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Low frequency hrv

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https://www.readbyqxmd.com/read/27912162/serotonin-2a-receptor-5-ht2a-gene-promoter-variant-interacts-with-chronic-perceived-stress-to-modulate-resting-parasympathetic-activity-in-humans
#1
Chuan-Chia Chang, Wen-Hui Fang, Hsin-An Chang, Tieh-Ching Chang, Jia-Fwa Shyu, San-Yuan Huang
Decreased resting vagal (parasympathetic) tone is implicated in the development of stress-related disorders, including anxiety and depression. Chronic stress elevates the expression of serotonin 2A receptors (5-HT2A), while activation of 5-HT2A leads to inhibition of parasympathetic synaptic transmission. The T allele of the promoter variant, rs6311 (C>T), of the 5-HT2A gene has been shown to increase the 5-HT2A expression in vitro and to be associated with anxiety and depressive disorders. We thus hypothesized that the 5-HT2A functional polymorphism may influence resting vagal activity among persons with chronically high levels of perceived stress...
November 16, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27910248/use-of-heart-rate-variability-and-photoplethysmograph-derived-parameters-as-assessment-signals-of-radiofrequency-therapy-efficacy-for-chronic-pain
#2
Jing-Jhao Ye, Chiung-Cheng Chuang, Yu-Ting Tai, Kuan-Ting Lee, Kuo-Sheng Hung
BACKGROUND: Radiofrequency therapy (RFT) generates molecular motion, and produces heat and electromagnetic effects on tissues, which attenuate pain sensation and thereby relieve pain. This study was to observe the altering trend of physiological parameters after RFT for chronic cervical or lumbar pain. METHODS: This study recruited 66 patients with chronic cervical or lumbar pain, and recorded their physiological parameters before and after RFT by using heart rate variability (HRV) and photoplethysmography (PPG) to explore the feasibility of RFT efficacy assessment...
December 2, 2016: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/27901339/cardiac-parasympathetic-reactivation-after-small-sided-soccer-games-and-repeated-sprints-in-untrained-healthy-adolescents
#3
Amri Hammami, Sofien Kasmi, Narimen Yousfi, Marwa Bouamra, Zouhaier Tabka, Ezdine Bouhlel
BACKGROUND: It has been shown that recreational soccer was a highly motivating and social activity which produces large improvements in health-related indices in sedentary healthy and unhealthy subjects. The purpose of this study was to compare the acute parasympathetic reactivation after small-sided soccer games (SSG) and repeated sprints training (RST) sessions. METHODS: Eight post-pubertal untrained adolescents (age 15.8 ± 0.6 years, body mass 59.1 ± 3.7 kg, height 1...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27892761/autonomic-markers-associated-with-generalized-social-phobia-symptoms-heart-rate-variability-and-salivary-alpha-amylase
#4
María J García-Rubio, Laura Espín, Vanesa Hidalgo, Alicia Salvador, Jesús Gómez-Amor
The study of autonomic nervous system changes associated with generalized social phobia (GSP) disorder has increased in recent years, showing contradictory results. The present study aimed to evaluate how young people with GSP reacted before, during, and after exposure to the Trier Stress Social Test (TSST), focusing on their autonomic changes (heart rate variability, HRV, and salivary alpha-amylase, sAA) compared to a control group (non-GSP). Some psychological variables were also considered. Sex was specifically studied as a possible modulator of autonomic fluctuations and psychological state...
November 28, 2016: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/27889892/effects-of-mental-stress-induction-on-heart-rate-variability-in-patients-with-panic-disorder
#5
Katja Petrowski, Susann Wichmann, Timo Siepmann, Stefan R Bornstein, Martin Siepmann
Reduced heart rate variability (HRV) constitutes a widely used marker of cardiac autonomic inflexibility which has been linked to disorders such as panic disorder (PD). To date, the pathophysiological mechanisms whereby panic leads to attenuated HRV are not fully elucidated. We aimed to investigate the hypothesis that PD patients show pathological reactivity both in response to interoceptive and psychosocial stress in comparison to healthy individuals. We performed a controlled study on 38 patients diagnosed with PD [20 males and 18 females aged 35...
November 26, 2016: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/27875704/evaluation-of-stress-response-during-mesiodens-extraction-under-general-anesthesia-using-heart-rate-variability
#6
Hye-Won Hwang, Hong-Keun Hyun, Young-Jae Kim, Jung-Wook Kim, Teo Jeon Shin
PURPOSE: Stress related to dental treatment can be associated with negative outcomes. Heart rate variability (HRV) is an objective measurement of autonomic nervous system activity. Therefore, HRV was used to identify autonomic nervous system reactions during mesiodens extraction under general anesthesia in children. MATERIALS AND METHODS: Electrocardiography was performed with customized software during treatment. HRV parameters were analyzed according to time and frequency domains during each dental procedure (local anesthesia, incision, flap, bone removal, extraction of mesiodens, and suturing)...
October 28, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27871552/preoperative-depressed-mood-and-perioperative-heart-rate-variability-in-patients-with-hepatic-cancer
#7
Eun-Hee Kim, Jin-Hyoung Park, Sangmin M Lee, Mi-Sook Gwak, Gaab-Soo Kim, Myung-Hee Kim
STUDY OBJECTIVE: How perioperative heart rate variability (HRV) indices differ according to the anxiety or depressed mood of patients scheduled to undergo a major surgical procedure for cancer. DESIGN: Prospective observational study. SETTING: Operating room. PATIENTS: Forty-one male patients between 40 and 70 years of age with hepatocellular carcinoma were included in the final analysis. INTERVENTIONS: HRV was measured on the day before surgery (T1), impending anesthesia (T2), and after anesthetic induction (T3)...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27867364/an-objective-screening-method-for-major-depressive-disorder-using-logistic-regression-analysis-of-heart-rate-variability-data-obtained-in-a-mental-task-paradigm
#8
Guanghao Sun, Toshikazu Shinba, Tetsuo Kirimoto, Takemi Matsui
BACKGROUND AND OBJECTIVES: Heart rate variability (HRV) has been intensively studied as a promising biological marker of major depressive disorder (MDD). Our previous study confirmed that autonomic activity and reactivity in depression revealed by HRV during rest and mental task (MT) conditions can be used as diagnostic measures and in clinical evaluation. In this study, logistic regression analysis (LRA) was utilized for the classification and prediction of MDD based on HRV data obtained in an MT paradigm...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27861527/the-impact-of-early-life-stress-on-growth-and-cardiovascular-risk-a-possible-example-for-autonomic-imprinting
#9
Reiner Buchhorn, Sebastian Meint, Christian Willaschek
INTRODUCTION: Early life stress is imprinting regulatory properties with life-long consequences. We investigated heart rate variability in a group of small children with height below the third percentile, who experienced an episode of early life stress due to heart failure or intra uterine growth retardation. These children appear to develop autonomic dysfunction in later life. RESULTS: Compared to the healthy control group heart rate variability (HRV) is reduced on average in a group of 101 children with short stature...
2016: PloS One
https://www.readbyqxmd.com/read/27858873/dexrazoxane-improves-cardiac-autonomic-function-in-epirubicin-treated-breast-cancer-patients-with-type-2-diabetes
#10
Fangyi Sun, Jing Shi, Cuizhi Geng
OBJECTIVE: The study objective was to investigate the protective effects of dexrazoxane (DRZ) on the cardiac autonomic nervous system (ANS) activity in anthracycline-treated breast cancer patients with diabetes. METHODS: A total of 110 early stage breast cancer patients with type 2 diabetes were divided randomly into 2 even groups: chemotherapy alone (Chemo) and chemotherapy + DRZ (Chemo + DRZ). All patients underwent adjuvant chemotherapy (80 mg/m epirubicin and 500 mg/m cyclophosphamide) for a total of 6 cycles with 21 days/cycle...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27856807/paradoxical-dissociation-between-heart-rate-and-heart-rate-variability-following-different-modalities-of-exercise-in-individuals-with-metabolic-syndrome-the-resolve-study
#11
Gil Boudet, Guillaume Walther, Daniel Courteix, Philippe Obert, Bruno Lesourd, Bruno Pereira, Robert Chapier, Agnès Vinet, Alain Chamoux, Geraldine Naughton, Paul Poirier, Frédéric Dutheil
AIMS: To analyse the effects of different modalities of exercise training on heart rate variability (HRV) in individuals with metabolic syndrome (MetS). METHODS AND RESULTS: Eighty MetS participants (aged 50-70 years) were housed and managed in an inpatient medical centre for 21 days, including weekends. Physical activity and food intake/diet were intensively monitored. Participants were randomly assigned into three training groups, differing only by intensity of exercise: moderate-endurance-moderate-resistance (re), high-resistance-moderate-endurance (Re), and moderate-resistance-high-endurance (rE)...
November 17, 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27855152/heart-rate-variability-in-hypoxic-ischemic-encephalopathy-during-therapeutic-hypothermia
#12
Robert M Goulding, Nathan J Stevenson, Deirdre M Murray, Vicki Livingstone, Peter M Filan, Geraldine B Boylan
BACKGROUND: Therapeutic hypothermia (TH) aims to ameliorate further injury in infants with moderate and severe hypoxic ischemic encephalopathy (HIE). We aim to assess the effect of TH on heart rate variability (HRV) in infants with HIE. METHODS: Multi-channel video-electroencephalography (EEG) and electrocardiography were assessed at 6-72h after birth in full-term infants with HIE, recruited prior to (pre-TH group) and following (TH group) the introduction of TH in our neonatal unit...
November 17, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27849189/sleep-related-bradyarrhythmic-events-and-heart-rate-variability-in-apparently-healthy-individuals
#13
Tolga Çimen, Hamza Sunman, Mehmet Erat, Tolga Han Efe, Ahmet Akyel, Murat Bilgin, Sadık Açıkel, Mehmet Doğan, Ekrem Yeter
OBJECTIVE: It is thought that abnormal cardiac impulses of the autonomic nervous system during sleep are responsible for sleep-related bradyarrhythmias. Despite a proposed common etiopathogenesis and having common name of "sleep-related bradyarrhythmias," precise importance of sinoatrial or atrioventricular (AV) node involvement remains elusive. This study aimed to determine whether there is a difference in sleeprelated bradyarrhythmias from the point of view of heart rate variability (HRV)...
November 10, 2016: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/27843840/blood-pressure-reduction-following-accumulated-physical-activity-in-prehypertensive
#14
Yogesh Saxena, Rani Gupta, Arsalan Moinuddin, Ravinder Narwal
CONTEXT: Accumulated moderate physical activity (PA) for 30 min in a day is the only recommended treatment of prehypertension. OBJECTIVE: We investigated autonomic modulation as a possible mechanism for the decrease in blood pressure (BP) during the rest periods in each 10 min session of PA. DESIGN SETTING AND PARTICIPANTS: We conducted a single-blind randomized multi-arm control trial on 40 prehypertensive (pre-HT) young male adults. METHODS: Participants were randomly divided by using random number table into four groups...
April 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/27831921/the-effects-of-smoking-and-nicotine-ingestion-on-exercise-heat-tolerance
#15
Amit Druayn, Danit Atias, Itay Ketko, Yoav Cohen-Sivan, Yuval Heled
BACKGROUND: Smoking has a thermogenic effect and is associated with low physical performance. Nevertheless, a direct, quantitative effect of acute smoking on exercise heat tolerance has not been reported. METHODS: Sixteen healthy young male volunteers, eight cigarette smokers, and eight non-smokers participated in the study. All subjects performed a maximal oxygen consumption test (VO2max) and a standardized heat tolerance test (HTT) after at least 12 h without smoking under the following conditions: no nicotine exposure, 10 min after nicotine exposure (2 mg nicotine lozenge), and 10 min after smoking two cigarettes (0...
November 10, 2016: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/27831751/altered-autonomic-functions-and-distressed-personality-traits-in-male-adolescents-with-internet-gaming-addiction
#16
Nahyun Kim, Tonda L Hughes, Chang G Park, Laurie Quinn, In Deok Kong
Internet gaming addiction (IGA) has been associated with many negative health outcomes, especially for youth; however, few studies have examined the physiological parameters and personality features related to this addiction. This study aimed to identify differences in autonomic functions and distressed (type D) personality traits among Korean adolescent males with and without IGA. In a cross-sectional study, 68 adolescent males were recruited in a Korean city using convenience and snowball sampling methods...
November 2016: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/27829967/does-virtual-reality-based-kinect-dance-training-paradigm-improve-autonomic-nervous-system-modulation-in-individuals-with-chronic-stroke
#17
Luciana Maria Malosá Sampaio, Savitha Subramaniam, Ross Arena, Tanvi Bhatt
BACKGROUND: Physical inactivity and low resting heart rate variability (HRV) are associated with an increased cardiovascular deconditioning, risk of secondary stroke and mortality. Aerobic dance is a multidimensional physical activity and recent research supports its application as a valid alternative cardiovascular training. Furthermore, technological advances have facilitated the emergence of new approaches for exercise training holding promise, especially those methods that integrate rehabilitation with virtual gaming...
October 2016: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/27809785/association-between-autonomic-nervous-dysfunction-and-cellular-inflammation-in-end-stage-renal-disease
#18
Eric Seibert, Kristina Zohles, Christof Ulrich, Alexander Kluttig, Sebastian Nuding, Jan A Kors, Cees A Swenne, Karl Werdan, Roman Fiedler, Matthias Girndt
BACKGROUND: Alterations in autonomic nervous function are common in hemodialysis (HD) patients. Sympathetic as well as parasympathetic activation may be associated with immune and inflammatory responses. We intended to confirm a role of autonomous dysregulation for inflammation in HD patients. METHODS: 30 HD patients (including 15 diabetics) and 15 healthy controls were studied for heart rate variability (HRV) using 5 min ECG recordings. Heart rate variability was estimated by time-domain parameters (the standard deviation of the RR intervals (SDNN) and the percentage of pairs of adjacent RR intervals differing by >50 ms (pNN50)) and frequency-domain-analysis (high- and low-frequency variation of RR intervals, HF and LF)...
November 3, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27797930/effects-of-liraglutide-on-heart-rate-and-heart-rate-variability-a-randomized-double-blind-placebo-controlled-crossover-study
#19
Preman Kumarathurai, Christian Anholm, Bjørn S Larsen, Rasmus Huan Olsen, Sten Madsbad, Ole Kristiansen, Olav W Nielsen, Steen B Haugaard, Ahmad Sajadieh
OBJECTIVE: Reduced heart rate variability (HRV) and increased heart rate (HR) have been associated with cardiovascular mortality. Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) increase HR, and studies have suggested that they may reduce HRV. We examined the effect of the GLP-1 RA liraglutide on HRV and diurnal variation of HR in overweight patients with newly diagnosed type 2 diabetes (T2D) and stable coronary artery disease (CAD). RESEARCH DESIGN AND METHODS: Liraglutide or placebo was administrated to a backbone therapy of metformin in this double-blind, placebo-controlled 12 + 12-week crossover study...
October 19, 2016: Diabetes Care
https://www.readbyqxmd.com/read/27765048/correlation-between-health-related-quality-of-life-in-the-physical-domain-and-heart-rate-variability-in-asymptomatic-adults
#20
Wan-Chun Lu, Nian-Sheng Tzeng, Yu-Chen Kao, Chin-Bin Yeh, Terry B J Kuo, Chuan-Chia Chang, Hsin-An Chang
BACKGROUND: Reduced health-related quality of life in the physical domain (HRQOLphysical) has been reported to increase risks for cardiovascular disease (CVD); however, the mechanism underlying this phenomenon is still unclear. The autonomic nervous system (ANS) that connects the body and mind is a biologically plausible candidate to investigate this mechanism. The aim of our study is to examine whether the HRQOLphysical independently contributes to heart rate variability (HRV), which reflects ANS activity...
October 21, 2016: Health and Quality of Life Outcomes
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