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Cardiac parasympathetic function

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https://www.readbyqxmd.com/read/28741870/impact-of-functional-training-on-geometric-indices-and-fractal-correlation-property-of-heart-rate-variability-in-postmenopausal-women
#1
Marianne P da C de Rezende Barbosa, Luiz C M Vanderlei, Lucas M Neves, Carolina Takahashi, Paula R Dos S Torquato, Ana Claúdia de S Fortaleza, Ismael F Freitas Júnior, Isabel C E Sorpreso, Luiz C Abreu, Andrés R Pérez Riera
BACKGROUND: To evaluate the influence of functional training on the geometric indices of heart rate variability (HRV) and fractal correlation properties of the dynamics of heart rate in menopausal women. METHODS: Of 39 women who were in the period of menopause for more than a year and who did not practice any regular physical activity were divided into: Functional training group (FTG = 50 ± 4.5 years; 67.64 ± 11.64 kg; 1.5 ± 0.05 m) that executed the functional training (FT) and all proposals by reviews and the Control group (58...
July 25, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28738697/reduction-of-heart-rate-variability-in-hypertensive-elderly
#2
Paulo Evaristo de Andrade, Joice Anaize Tonon do Amaral, Laércio da Silva Paiva, Fernando Adami, Juliana Zangirolami Raimudo, Vitor Engrácia Valenti, Luiz Carlos de Abreu, Rodrigo Daminello Raimundo
INTRODUCTION: The elderly population grows globally every day, and along with it the incidence of high blood pressure also grows, following these data scientists seek tools to improve the health of this population, a widely used tool for assessing cardiovascular function is the heart rate variability(HRV), that is a mecanism that allows the investigation of oscillations in the intervals between consecutive heart beats (RR intervals). There are already studies on the autonomic nervous system in the elderly population, however, these studies investigated normotensive patients and there is little research in hypertensive patients...
July 24, 2017: Blood Pressure
https://www.readbyqxmd.com/read/28736262/bdnf-a-key-player-in-cardiovascular-system
#3
REVIEW
Ewa Pius-Sadowska, Bogusław Machaliński
Neurotrophins (NTs) were first identified as target-derived survival factors for neurons of the central and peripheral nervous system (PNS). They are known to control neural cell fate, development and function. Independently of their neuronal properties, NTs exert unique cardiovascular activity. The heart is innervated by sensory, sympathetic and parasympathetic neurons, which require NTs during early development and in the establishment of mature properties, contributing to the maintenance of cardiovascular homeostasis...
July 20, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28731559/association-between-anthropometric-measures-of-regional-fat-mass-and-heart-rate-variability-in-obese-women
#4
Marina Rastović, Biljana Srdić-Galić, Oto Barak, Edita Stokić
AIM: Impaired autonomic function could be the mechanism for the development of cardiometabolic diseases in obesity. Hence, simple anthropometric measures of overall and central obesity could be screening markers for autonomic imbalance. We analysed the relationship between heart rate variability (HRV) parameters and obesity indicators. METHODS: Sixty-three obese women underwent blood pressure, lipids and anthropometric measurements, body composition assessment, HOMA (homeostasis model assessment) index calculation and short-term HRV analysis...
February 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28715351/interacting-influences-of-gender-and-chronic-pain-status-on-parasympathetically-mediated-heart-rate-variability-in-adolescents-and-young-adults
#5
Lynn S Walker, Amanda L Stone, Craig A Smith, Stephen Bruehl, Judy Garber, Martina Puzanovova, André Diedrich
Considerable research links chronic pain to autonomic nervous system (ANS) dysfunction, specifically low heart rate variability (HRV) mediated by reduced parasympathetic activity. However, little is known about factors that influence ANS function in chronic pain. The ANS is the primary pathway for brain-gut communication, making it of particular interest in gastrointestinal disorders, such as irritable bowel syndrome, characterized by functional abdominal pain (FAP). We evaluated the relation of sex, pain severity, and psychological stress to ANS function in adolescents/young adults from a database of pediatric FAP and control participants enrolled 8 years earlier in a prospective study of pain...
August 2017: Pain
https://www.readbyqxmd.com/read/28710030/differences-of-sympathetic-and-parasympathetic-modulation-in-major-depression
#6
Andy Schumann, Caroline Andrack, Karl-Jürgen Bär
Inconsistent results have been reported with respect to cardiac autonomic function in major depression. The aim of our study was to investigate autonomic function in various branches of the autonomic nervous system in order to better understand parasympathetic and sympathetic modulation in the disease. We investigated 29 unmedicated patients suffering from major depression (MD) in comparison to matched control subjects (gender, age, BMI). The autonomic assessment at rest included values of heart rate variability (HRV), blood pressure variability (BPV), baroreflex sensitivity (BRS), respiration, skin conductance (SC) as well as the calculation of pupillary diameter and the unrest index (PUI)...
July 12, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28707558/effect-of-unconjugated-hyperbilirubinemia-on-neonatal-autonomic-functions-evaluation-by-heart-rate-variability
#7
Rahmi Ozdemir, Ozgur Olukman, Cem Karadeniz, Kiymet Celik, Nagehan Katipoglu, Murat Muhtar Yilmazer, Sebnem Calkavur, Timur Mese, Sertac Arslanoglu
BACKGROUND: Beyond the physiological levels of bilirubin may leads to alterations in autonomic regulation. Heart rate variability (HRV), is a noninvasive and quantitative marker of the activity of the autonomic nervous system (ANS). To date, few studies have been evaluated the undesirable effects of severe unconjugated hyperbilirubinemia (UHB) on autonomic functions, and only one study has used HRV as a marker of the autonomic activity. However, the relationship between altered cardiac autonomic functions and UHB by using the HRV derived from 24-hour Holter electrocardiography (ECG) recording previously...
July 14, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28706586/influence-of-cardiac-nerve-status-on-cardiovascular-regulation-and-cardioprotection
#8
REVIEW
John G Kingma, Denys Simard, Jacques R Rouleau
Neural elements of the intrinsic cardiac nervous system transduce sensory inputs from the heart, blood vessels and other organs to ensure adequate cardiac function on a beat-to-beat basis. This inter-organ crosstalk is critical for normal function of the heart and other organs; derangements within the nervous system hierarchy contribute to pathogenesis of organ dysfunction. The role of intact cardiac nerves in development of, as well as protection against, ischemic injury is of current interest since it may involve recruitment of intrinsic cardiac ganglia...
June 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28703868/cardiac-vagal-tone-a-non-invasive-measure-of-parasympathetic-tone-is-a-clinically-relevant-tool-in-type-1-diabetes-mellitus
#9
C Brock, N Jessen, B Brock, P E Jakobsen, T K Hansen, J M Rantanen, S Riahi, Y K Dimitrova, A Dons-Jensen, Q Aziz, A M Drewes, A D Farmer
AIMS: To compare a novel index of parasympathetic tone, cardiac vagal tone, with established autonomic variables and to test the hypotheses that (1) cardiac vagal tone would be associated with established time and frequency domain measures of heart rate and (2) cardiac vagal tone would be lower in people with Type 1 diabetes than in a matched healthy cohort and lower still in people with established neuropathy. METHODS: Cardiac vagal tone is a validated cardiometrically derived index of parasympathetic tone...
July 13, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28701323/renal-denervation-attenuates-hypertension-but-not-salt-sensitivity-in-etb-receptor-deficient-rats
#10
Bryan K Becker, Amanda C Feagans, Daian Chen, Malgorzata Kasztan, Chunhua Jin, Joshua S Speed, Jennifer S Pollock, David M Pollock
Hypertension is a prevalent pathology that increases risk for numerous cardiovascular diseases. Because the etiology of hypertension varies across patients, specific and effective therapeutic approaches are needed. The role of renal sympathetic nerves is established in numerous forms of hypertension, but their contribution to salt-sensitivity and interaction with factors such as endothelin-1 are poorly understood. Rats deficient of functional ETB receptors (ETB-def) on all tissues except sympathetic nerves are hypertensive and exhibit salt-sensitive increases in blood pressure...
July 12, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28687367/the-relationship-between-erythrocyte-membrane-fatty-acid-levels-and-cardiac-autonomic-function-in-obese-children
#11
Gulgun Mustafa, Fidanci Muzaffer Kursat, Tas Ahmet, Genc Fatih Alparslan, Gunes Omer, Erdem Sertoglu, Sarı Erkan, Yesilkaya Ediz, Turker Turker, Kılıc Ayhan
OBJECTIVE: Childhood obesity is a worldwide health concern. Studies have shown autonomic dysfunction in obese children. The exact mechanism of this dysfunction is still unknown. The aim of this study was to assess the relationship between erythrocyte membrane fatty acid (EMFA) levels and cardiac autonomic function in obese children using heart rate variability (HRV). METHODS: A total of 48 obese and 32 healthy children were included in this case-control study. Anthropometric and biochemical data, HRV indices, and EMFA levels in both groups were compared statistically...
July 4, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28657825/effectiveness-of-tai-chi-on-cardiac-autonomic-function-and-symptomatology-in-women-with-fibromyalgia-a-randomized-controlled-trial
#12
Alexei Wong, Arturo Figueroa, Marcos A Sanchez-Gonzalez, Won-Mok Son, Oksana Chernykh, Song-Young Park
The present study examined the effects of a 12-week Tai Chi (TC) training regimen on heart rate variability (HRV), symptomatology, muscle fitness and body composition in women with fibromyalgia. Participants were randomly assigned to either a TC training group (n=18) or a control group (n=19). HRV, symptomatology, muscle fitness and body composition were measured before and after 12 weeks. There were significant decreases (P<0.05) in sympathovagal balance (LnLF/LnHF), sympathetic tone (LnLF, nLF), pain, fatigue and significant increases (P<0...
June 28, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28630583/acute-modification-of-cardiac-autonomic-function-of-high-intensity-interval-training-in-collegiate-male-soccer-players-with-different-chronotype-a-cross-over-study
#13
Matteo Bonato, Luca Agnello, Letizia Galasso, Angela Montaruli, Eliana Roveda, Giampiero Merati, Antonio La Torre, Jacopo A Vitale
The purpose of this study was to evaluate if the time of the day (8.00 a.m. vs 8.00 p.m.) and chronotype could influence autonomic cardiac control in soccer players in relation to an acute session of high-intensity interval training. The morningness-eveningness questionnaire was administered to recruit Morning-type and Evening-type collegiate male soccer players. Therefore, 24 players (12 Morning-types and 12 Evening-types) were randomly assigned, to either morning (n = 12; age 23 ± 3 years; height 1.75 ± 0...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28629735/chronic-fluoxetine-treatment-enhances-sympathetic-activities-associated-with-abnormality-of-baroreflex-function-in-conscious-normal-rats
#14
Ling-Zong Hong, Keh-Feng Huang, Siu-Wan Hung, Li-Te Kuo
Data regarding the effects of selective serotonin reuptake inhibitors (SSRIs), which are a common type of antidepressants, on cardiovascular autonomic function are inconsistent. The present study was conducted to determine the effects of chronic fluoxetine, an SSRI, on blood pressure, cardiac autonomic nervous activities and baroreflex control of heart rate. Male Sprague-Dawley rats were treated with fluoxetine (10mg/kg day, p.o.) or saline for 14 weeks. Baroreflex function was determined by the sigmoid logistic method based on the heart rate responses to changes in blood pressure elicited by phenylephrine or sodium nitroprusside infusions...
June 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28615966/acute-physiological-and-electrical-accentuation-of-vagal-tone-has-no-effect-on-pain-or-gastrointestinal-motility-in-chronic-pancreatitis
#15
Jacob Juel, Christina Brock, Søren S Olesen, Adnan Madzak, Adam D Farmer, Qasim Aziz, Jens B Frøkjær, Asbjørn Mohr Drewes
BACKGROUND: The effective management of pain in chronic pancreatitis (CP) remains a therapeutic challenge. Analgesic drugs, such as opioids, and the underlying pathology can impair gut function. The autonomic nervous system influences hormone secretion and gut motility. In healthy volunteers, electrical (using noninvasive transcutaneous vagal nerve stimulation [t-VNS]) and physiological (using deep slow breathing [DSB]) modulation of parasympathetic tone results in pain attenuation and enhanced gut motility...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28605971/impaired-baroreflex-function-during-orthostatic-challenge-in-patients-after-spinal-cord-injury
#16
Katarina Ondrusova, Jana Svacinova, Michal Javorka, Jan Novak, Marie Novakova, Zuzana Novakova
The level of spinal cord injury (SCI) affects baroreflex regulation of blood pressure (BP). While a parasympathetic cardiac chronotropic effect is preserved, baroreflex response could be impaired by sympathetic dysfunction under the SCI level. This study was aimed to evaluate the baroreflex function in SCI patients by the analysis of causal interaction between systolic blood pressure (SBP) and inter-beat intervals (IBI). BP was continuously recorded in 13 cervical SCI patients (CSCI), 9 thoracic SCI (ThSCI) and 13 able-bodied controls (Con) during two phases: sitting (PS) and orthostatic challenge (PO)...
June 12, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28548300/first-night-effect-on-cardiac-autonomic-function-in-different-female-reproductive-states
#17
Irina Virtanen, Nea Kalleinen, Anna S Urrila, Päivi Polo-Kantola
Decreases in heart rate variability, a marker of autonomic nervous system function, are associated with increased cardiovascular mortality. Heart rate variability increases in non-rapid eye movement sleep, peaking in slow-wave sleep. Therefore, decreasing the amount of deep sleep, for example, by introducing patients to a sleep laboratory environment, could decrease heart rate variability, increasing cardiovascular risk. We studied four groups of women with no previous sleep laboratory experience: young [n = 11, 23...
May 26, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28533740/correlation-of-ventricular-arrhythmogenesis-with-neuronal-remodeling-of-cardiac-postganglionic-parasympathetic-neurons-in-the-late-stage-of-heart-failure-after-myocardial-infarction
#18
Dongze Zhang, Huiyin Tu, Chaojun Wang, Liang Cao, Robert L Muelleman, Michael C Wadman, Yu-Long Li
Introduction: Ventricular arrhythmia is a major cause of sudden cardiac death in patients with chronic heart failure (CHF). Our recent study demonstrates that N-type Ca(2+) currents in intracardiac ganglionic neurons are reduced in the late stage of CHF rats. Rat intracardiac ganglia are divided into the atrioventricular ganglion (AVG) and sinoatrial ganglion. Only AVG nerve terminals innervate the ventricular myocardium. In this study, we tested the correlation of electrical remodeling in AVG neurons with ventricular arrhythmogenesis in CHF rats...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28493111/parasympathetic-regulation-and-inhibitory-control-predict-the-development-of-externalizing-problems-in-early-childhood
#19
Sarah Kahle, William T Utendale, Keith F Widaman, Paul D Hastings
The current report examined the longitudinal relations between cognitive self-regulation, physiological self-regulation, and externalizing problems. At age 4 (n = 98; 49 girls) and 6 (n = 87; 42 girls), children completed the Day-Night task, which taps the inhibitory control dimension of executive function. During the task, cardiac activity was measured and respiratory sinus arrhythmia (RSA) was derived as an index of parasympathetic activity. Mothers reported on externalizing problems. A cross-lagged path model was used to estimate longitudinal predictions while controlling for stability in all constructs over time...
May 10, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28483340/cardiovascular-autonomic-dysfunction-in-women-with-polycystic-ovary-syndrome-a-systematic-review-and-meta-analysis
#20
REVIEW
Juan Gui, Rui-Hao Wang
Recent studies reveal that polycystic ovary syndrome (PCOS) might be associated with cardiovascular autonomic dysfunction, but with inconsistent results. The aim of this meta-analysis was to study whether women with PCOS have cardiovascular autonomic dysfunction. PubMed, Web of Science, Cochrane Library and SCOPUS were searched for studies comparing cardiovascular function between women with PCOS and controls. A random-effects model was used to evaluate cardiac autonomic modulation and muscle sympathetic nerve activity (MSNA) between women with PCOS and controls...
April 7, 2017: Reproductive Biomedicine Online
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