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https://www.readbyqxmd.com/read/28549245/analysis-of-heart-rate-variability-and-risk-factors-for-sudep-in-patients-with-drug-resistant-epilepsy
#1
Leyla Baysal-Kirac, Nail Güven Serbest, Erdi Şahin, Hava Özlem Dede, Candan Gürses, Ayşen Gökyiğit, Nerses Bebek, Ahmet Kaya Bilge, Betül Baykan
BACKGROUND: Cardiac problems have been suggested as causes of sudden unexpected death in epilepsy (SUDEP). Our aim was to investigate possible associations of cardiac autonomic functions based on heart rate variability (HRV) parameters with risk factors of SUDEP in patients with drug-resistant epilepsy. METHODS: Forty-seven patients with drug-resistant seizures and 45 healthy control subjects were enrolled in the study. Interictal time domain parameters of HRV were evaluated with 24-hour Holter recordings...
May 23, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28548688/effects-of-orthostatism-and-hemodialysis-on-mean-heart-period-and-fractal-heart-rate-properties-of-chronic-renal-failure-patients
#2
Juan C Echeverría, Oscar Infante, Héctor Pérez-Grovas, Hortensia González, Marco V José, Claudia Lerma
The aim of this work was to evaluate the short-term fractal index (α1 ) of heart rate variability (HRV) in chronic renal failure (CRF) patients by identifying the effects of orthostatism and hemodialysis (HD), and by evaluating the correlation between α1 and the mean RR interval from sinus beats (meanNN). HRV time series were derived from ECG data of 19 CRF patients and 20 age-matched healthy subjects obtained at supine and orthostatic positions (lasting 5 min each). Data from CRF patients were collected before and after HD...
May 26, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28548564/eating-habits-and-food-additive-intakes-are-associated-with-emotional-states-based-on-eeg-and-hrv-in-healthy-korean-children-and-adolescents
#3
Jin Young Kim, Hye Lim Kang, Dae-Keun Kim, Seung Wan Kang, Yoo Kyoung Park
PURPOSE: Recent study suggests that psychological issues and eating habits are closely related. In this study, we aimed to find the association between eating habits and intakes of artificial sweeteners with emotional states of schoolchildren using quantitatively analyzing objective biosignals. METHODS: The study was conducted at the National Standard Reference Data Center for Korean EEG as a cross-sectional study. Three hundred eighteen healthy children who have not been diagnosed with neurologic or psychiatric disorders were evaluated (168 girls and 150 boys; mean age of 11...
May 26, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28546681/heart-rate-variability-changes-during-and-after-the-practice-of-bhramari-pranayama
#4
L Nivethitha, N K Manjunath, A Mooventhan
BACKGROUND: Yoga is an ancient Indian science as well as the way of life. Pranayama is one of the most important yogic practices. Bhramari pranayama was shown to produce a reduction in blood pressure after the practice and thus reported to produce parasympathetic activity. However, there are no known studies reported the heart rate variability (HRV) changes either during or after the practice of Bhramari. Hence, this study aims at evaluating the HRV changes during and after the practice...
May 2017: International Journal of Yoga
https://www.readbyqxmd.com/read/28546285/anti-inflammatory-effects-and-mechanisms-of-vagal-nerve-stimulation-combined-with-electroacupuncture-in-a-rodent-model-of-tnbs-induced-colitis
#5
Haifeng Jin, Jie Guo, Jiemin Liu, Bin Lyu, Robert D Foreman, Jieyun Yin, Zhaohong Shi, Jiande Dz Chen
The purpose of this study was to determine effects and mechanisms of vagal nerve stimulation (VNS) and additive effects of electroacupuncture (EA) on colonic inflammation in a rodent model of IBD. Chronic inflammation in rats was induced by intrarectal TNBS (2,4,6-Trinitrobenzenesulfonic acid). The rats were then treated with sham-ES (electrical stimulation), VNS or VNS+EA for 3 weeks. Inflammatory responses were assessed by disease activity index (DAI), macroscopic scores and histological scores of colonic tissues, and plasma levels of TNF-α, IL-1β and IL-6, myeloperoxidase (MPO) activity of colonic tissues...
May 25, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28545810/thymic-stromal-lymphopoietin-and-apocynin-alter-the-expression-of-airway-remodeling-factors-in-human-rhinovirus-infected-cells
#6
Joanna Wieczfinska, Rafal Pawliczak
Airway remodeling is a characteristic of bronchial asthma. The process involves the expression of many genes, such as transforming growth factor-beta (TGF-β), tissue inhibitors of metalloproteinases (TIMP-1), MMP and arginase. Human rhinovirus (HRV) is known to cause asthma exacerbations, and viral infections might be involved in the development of airway remodeling. Therefore, the aim of this study was to determine the influence of HRV on the genes involved in airway remodeling and to examine the impact of thymic stromal lymphopoietin (TSLP) and contribution of oxidative stress on airway remodeling in the context of HRV infection...
May 16, 2017: Immunobiology
https://www.readbyqxmd.com/read/28545487/inhaled-ambient-level-traffic-derived-particulates-decrease-cardiac-vagal-influence-and-baroreflexes-and-increase-arrhythmia-in-a-rat-model-of-metabolic-syndrome
#7
Alex P Carll, Samir M Crespo, Mauricio S Filho, Douglas H Zati, Brent A Coull, Edgar A Diaz, Rodrigo D Raimundo, Thomas N G Jaeger, Ana Laura Ricci-Vitor, Vasileios Papapostolou, Joy E Lawrence, David M Garner, Brigham S Perry, Jack R Harkema, John J Godleski
BACKGROUND: Epidemiological studies have linked exposures to ambient fine particulate matter (PM2.5) and traffic with autonomic nervous system imbalance (ANS) and cardiac pathophysiology, especially in individuals with preexisting disease. It is unclear whether metabolic syndrome (MetS) increases susceptibility to the effects of PM2.5. We hypothesized that exposure to traffic-derived primary and secondary organic aerosols (P + SOA) at ambient levels would cause autonomic and cardiovascular dysfunction in rats exhibiting features of MetS...
May 25, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28544507/the-effect-of-binaural-beat-technology-on-the-cardiovascular-stress-response-in-military-service-members-with-postdeployment-stress
#8
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...
May 23, 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28538325/heart-rate-variability-discriminates-competitive-levels-in-professional-soccer-players
#9
Riccardo Proietti, Selenia di Fronso, Lucas A Pereira, Laura Bortoli, Claudio Robazza, Fabio Y Nakamura, Maurizio Bertollo
Proietti, R, di Fronso, S, Pereira, LA, Bortoli, L, Robazza, C, Nakamura, FY, and Bertollo, M. Heart rate variability discriminates competitive levels in professional soccer players. J Strength Cond Res 31(6): 1719-1725, 2017-Heart rate variability (HRV) has been increasingly used to monitor team sports athletes. Besides the traditional time domain indices (i.e., the SD of successive RR intervals [SDNN] and the root mean square difference of successive normal RR intervals [RMSSD]), recently the use of the stress score (SS), which is an inverse function of the SD2 index derived from the Poincaré plot, and the sympathetic/parasympathetic ratio (S/PS) to monitor soccer players has been proposed...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538315/evaluation-of-the-effectiveness-of-compression-garments-on-autonomic-nervous-system-recovery-after-exercise
#10
Alessandro Piras, Giorgio Gatta
Piras, A and Gatta, G. Evaluation of the effectiveness of compression garments on autonomic nervous system recovery after exercise. J Strength Cond Res 31(6): 1636-1643, 2017-The aim of this investigation was to evaluate the recovery pattern of a whole-body compression garment on hemodynamic parameters and on autonomic nervous system (ANS) activity after a swimming performance. Ten young male athletes were recruited and tested in 2 different days, with and without wearing the garment during the recovery phase...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28536533/heart-rate-fragmentation-a-new-approach-to-the-analysis-of-cardiac-interbeat-interval-dynamics
#11
Madalena D Costa, Roger B Davis, Ary L Goldberger
Background: Short-term heart rate variability (HRV) is most commonly attributed to physiologic vagal tone modulation. However, with aging and cardiovascular disease, the emergence of high short-term HRV, consistent with the breakdown of the neuroautonomic-electrophysiologic control system, may confound traditional HRV analysis. An apparent dynamical signature of such anomalous short-term HRV is frequent changes in heart rate acceleration sign, defined here as heart rate fragmentation. Objective: The aims were to: (1) introduce a set of metrics designed to probe the degree of sinus rhythm fragmentation; (2) test the hypothesis that the degree of fragmentation of heartbeat time series increases with the participants' age in a group of healthy subjects; (3) test the hypothesis that the heartbeat time series from patients with advanced coronary artery disease (CAD) are more fragmented than those from healthy subjects; and (4) compare the performance of the new fragmentation metrics with standard time and frequency domain measures of short-term HRV...
2017: Frontiers in Physiology
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
#12
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
#13
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/28533100/effects-of-remote-ischaemic-conditioning-on-heart-rate-variability-and-cardiac-function-in-patients-with-mild-ischaemic-heart-failure
#14
Long Chen, Qianxing Zhou, Hong Jin, Kongbo Zhu, Hong Zhi, Zhongpu Chen, Genshan Ma
BACKGROUND: Cardioprotective effects of remote ischaemic conditioning (RIC) in the setting of ischaemic heart disease have been shown recently. But the effects of RIC on heart rate variability (HRV) and cardiac function in patients with stable ischaemic heart failure (IHF) are still unknown. METHODS: Fifty patients with stable IHF were enrolled and randomly divided into RIC group and control group. Remote ischaemic conditioning treatment was performed twice a day for six weeks...
May 3, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28532415/hemodynamic-changes-caused-by-acupuncture-in-healthy-volunteers-a-prospective-single-arm-exploratory-clinical-study
#15
Tae-Hun Kim, Boncho Ku, Jang-Han Bae, Jae-Young Shin, Min-Ho Jun, Jung Won Kang, Junghwan Kim, Jun-Hwan Lee, Jaeuk U Kim
BACKGROUND: Radial pressure pulse wave (RPPW) examination has been a key diagnostic component of traditional Chinese medicine. The objective of this study was to investigate the changes in RPPW along with various hemodynamic variables after acupuncture stimulation and to examine the validity of pulse diagnosis as a modern diagnostic tool. METHODS: We conducted acupuncture stimulation at both ST36 acupuncture points in 25 healthy volunteers. We simultaneously assessed the RPPW by pulse tonometry; heart rate variability (HRV) by electrocardiogram; photoplethysmogram (PPG) signals, respiration rate, peripheral blood flow velocity and arterial depth by ultrasonography; and cardiac output by impedance cardiography, before, during and after a session of acupuncture stimulation...
May 22, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28528275/it-is-not-all-bad-for-the-grey-city-a-crossover-study-on-physiological-and-psychological-restoration-in-a-forest-and-an-urban-environment
#16
Ulrika K Stigsdotter, Sus Sola Corazon, Ulrik Sidenius, Jesper Kristiansen, Patrik Grahn
Today, urbanization presents a challenge to urban planning with regard to creating healthy living environments. The aim of this research is to gain further knowledge of the restorativeness of a best case urban and natural environment: that is a historic down town urban environment and forest environment located in an arboretum. The study has a cross-over design where 51 (N) female university students are exposed to the two environments through both seated viewing and walking. A mixed method approach is used with both physiological measurements of blood pressure (BP) and heart rate variability (HRV) and psychological measurements of mood change and perceived restorativeness...
May 18, 2017: Health & Place
https://www.readbyqxmd.com/read/28528244/heart-rate-variability-of-chronic-posttraumatic-stress-disorder-in-the-korean-veterans
#17
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/28527351/permutation-entropy-analysis-of-heart-rate-variability-for-the-assessment-of-cardiovascular-autonomic-neuropathy-in-type-1-diabetes-mellitus
#18
Claudia Carricarte Naranjo, Lazaro M Sanchez-Rodriguez, Marta Brown Martínez, Mario Estévez Báez, Andrés Machado García
Heart rate variability (HRV) analysis is a relevant tool for the diagnosis of cardiovascular autonomic neuropathy (CAN). To our knowledge, no previous investigation on CAN has assessed the complexity of HRV from an ordinal perspective. Therefore, the aim of this work is to explore the potential of permutation entropy (PE) analysis of HRV complexity for the assessment of CAN. For this purpose, we performed a short-term PE analysis of HRV in healthy subjects and type 1 diabetes mellitus patients, including patients with CAN...
May 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28527019/autonomic-arousal-in-anxious-and-typically-developing-youth-during-a-stressor-involving-error-feedback
#19
Michelle Rozenman, Alexandra Sturm, James T McCracken, John Piacentini
Anxiety has been proposed to influence psychophysiological reactivity in children and adolescents. However, the extant empirical literature has not always found physiological reactivity to be associated with anxiety in youth. Further, most investigations have not examined psychophysiological reactivity in real time over the course of acute stress. To test the impact of anxiety disorder status on autonomic arousal in youth, we compared youth with primary anxiety disorders (N = 24) to typically developing (TD) youth (N = 22) on heart rate (HR), heart rate variability (HRV), and respiratory sinus arrhythmia (RSA) during an acute stressor in which youth received error-related feedback...
May 19, 2017: European Child & Adolescent Psychiatry
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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