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Vagus nerve stimulation

Sekib Sokolovic, Samir Mehmedagic
OBJECTIVE: The goal of this paper was to present the effects of the vagus nerve stimulation (VNS) on a blood pressure (BP) and heart rate (HR) in arterial hypertension patient. DESIGN AND METHOD: The pilot study (SPM-005) was designed to evaluate the eficiancy and safety profile of the neurostimulation of the cholinergic anti-inflammatory pathways using the active implantable device for the vagus nerve stimulation in rheumatoid arthritis patient. We investigated the VNS on the BP and HR in 68 years old female patient with a long-standing arterial hypertension and the lisinopril and hydrochlorothiazide in a therapy...
September 2016: Journal of Hypertension
Hanne Schevernels, Marlies E van Bochove, Leen De Taeye, Klaas Bombeke, Kristl Vonck, Dirk Van Roost, Veerle De Herdt, Patrick Santens, Robrecht Raedt, C Nico Boehler
In the current study, we explored whether vagus nerve stimulation (VNS) in patients with epilepsy, which is believed to increase norepinephrine (NE) levels via activation of the locus coeruleus, would positively affect response inhibition. Moreover, we tried to identify the dynamics of the underlying neural processes by investigating event-related potentials (ERPs) and pupil size. Patients performed a stop-signal task once when stimulation was switched on and once when it was switched off. We found a correlational pattern suggesting that patients who clinically benefit more from VNS treatment also show a larger behavioral advantage, in terms of faster response inhibition, when the vagus nerve is being stimulated...
October 12, 2016: Epilepsy & Behavior: E&B
Alberto M Saibene, Elena Zambrelli, Carlotta Pipolo, Alberto Maccari, Giovanni Felisati, Elena Felisati, Francesca Furia, Aglaia Vignoli, Maria Paola Canevini, Enrico Alfonsi
Vagus nerve stimulation (VNS) is a useful tool for drug-resistant epilepsy, but it induces known laryngeal side effects, with a significant role on patients' quality of life. VNS patients may show persistent left vocal fold (LVF) palsy at rest and/or recurrent LVF adduction during stimulation. This study aims at electromyographically evaluating laryngeal muscles abnormalities in VNS patients. We compared endoscopic laryngeal evaluation data in six VNS patients with laryngeal muscle electromyography (LMEMG) carried out on the thyroarytenoid, cricothyroid, posterior cricoarytenoid, and cricopharyngeal muscles...
October 13, 2016: European Archives of Oto-rhino-laryngology
(no author information available yet)
No abstract text is available yet for this article.
August 2016: Clinical Privilege White Paper
Bing Cao, Jun Wang, Mahadi Shahed, Beth Jelfs, Rosa H M Chan, Ying Li
Vagus nerve stimulation (VNS) can enhance memory and cognitive functions in both rats and humans. Studies have shown that VNS influenced decision-making in epileptic patients. However, the sites of action involved in the cognitive-enhancement are poorly understood. By employing a conscious rat model equipped with vagus nerve cuff electrode, we assess the role of chronic VNS on decision-making in rat gambling task (RGT). Simultaneous multichannel-recordings offer an ideal setup to test the hypothesis that VNS may induce alterations of in both spike-field-coherence and synchronization of theta oscillations across brain areas in the anterior cingulate cortex (ACC) and basolateral amygdala (BLA)...
October 12, 2016: Scientific Reports
Yana Anfinogenova
No abstract text is available yet for this article.
October 2016: Anatolian Journal of Cardiology
Barış Akdemir, David G Benditt
The vagus nerve is a major component of the autonomic nervous system and plays a critical role in many body functions including for example, speech, swallowing, heart rate and respiratory control, gastric secretion, and intestinal motility. Vagus nerve stimulation (VNS) refers to any technique that stimulates the vagus nerve, with electrical stimulation being the most important. Implantable devices for VNS are approved therapy for refractory epilepsy and for treatment-resistant depression. In the case of heart disease applications, implantable VNS has been shown to be beneficial for treating heart failure in both preclinical and clinical studies...
October 2016: Anatolian Journal of Cardiology
Min-Jee Kim, Mi-Sun Yum, Eun-Hee Kim, Yun-Jeong Lee, Junkyo Lee, Seokho Hong, Su Jeong You, Yong Soon Hwang, Tae-Sung Ko
PURPOSE: This study aimed to evaluate the long-term efficacy of vagus nerve stimulation (VNS) in children and adolescents with intractable epilepsy and identify predictive factors for responsiveness to VNS. METHODS: Medical records of pediatric patients who underwent VNS implantation at two Korean tertiary centers were reviewed. At 0.5, 1, 3, and 5 years post-VNS implantation, the frequency of the most disabling seizures in each patient was assessed. Responders were defined as showing an overall 50 % reduction from baseline seizure frequency during follow-up...
October 6, 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Simon Wostyn, Willeke Staljanssens, Leen De Taeye, Gregor Strobbe, Stefanie Gadeyne, Dirk Van Roost, Robrecht Raedt, Kristl Vonck, Pieter van Mierlo
The mechanism of action of vagus nerve stimulation (VNS) is yet to be elucidated. To that end, the effects of VNS on the brain of epileptic patients were studied. Both when VNS was switched "On" and "Off", the brain activity of responders (R, seizure frequency reduction of over 50%) was compared to the brain activity of nonresponders (NR, seizure frequency reduction of less than 50%). Using EEG recordings, a significant increase in P300 amplitude for R and a significant decrease in P300 amplitude for NR were found...
July 11, 2016: International Journal of Neural Systems
Licia Grazzi, Gabriella Egeo, Anne H Calhoun, Candace K McClure, Eric Liebler, Piero Barbanti
BACKGROUND: Menstrual migraine and menstrually related migraine attacks are typically longer, more disabling, and less responsive to medications than non-menstrual attacks. The aim of this study was to evaluate the efficacy, safety, and tolerability of non-invasive vagus nerve stimulation for the prophylactic treatment of menstrual migraine/menstrually related migraine. METHODS: Fifty-six enrolled subjects (menstrual migraine, 9 %; menstrually related migraine, 91 %), 33 (59 %) of whom were receiving other prophylactic therapies, entered a 12-week baseline period...
December 2016: Journal of Headache and Pain
James Winter, Alexandra R Cook, Dawn H Patient, Stevan R Emmett, John Tattersall, Michael J Shattock
Pre-treatment with reversible acetylcholinesterase (AChE) inhibitors is an effective strategy for reducing lethality following organophosphate nerve agent exposure. AChE inhibition may have unwanted cardiac side effects, which could be negated by adjunctive anti-cholinergic therapy. The aims of the present study were to examine the concentration-dependent effects of physostigmine on cardiac responses to vagus nerve stimulation (VNS), to test whether adjunctive treatment with hyoscine can reverse these effects and to assess the functional interaction and electrophysiological consequences of a combined pre-treatment...
September 28, 2016: Neurotoxicology
David Ojeda, Virginie Le Rolle, Hector M Romero-Ugalde, Clément Gallet, Jean-Luc Bonnet, Christine Henry, Alain Bel, Philippe Mabo, Guy Carrault, Alfredo I Hernández
Although the therapeutic effects of Vagus Nerve Stimulation (VNS) have been recognized in pre-clinical and pilot clinical studies, the effect of different stimulation configurations on the cardiovascular response is still an open question, especially in the case of VNS delivered synchronously with cardiac activity. In this paper, we propose a formal mathematical methodology to analyze the acute cardiac response to different VNS configurations, jointly considering the chronotropic, dromotropic and inotropic cardiac effects...
2016: PloS One
Poul Jennum, Anne Sabers, Jakob Christensen, Rikke Ibsen, Jakob Kjellberg
PURPOSE: We aimed to determine the health costs and social outcomes in terms of education, employment and income level after insertion of a vagus nerve stimulator (VNS) in patients with epilepsy. METHODS: This is a case-control study using Danish health care and socioeconomic register data. The analysis of the effect involved a comparison of the health care costs, occupation and income status of VNS-treated epilepsy patients with those of a control group of epilepsy patients who had a VNS implanted during the 12 months before the index date (pre-period) and during the two years after the index date (post-period)...
September 13, 2016: Seizure: the Journal of the British Epilepsy Association
Kevin D'Ostilio, Delphine Magis
Chronic primary headaches are widespread disorders which cause significant quality of life and socioprofessional impairment. Available pharmacological treatments have often a limited efficacy and/or can generate unbearable side effects. Electrical nerve stimulation is a well-known non-destructive method of pain modulation which has been recently applied to headache management. In this review, we summarise recent advances in invasive and non-invasive neurostimulation techniques targeting pericranial structures for the treatment of chronic primary headaches, chiefly migraine and cluster headache: occipital nerve, supraorbital nerve, vagus nerve, and sphenopalatine ganglion stimulations...
November 2016: Current Pain and Headache Reports
Jérémy Raffin, Jean-Claude Barthelemy, Philippe Terrat, Marie-Christine Diana, Emilie Achour, Paul Calmels, Mathieu Oriol, Thierry Busso, Lallia Hammadi, Claude Montuy-Coquard, Rémi Bouvier, Rémi Poillerat, Frédéric Roche, David Hupin
OBJECTIVE: It is well established that physical activity reduces the physiological effects of ageing. Among them, is the decrease of the autonomic nervous system (ANS) activity, which is associated with the increase of cardiovascular events and morbidities. It has been shown that high intensity cycle training can enhance the ANS activity by 30% in people with the age of 70. However, such trainings were done by old athletes, used to train at intensities that could not be tolerated by sedentary old people, such as nursing home residents...
September 2016: Annals of Physical and Rehabilitation Medicine
José Ángel García-Pedraza, Mónica García, María Luisa Martín, Nélida Eleno, Asunción Morán
5-hydroxytryptamine (5-HT) modulates the cardiac parasympathetic neurotransmission, inhibiting the bradyarrhythmia by 5-HT2 receptor activation. We aimed to determine whether the chronic selective 5-HT2 blockade (sarpogrelate) could modify the serotonergic modulation on vagal cardiac outflow in pithed rat. Bradycardic responses in rats treated with sarpogrelate (30 mg/; p.o.) were obtained by electrical stimulation of the vagal fibers (3, 6, and 9 Hz) or i.v. injections of acetylcholine (ACh; 1, 5, and 10 μg/kg)...
September 20, 2016: Journal of Cardiovascular Pharmacology
D Martínez-Vargas, A Valdés-Cruz, V M Magdaleno-Madrigal, R Fernández-Mas, S Almazán-Alvarado
BACKGROUND: The nucleus of the solitary tract (NTS) plays a determinant role in the antiepileptic effects of vagus nerve stimulation (VNS). One mechanism underlying the efficacy of VNS is the induction of cortical changes, detected by electroencephalogram (EEG), which can be mediated by the NTS through its projections to the cerebral nuclei responsible for modulating cortical activity. The effect of the electrical stimulation of the nucleus of the solitary tract (ENTS) on EEG activity and sleep states in freely moving animals is unknown...
August 26, 2016: Brain Stimulation
Sekib Sokolovic, Samir Mehmedagic
OBJECTIVE: The goal of this paper was to present the effects of the vagus nerve stimulation (VNS) on a blood pressure (BP) and heart rate (HR) in arterial hypertension patient. DESIGN AND METHOD: The pilot study (SPM-005) was designed to evaluate the eficiancy and safety profile of the neurostimulation of the cholinergic anti-inflammatory pathways using the active implantable device for the vagus nerve stimulation in rheumatoid arthritis patient. We investigated the VNS on the BP and HR in 68 years old female patient with a long-standing arterial hypertension and the lisinopril and hydrochlorothiazide in a therapy...
September 2016: Journal of Hypertension
Debbie Terry, Anup D Patel, Daniel M Cohen, Daniel Scherzer, Jennifer Kline
The purpose of this study was to assess school nurses' perceptions of barriers to optimal management of seizures in schools. Eighty-three school nurses completed an electronic survey. Most agreed they felt confident they could identify a seizure (97.6%), give rectal diazepam (83.8%), and handle cluster seizures (67.1%), but fewer were confident they could give intranasal midazolam (63.3%), had specific information about a student's seizures (56.6%), or could swipe a vagus nerve stimulator magnet (47.4%). Nurses were more likely to be available at the time of a seizure in rural (17/20) (85%) versus suburban (21/34) (62%) or urban (8/25) (32%) schools (P = ...
September 12, 2016: Journal of Child Neurology
Ashley Ralston, Patti Ogden, Michael H Kohrman, David M Frim
Vagus nerve stimulators (VNSs) are currently an accepted treatment for intractable epilepsy not amenable to ablative surgery. Battery death and lead damage are the main reasons for reoperation in patients with VNSs. In general, any damage to the lead requires revision surgery to remove the helical electrodes from the vagus nerve and replace the electrode array and wire. The electrodes are typically scarred and difficult to remove from the vagus nerve without injury. The authors describe 6 patients with VNSs who presented with low lead impedance on diagnostic testing, leading to the intraoperative finding of lead insulation disruption, or who were found incidentally at the time of implantable pulse generator battery replacement to have a tear in the outer insulation of the electrode wire...
September 9, 2016: Journal of Neurosurgery. Pediatrics
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