiac troponin assays have significantly improved the sensitivity of myocardial infarction detection by using cutoff values and early absolute changes. However, variation in repeated measures also depends on biological variability. This study aimed to assess the potential circadian component of this biological variability. METHODS: 17 healthy volunteers were recruited, and standardized conditions for physical activity, meals, exposure to light and duration of sleep were imposed...
August 30, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28846150/venipuncture-procedure-affects-heart-rate-variability-and-chronotropic-response
#9
Brian Kliszczewicz, Michael R Esco, Emily Bechke, Yuri Feito, Cassie Williamson, Danielle Brown, Brandi Price
BACKGROUND: Heart Rate Variability (HRV) has been shown to be influenced by several factors such as noise, sleep status, light, and emotional arousal; however, little evidence is available concerning autonomic responses to a venipuncture. The purpose of this study was to investigate changes of HRV indexes and heart rate (HR) during, and following a venipuncture procedure among healthy individuals. METHODS: 33 healthy individuals (22.8 ± 0.56 yrs, 167 ± 1.56 cm, 69...
August 28, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28845178/transdermal-nicotine-patch-effects-on-eeg-power-spectra-and-heart-rate-variability-during-sleep-of-healthy-male-adults
#10
Jong-Bae Choi, Yu-Jin G Lee, Do-Un Jeong
OBJECTIVE: The effect of transdermal nicotine patch on sleep physiology is not well established. The current study aimed to examine the influence of nicotine patch on homeostatic sleep propensity and autonomic nervous system. METHODS: We studied 16 non-smoking young healthy volunteers with nocturnal polysomnography in a double blind crossover design between sleep with and without nicotine patch. We compared the sleep variables, sleep EEG power spectra, and heart rate variability...
July 2017: Psychiatry Investigation
https://www.readbyqxmd.com/read/28841459/performance-comparison-between-wrist-and-chest-actigraphy-in-combination-with-heart-rate-variability-for-sleep-classification
#11
Md Aktaruzzaman, Massimo Walter Rivolta, Ruby Karmacharya, Nello Scarabottolo, Luigi Pugnetti, Massimo Garegnani, Gabriele Bovi, Giovanni Scalera, Maurizio Ferrarin, Roberto Sassi
The concurrent usage of actigraphy and heart rate variability (HRV) for sleep efficiency quantification is still matter of investigation. This study compared chest (CACT) and wrist (WACT) actigraphy (actigraphs positioned on chest and wrist, respectively) in combination with HRV for automatic sleep vs wake classification. Accelerometer and ECG signals were collected during polysomnographic studies (PSGs) including 18 individuals (25-53 years old) with no previous history of sleep disorders. Then, an experienced neurologist performed sleep staging on PSG data...
August 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28840546/obstructive-sleep-apnea-does-not-impair-cardiorespiratory-responses-to-progressive-exercise-performed-until-exhaustion-in-hypertensive-elderly
#12
Bruno Teixeira Barbosa, Amilton da Cruz Santos, Murillo Frazão, Tulio Rocha Petrucci, Gabriel Grizzo Cucato, Adriana Oliveira Sarmento, Eduardo D S Freitas, Anna Myrna Jaguaribe de Lima, Maria do Socorro Brasileiro-Santos
BACKGROUND: Elderly people have a high prevalence to systemic arterial hypertension (SAH) and obstructive sleep apnea (OSA). Both comorbidities are closely associated and inflict damage on cardiorespiratory capacity. METHODS: In order to assess cardiorespiratory responses to the cardiopulmonary exercise test (CPET) among hypertensive elderly with OSA, we enrolled 28 subjects into two different groups: without OSA (No-OSA: apnea/hypopnea index (AHI) < 5 events/h; n = 15) and with OSA (OSA: AHI ≥ 15 events/h; n = 13)...
August 24, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28838130/validation-of-photoplethysmography-based-sleep-staging-compared-with-polysomnography-in-healthy-middle-aged-adults
#13
Pedro Fonseca, Tim Weysen, Maaike S Goelema, Els I S Møst, Mustafa Radha, Charlotte Lunsingh Scheurleer, Leonie van den Heuvel, Ronald M Aarts
Study Objectives: To compare the accuracy of automatic sleep staging based on heart rate variability measured from photoplethysmography (PPG) combined with body movements measured with an accelerometer, with polysomnography (PSG) and actigraphy. Methods: Using wrist-worn PPG to analyze heart rate variability and an accelerometer to measure body movements, sleep stages and sleep statistics were automatically computed from overnight recordings. Sleep-wake, 4-class (wake/N1 + N2/N3/REM) and 3-class (wake/NREM/REM) classifiers were trained on 135 simultaneously recorded PSG and PPG recordings of 101 healthy participants and validated on 80 recordings of 51 healthy middle-aged adults...
July 1, 2017: Sleep
https://www.readbyqxmd.com/read/28814378/mhealth-technologies-for-palliative-care-patients-at-the-interface-of-in-patient-to-outpatient-care-protocol-of-feasibility-study-aiming-to-early-predict-deterioration-of-patient-s-health-status
#14
Gudrun Theile, Vanessa Klaas, Gerhard Tröster, Matthias Guckenberger
BACKGROUND: Palliative care patients are a particularly vulnerable population and one of the critical phases in patients' trajectories is discharge from specialized in-patient palliative care into outpatient care, where availability of a palliative care infrastructure is highly variable. A relevant number of potentially avoidable readmissions and emergency visits of palliative patients is observed due to rapid exacerbation of symptoms indicating the need for a closer patient monitoring...
August 16, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28812280/effect-of-missing-inter-beat-interval-data-on-heart-rate-variability-analysis-using-wrist-worn-wearables
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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