keyword
MENU ▼
Read by QxMD icon Read
search

Cardiac parasympathetic function

keyword
https://www.readbyqxmd.com/read/28864843/pupillary-autonomic-dysfunction-in-patients-with-anca-associated-vasculitis
#1
Philipp Moog, O Eren, S Kossegg, K Valda, A Straube, M Grünke, H Schulze-Koops, M Witt
OBJECTIVE: To assess autonomic function by infrared dynamic pupillometry in patients with ANCA-vasculitis (AAV) in correlation to autonomic symptoms, disease specific clinical parameters and cardiovascular reflex tests. METHODS: Patients with AAV and healthy controls underwent pupillometry at rest and after sympathetic stimulation (cold pressor test). Three parasympathetic parameters (amplitude, relative amplitude, maximum constriction velocity) and one sympathetic parameter (late dilatation velocity) were assessed...
September 1, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28862330/defining-the-neural-fulcrum-for-chronic-vagus-nerve-stimulation-implications-for-integrated-cardiac-control
#2
Jeffrey L Ardell, Heath Nier, Mathew Hammer, E Marie Southerland, Christopher L Ardell, Eric Beaumont, Bruce H KenKnight, J Andrew Armour
BACKGROUND: Vagus nerve stimulation (VNS) is an emerging therapy for treatment of chronic heart failure and remains a standard of therapy in patients with treatment-resistant epilepsy. OBJECTIVE: To characterize heart rate (HR) responses (HRR) during the active phase of chronic VNS over a wide range of stimulation parameters in order to define optimal protocols for bidirectional bioelectronic control of the heart. METHODS: In normal canines, bipolar electrodes were chronically implanted on the cervical vagosympathetic trunk bilaterally with anode cephalad to cathode (n = 8, "cardiac" configuration) or with electrode positions reversed (n = 8, "epilepsy" configuration)...
September 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28855178/baroreflex-and-neurovascular-responses-to-skeletal-muscle-mechanoreflex-activation-in-humans-an-exercise-in-integrative-physiology
#3
Rachel C Drew
Cardiovascular adjustments to exercise, resulting in increased blood pressure (BP) and heart rate (HR), occur in response to activation of several neural mechanisms - the exercise pressor reflex, central command, and the arterial baroreflex. Neural inputs from these feedback and feedforward mechanisms integrate in the cardiovascular control centers in the brain stem, and modulate sympathetic and parasympathetic neural outflow, resulting in the increased BP and HR observed during exercise. Another specific consequence of the central neural integration of these inputs during exercise is increased sympathetic neural outflow directed to the kidneys, causing renal vasoconstriction, a key reflex mechanism involved in blood flow redistribution during increased skeletal muscle work...
August 30, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28844537/baroreflex-autonomic-control-in-human-spinal-cord-injury-physiology-measurement-and-potential-alterations
#4
REVIEW
Adina E Draghici, J Andrew Taylor
The arterial baroreflex is a primary regulator of autonomic outflow to effectively regulate acute changes in blood pressure. After a spinal cord injury (SCI), regulation of autonomic function is disrupted, although the damage of the autonomic pathways may not necessarily be related to the severity of injury (i.e. level and completeness). Nonetheless, it can be assumed that there would be greater loss of sympathetic innervation with higher level of injury and that cardiac parasympathetic control would remain intact regardless of injury level...
August 18, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28837421/comparison-of-different-volumes-of-high-intensity-interval-training-on-cardiac-autonomic-function-in-sedentary-young-women
#5
Pooja Bhati, Vishal Bansal, Jamal Ali Moiz
Purpose The present study was conducted to compare the effects of low volume of high intensity interval training (LVHIIT) and high volume of high intensity interval training (HVHIIT) on heart rate variability (HRV) as a primary outcome measure, and on maximum oxygen consumption (VO2max), body composition, and lower limb muscle strength as secondary outcome measures, in sedentary young women. Methods Thirty-six participants were recruited in this study. The LVHIIT group (n = 17) performed one 4-min bout of treadmill running at 85%-95% maximum heart rate (HRmax), followed by 3 min of recovery by running at 70% HRmax, three times per week for 6 weeks...
August 24, 2017: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/28814850/increased-parasympathetic-cardiac-modulation-in-patients-with-acute-exacerbation-of-copd-how-should-we-interpret-it
#6
Erika Zavaglia Kabbach, Adriana Mazzuco, Audrey Borghi-Silva, Ramona Cabiddu, Aline Galvão Agnoleto, Jessica Fernanda Barbosa, Luiz Carlos Soares de Carvalho Junior, Renata Gonçalves Mendes
BACKGROUND: Cardiac autonomic modulation (CAM) is impaired in patients with stable COPD. Exacerbation aggravates the patients' health status and functional capacity. While the clinical and functional effects of exacerbation are known, no studies investigated CAM during exacerbation and whether there is a relationship between CAM and functional capacity and dyspnea. METHODS: Thirty-two patients with moderate to severe COPD were enrolled into two groups: stable COPD (GSta, n=16) and acute exacerbation of COPD (GAE, n=16)...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28814663/parasympathetic-dysfunction-and-antiarrhythmic-effect-of-vagal-nerve-stimulation-following-myocardial-infarction
#7
Marmar Vaseghi, Siamak Salavatian, Pradeep S Rajendran, Daigo Yagishita, William R Woodward, David Hamon, Kentaro Yamakawa, Tadanobu Irie, Beth A Habecker, Kalyanam Shivkumar
Myocardial infarction causes sympathetic activation and parasympathetic dysfunction, which increase risk of sudden death due to ventricular arrhythmias. Mechanisms underlying parasympathetic dysfunction are unclear. The aim of this study was to delineate consequences of myocardial infarction on parasympathetic myocardial neurotransmitter levels and the function of parasympathetic cardiac ganglia neurons, and to assess electrophysiological effects of vagal nerve stimulation on ventricular arrhythmias in a chronic porcine infarct model...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28807718/autonomic-regulation-of-systemic-inflammation-in-humans-a-multi-center-blinded-observational-cohort-study
#8
Gareth L Ackland, Gary Minto, Martin Clark, John Whittle, Robert C M Stephens, Thomas Owen, Pradeep Prabhu, Ana Gutierrez Del Arroyo
OBJECTIVE: Experimental animal models demonstrate that autonomic activity regulates systemic inflammation. By contrast, human studies are limited in number and exclusively use heart rate variability (HRV) as an index of cardiac autonomic regulation. HRV measures are primarily dependent on, and need to be corrected for, heart rate. Thus, independent autonomic measures are required to confirm HRV-based findings. Here, the authors sought to replicate the findings of preceding HRV-based studies by using HRV-independent, exercise-evoked sympathetic and parasympathetic measures of cardiac autonomic regulation to examine the relationship between autonomic function and systemic inflammation...
August 12, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28760170/evaluation-of-cardiac-autonomic-function-using-heart-rate-variability-in-children-with-acute-carbon-monoxide-poisoning
#9
Cagdas Vural, Ener Cagri Dinleyici, Pelin Kosger, Ozge Bolluk, Zubeyir Kilic, Birsen Ucar
Introduction Carbon monoxide poisoning may cause myocardial toxicity and cardiac autonomic dysfunction, which may contribute to the development of life-threatening arrhythmias. We investigated the potential association between acute carbon monoxide exposure and cardiac autonomic function measured by heart rate variability. METHOD: The present study included 40 children aged 1-17 years who were admitted to the Pediatric Intensive Care Unit with acute carbon monoxide poisoning and 40 healthy age- and sex-matched controls...
August 1, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28741870/impact-of-functional-training-on-geometric-indices-and-fractal-correlation-property-of-heart-rate-variability-in-postmenopausal-women
#10
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
#11
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
#12
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 21, 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
#13
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
#14
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
#15
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
#16
Rahmi Özdemir, Özgür Olukman, Cem Karadeniz, Kıymet Çelik, Nagehan Katipoğlu, Murat Muhtar Yılmazer, Şebnem Çalkavur, Timur Meşe, Sertaç Arslanoğlu
BACKGROUND: Serum bilirubin levels beyond the physiological limits, may lead to alterations in autonomic regulation in a newborn infant. Heart rate variability (HRV), is a noninvasive and quantitative marker of the activity of the autonomic nervous system (ANS). To date, few studies have demonstrated 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 has not been investigated previously...
July 25, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28706586/influence-of-cardiac-nerve-status-on-cardiovascular-regulation-and-cardioprotection
#17
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
#18
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
#19
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
#20
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 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
keyword
keyword
63564
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"