scholarly journals Visualization of Complex Processes in Cardiovascular System during Electrical Auricular Vagus Nerve Stimulation

Diagnostics ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2190
Author(s):  
Vaiva Šiaučiūnaitė ◽  
Minvydas Ragulskis ◽  
Alfonsas Vainoras ◽  
Babak Dabiri ◽  
Eugenijus Kaniusas
Keyword(s):  
Vagus Nerve ◽  
Cardiovascular System ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Point Of View ◽  
Computational Techniques ◽  
Mathematical Methods ◽  
Complex Systems Theory ◽  
Complex Processes ◽  
The Matrix

The analysis of human physiological systems from the point of view of complex systems theory remains a very ambitious task. The complexity of the problem often encourages the use of innovative mathematical methods analyzing the processes that take place in space and time. The main goal of this paper is to visualize the cardiovascular system during auricular vagus nerve stimulation (aVNS) using the matrix differences to evaluate the dynamic signal interfaces by cointegrating the initial signal data into the matrices during each case. Algebraic relationships between RR/JT and JT/QRS cardiac intervals are used not only to track the cardiovascular changes during aVNS but also to characterize individual features of the person during the transit through the therapy. This paper presents the computational techniques that can visualize the complex dynamical processes taking place in the cardiovascular system using the electrical aVNS therapy. Four healthy volunteers participated in two verum and two placebo experiments. We discovered that the body’s reaction to the stimulation was very different in each of the cases, but the presented techniques opened new possibilities for a novel interpretation of the dynamics of the cardiovascular system.

scholarly journals Vagus Nerve Stimulation and the Cardiovascular System

2019 ◽  
Vol 10 (2) ◽  
pp. a034173 ◽  
Author(s):  
Michael J. Capilupi ◽  
Samantha M. Kerath ◽  
Lance B. Becker
Keyword(s):  
Vagus Nerve ◽  
Cardiovascular System ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation

Effect of Transcutaneous Vagus Nerve Stimulation in Dysphagia After Lateral Medullary Infarction: A Case Report

2019 ◽  
Vol 28 (4) ◽  
pp. 1381-1387
Author(s):  
Ying Yuan ◽  
Jie Wang ◽  
Dongyu Wu ◽  
Dahua Zhang ◽  
Weiqun Song
Keyword(s):  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Rating Scale ◽  
Tube Feeding ◽  
Nasogastric Feeding ◽  
Lateral Medullary Infarction ◽  
Severe Dysphagia ◽  
Transcutaneous Vagus Nerve Stimulation ◽  
Medullary Infarction

Purpose Severe dysphagia with weak pharyngeal peristalsis after dorsal lateral medullary infarction (LMI) requires long-term tube feeding. However, no study is currently available on therapeutic effectiveness in severe dysphagia caused by nuclear damage of vagus nerve after dorsal LMI. The purpose of the present investigation was to explore the potential of transcutaneous vagus nerve stimulation (tVNS) to improve severe dysphagia with weak pharyngeal peristalsis after dorsal LMI. Method We assessed the efficacy of 6-week tVNS in a 28-year-old woman presented with persisting severe dysphagia after dorsal LMI who had been on nasogastric feeding for 6 months. tVNS was applied for 20 min twice a day, 5 days a week, for 6 weeks. The outcome measures included saliva spitted, Swallow Function Scoring System, Functional Oral Intake Scale, Clinical Assessment of Dysphagia With Wallenberg Syndrome, Yale Pharyngeal Residue Severity Rating Scale, and upper esophagus X-ray examination. Results After tVNS, the patient was advanced to a full oral diet without head rotation or spitting. No saliva residue was found in the valleculae and pyriform sinuses. Contrast medium freely passed through the upper esophageal sphincter. Conclusion Our findings suggest that tVNS might provide a useful means for recovery of severe dysphagia with weak pharyngeal peristalsis after dorsal LMI. Supplemental Material https://doi.org/10.23641/asha.9755438

Vagus nerve stimulation in rheumatoid arthritis – Authors' reply

2021 ◽  
Vol 3 (1) ◽  
pp. e14-e15
Author(s):  
Mark C Genovese ◽  
Yaakov A Levine ◽  
David Chernoff
Keyword(s):  
Rheumatoid Arthritis ◽  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation

Cognition-enhancing effect of vagus nerve stimulation on refractory epilepsy secondary to lissencephaly: A case report.

2018 ◽  
Vol 11 (1) ◽  
pp. 80-85
Author(s):  
Rodrigo Marmo da Costa e Souza ◽  
Felipe Ricardo Pereira Vasconcelos De Arruda ◽  
Jose Anderson Galdino Santos ◽  
Jamerson De Carvalho Andrade ◽  
Suellen Mary Marinho Dos Santos Andrade ◽  
...  
Keyword(s):  
Case Report ◽  
Vagus Nerve ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Refractory Epilepsy ◽  
Enhancing Effect

Implanted vagus nerve stimulation in 126 patients: surgical technique and complications

2020 ◽  
Vol 99 (7) ◽  
Keyword(s):  
Vagus Nerve ◽  
Vocal Cord ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Pulse Generator ◽  
Operative Procedure ◽  
Intractable Epilepsy ◽  
Vagal Nerve ◽  
University Hospital ◽  
Nerve Stimulator

Introduction: Vagus nerve stimulation is a palliative treatment for patients with refractory epilepsy to reduce the frequency and intensity of seizures. A bipolar helical electrode is placed around the left vagus nerve at the cervical level and is connected to the pulse generator placed in a subcutaneous pocket, most commonly in the subclavian region. Methods: Between March 1998 and October 2019, we performed 196 procedures related to the vagal nerve stimulation at the Neurosurgery Department in Motol University Hospital. Of these, 126 patients were vagal nerve stimulator implantation surgeries for intractable epilepsy. The cases included 69 female and 57 male patients with mean age at the time of the implantation surgery 22±12.4 years (range 2.1−58.4 years). Results: Nine patients (7.1%) were afflicted by complications related to implantation. Surgical complications included postoperative infection in 1.6%, VNS-associated arrhythmias in 1.6%, jugular vein bleeding in 0.8% and vocal cord paresis in 2.4%. One patient with vocal cord palsy also suffered from severe dysphagia. One patient (0.8%) did not tolerate extra stimulation with magnet due to a prolonged spasm in his throat. The extra added benefit of vagus stimulation in one patient was a significant reduction of previously regular severe headaches. Conclusion: Vagus nerve stimulation is an appropriate treatment for patients with drug-resistant epilepsy who are not candidates for focal resective surgery. Implantation of the vagus nerve stimulator is a relatively safe operative procedure.

Vagus Nerve Stimulation Induced Synchrony Modulation of Local Field Potential in the Rat Cerebral Cortex

2013 ◽  
Vol 133 (8) ◽  
pp. 1493-1500 ◽  
Author(s):  
Ryuji Kano ◽  
Kenichi Usami ◽  
Takahiro Noda ◽  
Tomoyo I. Shiramatsu ◽  
Ryohei Kanzaki ◽  
...  
Keyword(s):  
Cerebral Cortex ◽  
Vagus Nerve ◽  
Local Field ◽  
Nerve Stimulation ◽  
Local Field Potential ◽  
Vagus Nerve Stimulation ◽  
Field Potential ◽  
Rat Cerebral Cortex
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