| Prevention and reversal of atrial fibrillation inducibility and autonomic remodeling by low-level vagosympathetic nerve stimulation. | |
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MedLine Citation:
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PMID: 21272747 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVES: We hypothesized that autonomic atrial remodeling can be reversed by low-level (LL) vagosympathetic nerve stimulation (VNS). BACKGROUND: Previously, we showed that VNS can be antiarrhythmogenic. METHODS: Thirty-three dogs were subjected to electrical stimulation (20 Hz) applied to both vagosympathetic trunks at voltages 10% to 50% below the threshold that slowed sinus rate or AV conduction. Group 1 (n = 7): Programmed stimulation (PS) was performed at baseline and during 6-h rapid atrial pacing (RAP). PS allowed determination of effective refractory period (ERP) and AF inducibility measured by window of vulnerability (WOV). LL-VNS was continuously applied from the 4th to 6th hours. Group 2 (n = 4): After baseline ERP and WOV determinations, 6-h concomitant RAP+LL-VNS was applied. Sustained AF was induced by injecting acetylcholine (ACh) 10 mM into the anterior right ganglionated plexus (Group 3, n = 10) or applying ACh 10 mM to right atrial appendage (Group 4, n = 9). RESULTS: Group 1: The ERP progressively shortened and the ΣWOV (sum of WOV from all tested sites) progressively increased (p < 0.05) during 3-h RAP then returned toward baseline during 3-h RAP+LL-VNS (p < 0.05). Group 2: 6-h concomitant RAP+LL-VNS did not induce any significant change in ERP and ΣWOV. Group 3 and Group 4: AF duration (AF-D) and cycle length (AF-CL) were markedly altered by 3-h LL-VNS (Group 3: baseline: AF-D = 389 ± 90 s, AF-CL = 45.1 ± 7.8 ms; LL-VNS: AF-D = 50 ± 15 s, AF-CL = 82.0 ± 13.7 ms [both p < 0.001]; Group 4: baseline: AF-D = 505 ± 162 s, AF-CL = 48.8 ± 6.6 ms; LL-VNS: AF-D = 71 ± 21 s, AF-CL = 101.3 ± 20.9 ms [both p < 0.001]). CONCLUSIONS: LL-VNS can prevent and reverse atrial remodeling induced by RAP as well as suppress AF induced by strong cholinergic stimulation. Inhibition of the intrinsic cardiac autonomic nervous system by LL-VNS may be responsible for these salutary results. |
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Authors:
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Xia Sheng; Benjamin J Scherlag; Lilei Yu; Shuyan Li; Reza Ali; Ying Zhang; Guosheng Fu; Hiroshi Nakagawa; Warren M Jackman; Ralph Lazzara; Sunny S Po |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the American College of Cardiology Volume: 57 ISSN: 1558-3597 ISO Abbreviation: J. Am. Coll. Cardiol. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8301365 Medline TA: J Am Coll Cardiol Country: United States |
Other Details:
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Languages: eng Pagination: 563-71 Citation Subset: AIM; IM |
Copyright Information:
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Copyright © 2011 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Sir Run Run Shaw Institution of Clinical Medicine and Department of Cardiology, Sir Run Run Shaw Hospital Affiliated to Medical College of Zhejiang University, Hangzhou, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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