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https://www.readbyqxmd.com/read/29161745/resting-autonomic-function-in-active-and-insufficiently-active-people-living-with-hiv
#1
Norberto Quiles, Carol Garber, Joseph Ciccolo
Autonomic dysfunction appears to be prevalent in people living with HIV/AIDS (PLWHA). However, there are limited data on the resting autonomic responses to exercise in active and insufficiently active PLWHA. We aimed to determine whether active PLWHA have better autonomic responses compared with insufficiently active PLWHA. Active PLWHA receiving anti-retroviral therapy (n=13) and insufficiently active PLWHA (n=10) were recruited. A 10-min recording of the supine electrocardiogram was taken. Resting heart rate variability was analyzed from this electrocardiogram...
November 21, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29161639/specification-plasticity-and-evolutionary-origin-of-peripheral-glial-cells
#2
REVIEW
Maria Eleni Kastriti, Igor Adameyko
Peripheral glia includes predominantly myelinating and non-myelinating Schwann cells in addition to satellite, terminal and enteric glia as well as other unresolved subtypes with localized functions. Of these subtypes, all of them originate from neural crest-derived embryonic Schwann cell precursors (SCPs). Specific gene regulatory networks control neural crest specification and downstream events, including SCP differentiation and myelination. Embryonic SCPs are multipotent and generate neuroendocrine cells, parasympathetic and enteric neurons, melanocytes and other cell types...
November 18, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/29159698/analysis-of-biosignals-during-immersion-in-computer-games
#3
Mina Yeo, Seokbeen Lim, Gilwon Yoon
The number of computer game users is increasing as computers and various IT devices in connection with the Internet are commonplace in all ages. In this research, in order to find the relevance of behavioral activity and its associated biosignal, biosignal changes before and after as well as during computer games were measured and analyzed for 31 subjects. For this purpose, a device to measure electrocardiogram, photoplethysmogram and skin temperature was developed such that the effect of motion artifacts could be minimized...
November 17, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29153107/interictal-cardiac-autonomic-nervous-system-disturbances-in-dogs-with-idiopathic-epilepsy
#4
M Musteata, D Mocanu, G D Stanciu, M Armasu, G Solcan
Autonomic nervous system (ANS) activity in the interictal period (InIp) in dogs with presumed idiopathic epilepsy (pIE) was assessed using heart rate variability (HRV) analysis. The HRVs obtained from 28 pIE dogs with interictal epileptic discharges (InIEd; 11 with treatment and 17 without treatment) detected on electroencephalography (EEG) were compared with those obtained from 13 healthy dogs. On electrocardiographic (ECG) study, the P wave dispersion (PWD; P<0.001), P max (P=0.004) and corrected QT interval (QTc; P=0...
October 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29150789/radial-pulse-and-electrocardiography-modulation-by-mild-thermal-stresses-applied-to-feet-an-exploratory-study-with-randomized-crossover-design
#5
Jang-Han Bae, Boncho Ku, Young Ju Jeon, Hyunho Kim, Jihye Kim, Haebeom Lee, Jong Yeol Kim, Jaeuk U Kim
OBJECTIVE: To investigate the changes in radial pulse induced by thermal stresses (TSs). METHODS: Sixty subjects were enrolled. Using an open-label, 2×2 crossover randomization design, both feet of each subject were immersed in 15 °C water for cold stress (CS) and in 40 °C water for heat stress (HS) for 5 min each. Radial pulse, respiration and electrocardiogram (ECG) signals were recorded before, during and immediately after the TSs. RESULTS: The analysis of heart rate variability revealed that CS increased the low-frequency (LF) and high-frequency (HF) components (P <0...
November 17, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29148059/theophilline-as-an-adjunct-to-control-malignant-ventricular-arrhythmia-associated-with-early-repolarization
#6
Tilman Perrin, Regis Guieu, Linda Koutbi, Frédéric Franceschi, Jérôme Hourdain, Michele Brignole, Jean-Claude Deharo
Early repolarization (ER) has been associated with an increased risk of sudden cardiac arrest. Interestingly, ventricular arrhythmias seem to be triggered by parasympathetic stimulation. In the present case report, we describe complete control of highly frequent malignant ventricular arrhythmias after adding theophylline to ineffective oral hydroquinidine and high-rate pacing in a patient suffering from malignant ER. We hypothesize that the theophylline-mediated enhanced beta-adrenergic stimulation could reduce the transmural myocardial voltage discrepancy by increasing the inward ICa,L current...
November 16, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29144026/heart-rate-variability-and-implication-for-sport-concussion
#7
REVIEW
Scott A Bishop, Ryan T Dech, Przemyslaw Guzik, J Patrick Neary
Finding sensitive and specific markers for sports-related concussion is both challenging and clinically important. Such biomarkers might be helpful in the management of patients with concussion (i.e. diagnosis, monitoring and risk prediction). Among many parameters, blood flow-pressure metrics and heart rate variability (HRV) have been used to gauge concussion outcomes. Reports on the relation between HRV and both acute and prolonged concussion recovery are conflicting. While some authors report on differences in the low-frequency (LF) component of HRV during postural manipulations and postexercise conditions, others observe no significant differences in various HRV measures...
November 16, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29143123/recovery-of-the-cardiac-autonomic-nervous-and-vascular-system-after-maximal-cardiopulmonary-exercise-testing-in-recreational-athletes
#8
Heidi Weberruss, Johannes Maucher, Renate Oberhoffer, Jan Müller
OBJECTIVE: The body's adaptation to physical exercise is modulated by sympathetic and parasympathetic (vagal) branches of the autonomic nervous system (ANS). Heart rate variability (HRV), the beat-to-beat variation of the heart, is a proxy measure for ANS activity, whereas blood pressure (BP) is an indicator for cardiovascular function. Impaired vagal activity and lower BP is already described after exercise. However, inconsistent results exist about how long vagal recovery takes and how long post-exercise hypotension persists...
November 15, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29138216/autonomic-regulation-of-the-immune-system-in-cardiovascular-diseases
#9
François M Abboud, Madhu V Singh
The autonomic nervous system is a powerful regulator of circulatory adjustments to acute hemodynamic stresses. Here we focus on new concepts that emphasize the chronic influence of the sympathetic and parasympathetic systems on cardiovascular pathology. The autonomic neurohumoral system can dramatically influence morbidity and mortality from cardiovascular disease through newly discovered influences on the innate and adaptive immune systems. Specifically, the end-organ damage in heart failure or hypertension may be worsened or alleviated by pro- or anti-inflammatory pathways of the immune system, respectively, that are activated through neurohumoral transmitters...
December 1, 2017: Advances in Physiology Education
https://www.readbyqxmd.com/read/29137013/combination-of-ewing-test-heart-rate-variability-and-heart-rate-turbulence-analysis-for-early-diagnosis-of-diabetic-cardiac-autonomic-neuropathy
#10
Kun Lin, Liling Wei, Zhihua Huang, Qiong Zeng
The aim of this study was to compare and analyze Ewing test, heart rate variability (HRV), and heart rate turbulence (HRT) in the diagnosis of cardiac autonomic neuropathy (CAN) in diabetic patients.Ninety diabetic patients (age 18-78) and 20 nondiabetic control subjects were studied. Standard Ewing test and 24-hour Holter was performed in all participants to evaluate CAN. Patients with Ewing score ≥2 were classified as CAN+.The rate of CAN+ in diabetic patients [44.4% (40/90)] was higher than that in the controls [5% (1/20)] (P < ...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135695/short-term-impact-of-assisted-deliveries-evaluation-based-on-behavioral-pain-scoring-and-heart-rate-variability
#11
Thameur Rakza, Laura Butruille, Ms Lucille Thirel, Veronique Houfflin-Debarge, Régis Logier, Laurent Storme, Julien DE Jonckheere
OBJECTIVES: Assisted deliveries are used in current practice by obstetrical teams during labor when the fetus is likely to face difficulties. In this study, we hypothesized that pain related to instrumental delivery could impair autonomic nervous system activity. METHODS: We investigated infants born by spontaneous delivery (SD group, n=35) and those whose deliveries were assisted by vacuum, forceps or both (AD group, n=35) between the 2 and 4 hours of life. Pain was evaluated using the EDIN behavioral pain scale (Neonatal Pain and Discomfort Scale)...
November 10, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/29126304/sdhc-promoter-methylation-a-novel-pathogenic-mechanism-in-parasympathetic-paragangliomas
#12
Cristóbal Bernardo-Castiñeira, Nuria Valdés, Marta I Sierra, Inés Sáenz-de-Santa-María, Gustavo F Bayón, Raúl F Perez, Agustín F Fernández, Mario F Fraga, Aurora Astudillo, Rafael Menéndez, Belén Fernández, Maribel Del Olmo, Carlos Suarez, María-Dolores Chiara
Context: Germline mutations in the succinate dehydrogenase A, B, C, and D genes (collectively, SDHx) predispose to the development of paragangliomas (PGLs) arising at the parasympathetic or sympathetic neuroendocrine systems. SDHx mutations cause absence of tumoral immunostaining for SDHB. However, negative SDHB-immunostaining has also been found in a subset of PGLs that lack SDHx mutations. Settings: Here, we report the comprehensive molecular characterization of one such a tumor of parasympathetic origin compared with healthy paraganglia and other PGLs with or without SDHx mutations...
November 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29124054/a-method-for-the-analysis-of-ap-foot-convexity-insights-into-smooth-muscle-biophysics
#13
Shailesh Appukuttan, Mithun Padmakumar, Keith L Brain, Rohit Manchanda
Action potential (AP) profiles vary based on the cell type, with cells of the same type typically producing APs with similar shapes. But in certain syncytial tissues, such as the smooth muscle of the urinary bladder wall, even a single cell is known to exhibit APs with diverse profiles. The origin of this diversity is not currently understood, but is often attributed to factors such as syncytial interactions and the spatial distribution of parasympathetic nerve terminals. Thus, the profile of an action potential is determined by the inherent properties of the cell and influenced by its biophysical environment...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29123970/physiological-markers-of-interpersonal-stress-generation-in-depression
#14
Jessica L Hamilton, Lauren B Alloy
Abnormalities in parasympathetic nervous system activity have been linked to depression, but less is known about processes underlying this relationship. The present study evaluated resting and stress-reactive respiratory sinus arrhythmia (RSA) to a laboratory stressor as predictors of daily interpersonal stress generation and depressive symptoms, whether stress generation mediated the relationship between RSA and depressive symptoms, and potential sex differences. A sample of formerly depressed 102 emerging adults (18-22 years; 78% female) completed a laboratory stressor and daily assessments of stressors and depressive symptoms over two weeks...
2017: Clinical Psychological Science
https://www.readbyqxmd.com/read/29123207/atropine-augments-cardiac-contractility-by-inhibiting-camp-specific-phosphodiesterase-type-4
#15
Ruwan K Perera, Thomas H Fischer, Michael Wagner, Matthias Dewenter, Christiane Vettel, Nadja I Bork, Lars S Maier, Marco Conti, Juergen Wess, Ali El-Armouche, Gerd Hasenfuß, Viacheslav O Nikolaev
Atropine is a clinically relevant anticholinergic drug, which blocks inhibitory effects of the parasympathetic neurotransmitter acetylcholine on heart rate leading to tachycardia. However, many cardiac effects of atropine cannot be adequately explained solely by its antagonism at muscarinic receptors. In isolated mouse ventricular cardiomyocytes expressing a Förster resonance energy transfer (FRET)-based cAMP biosensor, we confirmed that atropine inhibited acetylcholine-induced decreases in cAMP. Unexpectedly, even in the absence of acetylcholine, after G-protein inactivation with pertussis toxin or in myocytes from M2- or M1/3-muscarinic receptor knockout mice, atropine increased cAMP levels that were pre-elevated with the β-adrenergic agonist isoproterenol...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29122559/constant-hepatic-atp-concentrations-during-prolonged-fasting-and-absence-of-effects-of-cerbomed-nemos-%C3%A2-on-parasympathetic-tone-and-hepatic-energy-metabolism
#16
Sofiya Gancheva, Alessandra Bierwagen, Daniel F Markgraf, Gidon J Bönhof, Kevin G Murphy, Erifili Hatziagelaki, Jesper Lundbom, Dan Ziegler, Michael Roden
OBJECTIVE: Brain insulin-induced improvement in glucose homeostasis has been proposed to be mediated by the parasympathetic nervous system. Non-invasive transcutaneous auricular vagus nerve stimulation (taVNS) activating afferent branches of the vagus nerve may prevent hyperglycemia in diabetes models. We examined the effects of 14-min taVNS vs sham stimulation by Cerbomed Nemos(®) on glucose metabolism, lipids, and hepatic energy homeostasis in fasted healthy humans (n = 10, age 51 ± 6 yrs, BMI 25...
October 25, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29121733/pheochromocytoma-as-a-reversible-cause-of-cardiomyopathy-analysis-and-review-of-the-literature
#17
Rong Zhang, Deepashree Gupta, Stewart G Albert
CONTEXT: Pheochromocytoma and paraganglioma are rare neuroendocrine tumors which overproduce catecholamines and arise from the adrenal gland or extra-adrenal chromaffin cells of the sympathetic and parasympathetic ganglia (1). Excessive catecholamine-induced stimulation of cardiac myocytes leads to damage which manifests in several forms ranging from Takotsubo to dilated cardiomyopathy. Diagnosis of pheochromocytoma-related cardiomyopathies is often delayed due to the atypical presentation associated with many cases...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29121287/analgesia-nociception-index-for-the-assessment-of-pain-in-critically-ill-patients-a-diagnostic-accuracy-study
#18
G Chanques, T Tarri, A Ride, A Prades, A De Jong, J Carr, N Molinari, S Jaber
Background: Behavioural pain tools are used in Intensive Care Unit (ICU) patients unable to self-report their pain-intensity but need sustained efforts to educate and train the ICU team because of the subjective nature of these clinical tools. This study measured the validity and performance of an electrophysiological monitoring tool based on the spectral analysis of heart rate variability, the Analgesia Nociception Index (ANI) which varies from 0 (minimal parasympathetic tone, maximal stress-response and pain) to 100 (maximal parasympathetic tone, minimal stress-response and pain)...
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29120654/-diagnosis-and-management-of-metastatic-pheochromocytoma-and%C3%A2-paraganglioma
#19
Ivana Jochmanová, Ivica Lazúrová
Pheochromocytoma (PHEO) and paraganglioma (PGL) are rare catecholamine-producing neuroendocrine tumors arising from adrenal medulla or extra-adrenal sympathetic and parasympathetic ganglia. Most of the PHEOs/PGLs are benign tumors, but metastatic disease is common, especially in patients with particular genetic background. Although PHEOs/PGLs were described more than a century ago, diagnosis and therapy of metastatic disease are still challenging. Advances in understanding molecular and metabolic changes associated with tumorigenesis lead us to identification of the background of these tumors...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29119282/could-white-coat-ocular-hypertension-affect-to-the-accuracy-of-the-diagnosis-of-glaucoma-relationships-between-anxiety-and-intraocular-pressure-in-a-simulated-clinical-setting
#20
Jorge Luis Méndez-Ulrich, Antoni Sanz, Albert Feliu-Soler, María Álvarez, Xavier Borràs
Sixty-one healthy subjects participated in a laboratory study carried out in a simulated clinical setting. Anticipatory anxiety-state was assessed at the arrival and immediately after, with no brief phase of adaptation, measurements of intraocular pressure, heart rate, systolic and diastolic blood pressure were collected. At the end of the procedure, anxiety-trait was also assessed. Results suggest that high levels of both anxiety-state and anxiety-trait significantly predicted a clinically relevant increase of intraocular pressure...
November 8, 2017: Applied Psychophysiology and Biofeedback
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