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https://www.readbyqxmd.com/read/29350262/vagal-nerve-stimulation-for-medically-refractory-epilepsy-in-angelman-syndrome-a-series-of-three-cases
#1
REVIEW
Krystal L Tomei, Christine Y Mau, Michael Ghali, Jayoung Pak, Ira M Goldstein
BACKGROUND: We describe three children with Angelman syndrome and medically refractory epilepsy. METHODS: Case series of three pediatric patients with Angelman syndrome and medically refractory epilepsy. All three patients failed medical treatment and were recommended for vagal nerve stimulator (VNS) implantation. RESULTS: Following VNS implantation, all three patients experienced reduction in seizure frequency greater than that afforded by medication alone...
January 19, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29336393/cardiac-surgery-in-a-patient-with-implanted-vagal-nerve-stimulator
#2
Aashish Jain, Dheeraj Arora, Yatin Mehta
The prevalence of epilepsy worldwide is around 0.5%-2% of the population. Antiepileptic medications are the first line of treatment in most of the cases but approximately 25%-30% epilepsy patients are refractory to the single or combination therapy. The surgical option for temporal lobe epilepsy is temporal lobectomy, which has its inherent risk of neurological deficits after the surgery. Patients who are either refractory to combination therapy or do not want surgical temporal lobectomy are the candidates for electrical stimulation therapy...
January 2018: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/29336017/long-term-surveillance-of-sudep-in-drug-resistant-epilepsy-patients-treated-with-vns-therapy
#3
Philippe Ryvlin, Elson L So, Charles M Gordon, Dale C Hesdorffer, Michael R Sperling, Orrin Devinsky, Mark T Bunker, Bryan Olin, Daniel Friedman
OBJECTIVE: Limited data are available regarding the evolution over time of the rate of sudden unexpected death in epilepsy patients (SUDEP) in drug-resistant epilepsy. The objective is to analyze a database of 40 443 patients with epilepsy implanted with vagus nerve stimulation (VNS) therapy in the United States (from 1988 to 2012) and assess whether SUDEP rates decrease during the postimplantation follow-up period. METHODS: Patient vital status was ascertained using the Centers for Disease Control and Prevention's National Death Index (NDI)...
January 16, 2018: Epilepsia
https://www.readbyqxmd.com/read/29322966/the-influence-of-adjunctive-caudal-epidural-steroid-injection-on-the-therapeutic-effect-of-transforaminal-epidural-steroid-injection
#4
Atilla Kircelli, Tufan Cansever, Cem Yılmaz
BACKGROUND: Epidural steroid injection is widely used to treat the short and long-term symptoms of low back and radicular pain. To the best of our knowledge, the influence of transforaminal epidural steroid injection (TFSI) combined with caudal epidural steroid injection (CESI) on pain intensity, patient satisfaction, and quality of life in lumbar radiculopathy has not been examined. AIM: To evaluate the short and long-term efficacy of TFSI, and TFSI combined with CESI (TFSI + CESI) in patients with lumbar radiculopathy...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29306976/deep-brain-stimulation-of-the-anterior-nucleus-of-the-thalamus-for-drug-resistant-epilepsy
#5
REVIEW
Tim A M Bouwens van der Vlis, Olaf E M G Schijns, Frédéric L W V J Schaper, Govert Hoogland, Pieter Kubben, Louis Wagner, Rob Rouhl, Yasin Temel, Linda Ackermans
Despite the use of first-choice anti-epileptic drugs and satisfactory seizure outcome rates after resective epilepsy surgery, a considerable percentage of patients do not become seizure free. ANT-DBS may provide for an alternative treatment option in these patients. This literature review discusses the rationale, mechanism of action, clinical efficacy, safety, and tolerability of ANT-DBS in drug-resistant epilepsy patients. A review using systematic methods of the available literature was performed using relevant databases including Medline, Embase, and the Cochrane Library pertaining to the different aspects ANT-DBS...
January 6, 2018: Neurosurgical Review
https://www.readbyqxmd.com/read/29297653/mechanism-of-action-of-non-invasive-cervical-vagus-nerve-stimulation-for-the-treatment-of-primary-headaches
#6
Bruce Simon, Justyna Blake
Stimulation of the cervical vagus nerve with implanted vagus nerve stimulation (iVNS) has been used clinically for more than 20 years to treat patients with epilepsy. More recently, a non-invasive cervical vagus nerve stimulation (nVNS), gammaCore, was developed, which has been purported to also stimulate the vagus nerve without the cost and morbidity associated with an iVNS system. gammaCore has been used to acutely treat various types of primary headaches, including migraine and cluster headaches (CH), and for the prevention of episodic, chronic, and menstrual migraines and CH...
November 2017: American Journal of Managed Care
https://www.readbyqxmd.com/read/29289803/application-of-a-rubber-band-with-hooks-on-both-ends-for-vagus-nerve-stimulator-implantation
#7
Hiroshi Hosoyama, Ryosuke Hanaya, Toshiaki Otsubo, Masanori Sato, Yumi Kashida, Sei Sugata, Masaya Katagiri, Koji Iida, Kazunori Arita
BACKGROUND: Vagus nerve stimulation (VNS) is a valuable therapeutic option for many types of drug-resistant epilepsy. Muscle hooks and carotid endarterectomy rings have been used for cervical delamination preceding the implantation of stimulation electrodes. The attachment on both sides of a rubber band of Kamiyama-style hanging needles, as are used for scalp and dural retraction during craniotomy, yields a useful tool for VNS implantation. Here we report our experience with this method...
December 28, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29287215/impact-of-vagus-nerve-stimulation-on-sleep-related-breathing-disorders-in-adults-with-epilepsy
#8
Aude Salvadé, Philippe Ryvlin, Andrea O Rossetti
BACKGROUND: Vagus nerve stimulation (VNS) can induce a sleep apnea syndrome (SAS), which in turn can worsen seizure control and represents a cardiovascular risk factor. Epidemiology of VNS-induced SAS has received little attention to date. The purpose of this study was to estimate the VNS-induced SAS prevalence and to explore clinical variables potentially correlating with its development. METHODS: We analyzed the computerized medical records of 18 consecutive adults treated for refractory epilepsy with VNS, implanted between May 2008 and October 2015...
December 26, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29287185/insufficient-efficacy-of-vagus-nerve-stimulation-for-epileptic-spasms-and-tonic-spasms-in-children-with-refractory-epilepsy
#9
Tohru Okanishi, Ayataka Fujimoto, Mitsuyo Nishimura, Sotaro Kanai, Hirotaka Motoi, Yoichiro Homma, Hideo Enoki
BACKGROUND: Vagus nerve stimulation (VNS) leads to palliation of refractory seizures. Epileptic spasms (ES) and tonic spasms (TS) appear in children with West syndrome and symptomatic generalized epilepsy. Both types of spasms are often characterized by truncal muscular contractions and ictal electroencephalography (EEG) findings comprising the contiguous phases: phase 1) 15-20 Hz, spindle-like fast activity (occur in 70%), 2) diffuse polyphasic δ/θ waves (100%), and 3) electrodecremental activity (70%)...
December 15, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29283224/autonomic-regulation-therapy-to-enhance-myocardial-function-in-heart-failure-patients-the-anthem-hfpef-study
#10
Lorenzo A DiCarlo, Imad Libbus, H Uday Kumar, Sanjay Mittal, Rajendra K Premchand, Badri Amurthur, Bruce H KenKnight, Jeffrey L Ardell, Inder S Anand
BACKGROUND: Approximately half of the patients presenting with new-onset heart failure (HF) have HF with preserved left ventricular ejection fraction (HFpEF) and HF with mid-range left ventricular ejection fraction (HFmrEF). These patients have neurohormonal activation like that of HF with reduced ejection fraction; however, beta-blockers and angiotensin-converting enzyme inhibitors have not been shown to improve their outcomes, and current treatment for these patients is symptom based and empiric...
December 28, 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/29274273/nicotinic-acetylcholine-receptor-alpha7-subunit-mediates-vagus-nerve-stimulation-induced-neuroprotection-in-acute-permanent-cerebral-ischemia-by-a7nachr-jak2-pathway
#11
Xin-Xin Lu, Zhong-Qiu Hong, Zhi Tan, Ming-Hong Sui, Zhi-Qiang Zhuang, Hui-Hua Liu, Xiu-Yuan Zheng, Tie-Bin Yan, Deng-Feng Geng, Dong-Mei Jin
BACKGROUND The role of nicotinic acetylcholine receptor alpha7 subunit (a7nAchR) in the treatment of acute cerebral ischemia by VNS has not been thoroughly clarified to date. Therefore, this study aimed to investigate the specific role of a7nAchR and explore whether this process is involved in the mechanisms of VNS-induced neuroprotection in rats undergoing permanent middle cerebral artery occlusion (PMCAO) surgery. MATERIAL AND METHODS Rats received a7nAChR antagonist (A) or antagonist placebo injection for control (AC), followed by PMCAO and VNS treatment, whereas the a7nAChR agonist (P) was utilized singly without VNS treatment but only with PMCAO pretreatment...
December 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29262385/-experience-and-solution-of-complications-of-vagus-nerve-stimulation-therapy-in-139-implant-patients-with-medically-refractory-epilepsy
#12
Daiki Uchida, Takamichi Yamamoto, Tomohiro Yamazoe, Kentaro Iijima, Ayataka Fujimoto, Hideo Enoki, Tokutaro Tanaka
BACKGROUND: Vagus nerve stimulation(VNS)for patients with intractable epilepsy was approved by the Japan Ministry of Health, Labour and Welfare in 2010. More than 1,500 VNS systems were implanted by the end of August 2016. The aim of the present report is to describe complications we experienced at our department and consider the way to avoid them. METHODS AND PATIENTS: We retrospectively reviewed 139 consecutive patients(122 new implantations and 17 reimplantations)between December 2010 and March 2016...
December 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/29240833/vagal-nerve-stimulation-triggers-widespread-responses-and-alters-large-scale-functional-connectivity-in-the-rat-brain
#13
Jiayue Cao, Kun-Han Lu, Terry L Powley, Zhongming Liu
Vagus nerve stimulation (VNS) is a therapy for epilepsy and depression. However, its efficacy varies and its mechanism remains unclear. Prior studies have used functional magnetic resonance imaging (fMRI) to map brain activations with VNS in human brains, but have reported inconsistent findings. The source of inconsistency is likely attributable to the complex temporal characteristics of VNS-evoked fMRI responses that cannot be fully explained by simplified response models in the conventional model-based analysis for activation mapping...
2017: PloS One
https://www.readbyqxmd.com/read/29234130/a-6-dof-navigation-method-based-on-iterative-closest-imaging-point-algorithm
#14
Shuai Shi, Zheng You, Kaichun Zhao, Zhaoyao Wang, Chenguang Ouyang, Yongkui Cao
To achieve six degree-of-freedom autonomous navigation of an inboard spacecraft, a novel algorithm called iterative closest imaging point (ICIP) is proposed, which deals with the pose estimation problem of a vision navigation system (VNS). This paper introduces the basics of the ICIP algorithm, including mathematical model, algorithm architecture, and convergence theory. On this basis, a navigation method is proposed. This method realizes its initialization using a Gaussian mixture model-based Kalman filter, which simultaneously solves the 3D-to-2D point correspondences and the camera pose...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29230011/pairing-sound-with-vagus-nerve-stimulation-modulates-cortical-synchrony-and-phase-coherence-in-tinnitus-an-exploratory-retrospective-study
#15
Sven Vanneste, Jeffrey Martin, Robert L Rennaker, Michael P Kilgard
Recent research has shown that vagus nerve stimulation (VNS) paired with tones or with rehabilitative training can help patients to achieve reductions in tinnitus perception or to expedite motor rehabilitation after suffering an ischemic stroke. The rationale behind this treatment is that VNS paired with experience can drive neural plasticity in a controlled and therapeutic direction. Since previous studies observed that gamma activity in the auditory cortex is correlated with tinnitus loudness, we assessed resting-state source-localized EEG before and after one to three months of VNS-tone pairing in chronic tinnitus patients...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29221007/energy-aware-virtual-network-embedding-in-flexi-grid-networks
#16
Rongping Lin, Shan Luo, Haoran Wang, Sheng Wang
Network virtualization technology has been proposed to allow multiple heterogeneous virtual networks (VNs) to coexist on a shared substrate network, which increases the utilization of the substrate network. Efficiently mapping VNs on the substrate network is a major challenge on account of the VN embedding (VNE) problem. Meanwhile, energy efficiency has been widely considered in the network design in terms of operation expenses and the ecological awareness. In this paper, we aim to solve the energy-aware VNE problem in flexi-grid optical networks...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29219123/chronic-cuffing-of-cervical-vagus-nerve-inhibits-efferent-fiber-integrity-in-rat-model
#17
Jesse Paul Somann, Gabriel Albors, Kaitlyn Neihouser, Kun-Han Lu, Zhongming Liu, Matthew Peter Ward, Abigail Durkes, J Paul Robinson, Terry Powley, Pedro Irazoqui
Numerous studies of vagal nerve stimulation (VNS) have been published showing it to be a potential treatment for chronic inflammation and other related diseases and disorders. Studies in recent years have shown that electrical stimulation of the vagal efferent fibers can artificially modulate cytokine levels and reduce systematic inflammation. Most VNS research in the treatment of inflammation have been acute studies on rodent subjects. Our study tested VNS on freely moving animals by stimulating and recording from the cervical vagus with nerve cuff electrodes over an extended period of time...
December 8, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29184482/identification-of-candidate-allosteric-modulators-of-the-m1-muscarinic-acetylcholine-receptor-which-may-improve-vagus-nerve-stimulation-in-chronic-tinnitus
#18
Tijana Bojić, Vladimir R Perović, Milan Senćanski, Sanja Glišić
Chronic tinnitus is characterized by neuroplastic changes of the auditory cortex. A promising method for therapy of chronic tinnitus is vagus nerve stimulation (VNS) combined with auditory stimulation. The principle of VNS is reversal of pathological neuroplastic changes of the auditory cortex toward physiological neural activity and synchronicity. The VNS mechanism of action in chronic tinnitus patients is prevailingly through the muscarinic neuromodulation of the auditory cortex by the activation of nc. basalis Meynerti...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29184345/vagus-nerve-stimulation-modulates-complexity-of-heart-rate-variability-differently-during-sleep-and-wakefulness
#19
Karthi Balasubramanian, K Harikumar, Nithin Nagaraj, Sandipan Pati
Progressive loss of heart rate variability (HRV) and complexity are associated with increased risk of mortality in patients with cardiovascular disease and are a candidate marker for patients at risk of sudden cardiac death. HRV is influenced by the cardiac autonomic nervous system (ANS), although it is unclear which arm of the ANS (sympathetic or parasympathetic) needs to be perturbed to increase the complexity of HRV. In this case-control study, we have analyzed the relation between modulation of vagus nerve stimulation (VNS) and changes in complexity of HRV as a function of states of vigilance...
October 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/29174302/the-interaction-of-pulse-width-and-current-intensity-on-the-extent-of-cortical-plasticity-evoked-by-vagus-nerve-stimulation
#20
Kristofer W Loerwald, Michael S Borland, Robert L Rennaker, Seth A Hays, Michael P Kilgard
BACKGROUND: Repeatedly pairing a tone with a brief burst of vagus nerve stimulation (VNS) results in a reorganization of primary auditory cortex (A1). The plasticity-enhancing and memory-enhancing effects of VNS follow an inverted-U response to stimulation intensity, in which moderate intensity currents yield greater effects than low or high intensity currents. It is not known how other stimulation parameters effect the plasticity-enhancing effects of VNS. OBJECTIVE: We sought to investigate the effect of pulse-width and intensity on VNS efficacy...
November 15, 2017: Brain Stimulation
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