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Heart rate variability

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https://www.readbyqxmd.com/read/29334641/do-clinically-anxious-children-cluster-according-to-their-expression-of-factors-that-maintain-child-anxiety
#1
Samantha Pearcey, Anna Alkozei, Bhismadev Chakrabarti, Helen Dodd, Kou Murayama, Suzannah Stuijfzand, Cathy Creswell
BACKGROUND: Cognitive Behaviour Therapy (CBT) is an effective treatment for childhood anxiety disorders, yet a significant proportion of children do not benefit from it. CBT for child anxiety disorders typically includes a range of strategies that may not all be applicable for all affected children. This study explored whether there are distinct subgroups of children with anxiety disorders who are characterized by their responses to measures of the key mechanisms that are targeted in CBT (i...
January 3, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29334522/themes-in-literature-related-to-incidence-risk-and-prevention-of-cancer-in-solid-organ-transplantation-recipients-on-immunosuppressive-therapy
#2
Stefanie L Rashti
BACKGROUND: Solid-organ transplants provide a second chance to thousands of critically ill patients with end-organ failure each year. Immunosuppressants are administered to patients to prevent graft rejection of a transplanted organ, such as a heart, kidney, or liver, while placing the recipient at greater risk for infection and cancer. OBJECTIVE: The literature provides evidence of various cancers that have been found to develop in patients' posttransplantation...
January 12, 2018: Cancer Nursing
https://www.readbyqxmd.com/read/29333722/cardiovascular-adjustments-during-anticipated-postural-changes
#3
Neesirg M Patel, Ethan A G Baker, Samuel R Wittman, Isaiah C Engstrom, George H Bourdages, Andrew A McCall, Derek M Miller, Bill J Yates
It is well-documented that feedforward cardiovascular responses occur at the onset of exercise, but it is unclear if such responses are associated with other types of movements. In this study, we tested the hypothesis that feedforward cardiovascular responses occur when a passive (imposed) 60° head-up tilt is anticipated, such that changes in heart rate and carotid artery blood flow (CBF) commence prior to the onset of the rotation. A light cue preceded head-up tilts by 10 sec, and heart rate and CBF were determined for 5-sec time periods prior to and during tilts...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29333515/changes-in-autonomic-nervous-system-activity-after-treatment-with-alpha-blocker-in-men-with-lower-urinary-tract-symptoms
#4
Kang Hee Shim, Tae Woo Kim, Byung Ha Chung, Sung Won Lee, Jong Kwan Park, Kwangsung Park, Jun Cheon, Kyung Seop Lee, Hyung-Jee Kim, Do-Hwan Seong, Seung-June Oh, Sae Woong Kim, Ji Youl Lee, Seol Ho Choo, Jong Bo Choi
Purpose: To determine changes in autonomic nervous system activity after treatment in men with lower urinary tract symptoms (LUTS), we evaluated changes in patients' symptoms, uroflowmetry, and heart rate variability (HRV) after treatment with alpha-blockers for 12 weeks. Materials and Methods: Ninety-five men who had LUTS (International Prostate Symptom Score [IPSS] ≥8) were included in this study. We divided them into two groups on the basis of a low frequency/high frequency (LF/HF) ratio of 1...
January 2018: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/29333483/how-heart-rate-variability-affects-emotion-regulation-brain-networks
#5
Mara Mather, Julian Thayer
Individuals with high heart rate variability tend to have better emotional well-being than those with low heart rate variability, but the mechanisms of this association are not yet clear. In this paper, we propose the novel hypothesis that by inducing oscillatory activity in the brain, high amplitude oscillations in heart rate enhance functional connectivity in brain networks associated with emotion regulation. Recent studies using daily biofeedback sessions to increase the amplitude of heart rate oscillations suggest that high amplitude physiological oscillations have a causal impact on emotional well-being...
February 2018: Current Opinion in Behavioral Sciences
https://www.readbyqxmd.com/read/29332747/effects-of-spinal-manipulation-and-myofascial-techniques-on-heart-rate-variability-a-systematic-review
#6
Bruno Luis Amoroso Borges, Gustavo Luiz Bortolazzo, Hugo Pasin Neto
BACKGROUND: The analysis of heart rate variability is important to the investigation of stimuli from the autonomic nervous system. Osteopathy is a form of treatment that can influence this system in healthy individuals as well as those with a disorder or disease. OBJECTIVES: The aim of the present study was to perform a systematic review of the literature regarding the effect of spinal manipulation and myofascial techniques on heart rate variability. METHODS: Searches were performed of the Pubmed, Scielo, Lilacs, PEDro, Ibesco, Cochrane and Scopus databases for relevant studies...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29331535/estrogen-deprivation-aggravates-cardiometabolic-dysfunction-in-obese-insulin-resistant-rats-through-the-impairment-of-cardiac-mitochondrial-dynamics
#7
Wanitchaya Minta, Siripong Palee, Duangkamol Mantor, Wissuta Sutham, Thidarat Jaiwongkum, Sasiwan Kerdpoo, Wasana Pratchayasakul, Sirinart Kumfu, Siriporn C Chattipakorn, Nipon Chattipakorn
The incidence of cardiovascular disease and metabolic syndrome increases after the onset of menopause, suggesting estrogen has a vital role in their prevention. Mitochondrial dynamics are known to play an important role in the maintenance of cardiac physiological function. However, the effects of estrogen deprivation on cardiometabolic status and cardiac mitochondrial dynamics under conditions of obese-insulin resistance have never been investigated. We hypothesized that estrogen deprivation aggravates cardiac dysfunction through increased cardiac mitochondrial fission in obese-insulin resistant rats...
January 10, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29331491/investigating-the-relationship-between-cardiac-interoception-and-autonomic-cardiac-control-using-a-predictive-coding-framework
#8
Andrew P Owens, Karl J Friston, David A Low, Christopher J Mathias, Hugo D Critchley
Predictive coding models, such as the 'free-energy principle' (FEP), have recently been discussed in relation to how interoceptive (afferent visceral feedback) signals update predictions about the state of the body, thereby driving autonomic mediation of homeostasis. This study appealed to 'interoceptive inference', under the FEP, to seek new insights into autonomic (dys)function and brain-body integration by examining the relationship between cardiac interoception and autonomic cardiac control in healthy controls and patients with forms of orthostatic intolerance (OI); to (i) seek empirical support for interoceptive inference and (ii) delineate if this relationship was sensitive to increased interoceptive prediction error in OI patients during head-up tilt (HUT)/symptom provocation...
January 9, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29330222/increased-sympathovagal-imbalance-evaluated-by-heart-rate-variability-is-associated-with-decreased-cardiac-t2-and-lv-function-in-transfusion-dependent-thalassemia-patients
#9
Sintip Pattanakuhar, Arintaya Phrommintikul, Adisak Tantiworawit, Sasikarn Konginn, Somdet Srichairattanakool, Siriporn C Chattipakorn, Nipon Chattipakorn
Early detection of iron overload cardiomyopathy is an important strategy in decreasing the mortality rate of patients with transfusion dependent thalassemia (TDT).  Although cardiac magnetic resonance (CMR) T2* is effective in detecting cardiac iron deposition, it is costly and not generally available.  We investigated whether heart rate variability (HRV) can be used as a screening method of iron overload cardiomyopathy in TDT patients.  HRV, evaluated by 24-hour Holter monitoring, non-transferrin bound iron (NTBI), serum ferritin, left ventricular ejection fraction (LVEF), and CMR-T2* were determined...
January 12, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29330044/effects-of-acupuncture-on-the-heart-rate-variability-cortisol-levels-and-behavioural-response-induced-by-thunder-sound-in-beagles
#10
Carolina Elisabetta Martins Maccariello, Carla Caroline Franzini de Souza, Laura Morena, Daniel Penteado Martins Dias, Magda Alves de Medeiros
Sound stimuli such as fireworks, firearms, and claps of thunder have been used as a stress reactivity model for dogs. Acupuncture has been widely used to treat and prevent physiological and behavioural disorders induced by stress. Our study aims to evaluate the effects of acupuncture on cardiac autonomic modulation (heart rate variability - HRV), behavioural (reactivity) and endocrine (cortisol levels) responses in dogs exposed to sounds of thunder. Twenty-four laboratory beagles (12 males and 12 females, 1-6years old) with no history of phobia to thunder were subjected to a sound stimulus that consisted of a standardized recording of thunder over a 150s period with a maximum intensity of 103-104dB...
January 9, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29329913/predicting-extubation-outcomes-a-model-incorporating-heart-rate-characteristics-index
#11
Nitin Goel, Mallinath Chakraborty, William John Watkins, Sujoy Banerjee
OBJECTIVE: To test the hypothesis that in neonates on mechanical ventilation, heart rate characteristics index (HRCi) can be combined with a clinical model for predicting extubation outcomes in neonates. STUDY DESIGN: HRCi and clinical data for all intended intubation-extubation events (episodes) were retrospectively analyzed between June 2014 and January 2015. Each episode started 6 hours pre-extubation or at the time of primary intubation if ventilation duration was shorter than 6 hours (baseline)...
January 10, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29329523/early-commitment-of-cardiovascular-autonomic-modulation-in-brazilian-patients-with-congenital-generalized-lipodystrophy
#12
Clarisse Mourão Melo Ponte, Virgínia Oliveira Fernandes, Maria Helane Costa Gurgel, Izabella Tamira Galdino Farias Vasconcelos, Lia Beatriz de Azevedo Souza Karbage, Christiane Bezerra Rocha Liberato, Carlos Antônio Negrato, Marília de Brito Gomes, Ana Paula Dias Rangel Montenegro, Renan Magalhães Montenegro Júnior
BACKGROUND: Metabolic abnormalities in congenital generalized lipodystrophy (CGL) are associated with microvascular complications. However, the evaluation of different types of neuropathy in these patients, including the commitment of cardiovascular autonomic modulation, is scarce. The objective of the present study was to determine the prevalence of cardiovascular autonomic neuropathy (CAN) in patients with CGL compared with individuals with type 1 diabetes and healthy subjects. METHODS: Ten patients with CGL, 20 patients with type 1 diabetes and 20 healthy subjects were included in the study...
January 12, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29328025/the-peculiarities-of-the-state-of-the-autonomic-nervous-system-estimated-by-the-method-of-heart-rate-variability-in-patients-with-cirrhosis-and-syntropic-damages-of-cardiovascular-system
#13
O Abrahamovych, M Abrahamovych, M Farmaha, S Tolopko
In the article the features of the autonomic nervous system state were estimated by the method of heart rate variability in patients with cirrhosis with syntropic damages of cardiovascular system - cardiomyopathy and arterial hypotension. As a result of an examination of 50 patients with liver cirrhosis and cardiomyopathy (investigational group A), 54 patients with liver cirrhosis and arterial hypotension (investigational group B), and 45 patients with liver cirrhosis also those who don't have the damages of cardiovascular system (group of comparison) it was established that: 1) they have the peculiarities of vegetative imbalance the characteristics of which are the low summarized activity of vegetative influence on heart rhythm and special dynamics of indexes of percentage structure of general spectral power; 2) they depend on the clinical variant of this damage - in patients with cirrhosis and syntropic cardiomyopathy the regulating of internal processes involve the humoral-metabolic influence, i...
December 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29327087/use-of-portable-digital-devices-to-analyze-autonomic-stress-response-in-psychology-objective-structured-clinical-examination
#14
Ana Isabel Beltrán-Velasco, Alberto Bellido-Esteban, Pablo Ruisoto-Palomera, Vicente Javier Clemente-Suárez
The aim of the present study was to explore changes in the autonomic stress response of Psychology students in a Psychology Objective Structured Clinical Examination (OSCE) and their relationship with OSCE performance. Variables of autonomic modulation by the analysis of heart rate variability in temporal, frequency and non-linear domains, subjective perception of distress strait and academic performance were measured before and after the two different evaluations that composed the OSCE. A psychology objective structured clinical examination composed by two different evaluation scenarios produced a large anxiety anticipatory response, a habituation response in the first of the evaluation scenarios and a in the entire evaluation, and a no habituation response in the second evaluation scenario...
January 12, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29326171/abdominal-vagal-afferents-modulate-the-brain-transcriptome-and-behaviors-relevant-to-schizophrenia
#15
Melanie Klarer, Jean-Philippe Krieger, Juliet Richetto, Ulrike Weber-Stadlbauer, Lydia Günther, Christine Winter, Myrtha Arnold, Wolfgang Langhans, Urs Meyer
Reduced activity of vagal efferents has long been implicated in schizophrenia and appears to be responsible for diminished parasympathetic activity and associated peripheral symptoms such as low heart rate variability and cardiovascular complications in affected individuals. In contrast, only little attention has been paid to the possibility that impaired afferent vagal signaling may be relevant for the disorder's pathophysiology as well. The present study explored this hypothesis using a model of subdiaphragmatic vagal deafferentation (SDA) in male rats...
January 11, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29324640/heart-rate-variability-frequency-domain-alterations-among-healthy-nurses-exposed-to-prolonged-work-stress
#16
Rossana Borchini, Giovanni Veronesi, Matteo Bonzini, Francesco Gianfagna, Oriana Dashi, Marco Mario Ferrario
The deregulation of the autonomic nervous system assessed through the heart rate variability (HRV) analysis is a promising pathway linking work stress and cardiovascular diseases. We aim to investigate the associations between HRV High Frequency (HF) and Low Frequency (LF) powers and work stress in a sample of 36 healthy nurses. Perceived work stress was assessed twice one year apart, using the Job Content and Effort Reward Imbalance questionnaires. This allows to classify nurses in three exposure groups: "prolonged high stress" (PHS), "recent high stress" (RHS) and "stable low stress" (SLS)...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29324576/intermittent-cooling-during-judo-training-in-a-warm-humid-environment-reduces-autonomic-and-hormonal-impact
#17
Eduardo Carballeira, José Morales, David H Fukuda, María L Granada, Vicente Carratalá-Deval, Alfonso López Díaz de Durana, Jeffrey R Stout
The purpose of this study was to identify the effects of superficial cooling on physiological responses while training in a warm, humid environment during an international judo training camp. Sixteen judokas (8 women and 8 men) participated in the experiment. Four high-level women and four men were randomly assigned to wear a cooling vest (vest group, VG) during the recovery periods within a training session (i.e. 8 bouts of 5 min fighting with 5 min rest) and up to 10 min after the session, while the remaining athletes in the control group (CG) trained without the use of any cooling aids...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29321796/heart-rate-variability-a-new-tool-to-predict-complications-in-adult-cardiac-surgery
#18
Antonio Nenna, Mario Lusini, Cristiano Spadaccio, Francesco Nappi, Salvatore Matteo Greco, Raffaele Barbato, Elvio Covino, Massimo Chello
Heart rate variability (HRV) refers to the variations between consecutive heartbeats, which depend on the continuous modulation of the sympathetic and parasympathetic branches of the autonomic nervous system. HRV has been shown to be effective as a predictor of risk after myocardial infarction and an early warning sign of diabetic neuropathy, and in the cardiology setting is now recognized to be a useful tool for risk-stratification after hospital admission and after discharge. Recent evidences suggest that HRV analysis might predict complications even in patients undergoing cardiac surgery, and the present review summarizes the importance of HRV analysis in adult cardiac surgery and the perspectives for HRV use in current clinical practice...
November 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/29321066/perioperative-management-of-antiplatelet-therapy-in-patients-undergoing-non-cardiac-surgery-following-coronary-stent-placement-a-systematic-review
#19
Christopher P Childers, Melinda Maggard-Gibbons, Jesus G Ulloa, Ian T MacQueen, Isomi M Miake-Lye, Roberta Shanman, Selene Mak, Jessica M Beroes, Paul G Shekelle
BACKGROUND: The correct perioperative management of antiplatelet therapy (APT) in patients undergoing non-cardiac surgery (NCS) is often debated by clinicians. American College of Cardiology (ACC) and American Heart Association (AHA) guidelines recommend postponing elective NCS at least 3 months after stent implantation. Regardless of the timing of surgery, ACC/AHA guidelines recommend continuing at least ASA throughout the perioperative period and ideally continuing dual APT (DAPT) therapy "unless surgery demands discontinuation...
January 10, 2018: Systematic Reviews
https://www.readbyqxmd.com/read/29320885/a-pilot-study-validating-select-research-grade-and-consumer-based-wearables-throughout-a-range-of-dynamic-exercise-intensities-in-persons-with-and-without-type-1-diabetes-a-novel-approach
#20
Loren Yavelberg, Dessi Zaharieva, Ali Cinar, Michael C Riddell, Veronica Jamnik
BACKGROUND: The increasing popularity of wearable technology necessitates the evaluation of their accuracy to differentiate physical activity (PA) intensities. These devices may play an integral role in customizing PA interventions for primary prevention and secondary management of chronic diseases. For example, in persons with type 1 diabetes (T1D), PA greatly affects glucose concentrations depending on the intensity, mode (ie, aerobic, anaerobic, mixed), and duration. This variability in glucose responses underscores the importance of implementing dependable wearable technology in emerging avenues such as artificial pancreas systems...
January 1, 2018: Journal of Diabetes Science and Technology
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