Cited 46 times in
Optical Mapping of Ventricular Defibrillation in Isolated Swine Right Ventricles Demonstration of a Postshock Isoelectric Window After Near-Threshold
DC Field | Value | Language |
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dc.contributor.author | 이문형 | - |
dc.date.accessioned | 2016-02-19T11:24:10Z | - |
dc.date.available | 2016-02-19T11:24:10Z | - |
dc.date.issued | 2001 | - |
dc.identifier.issn | 0009-7322 | - |
dc.identifier.uri | https://ir.ymlib.yonsei.ac.kr/handle/22282913/143066 | - |
dc.description.abstract | BACKGROUND: Investigators who studied ventricular defibrillation by use of optical mapping techniques failed to observe an initial defibrillation event (isoelectric window or quiescent period) shown by electrode mapping studies. This discrepancy has important implications for the mechanisms of defibrillation. The purpose of the present study was to demonstrate an optical equivalent of an isoelectric window after a near-threshold defibrillation shock. Methods and Results-- We studied 10 isolated, perfused swine right ventricles. Upper limit of vulnerability was determined by shocks on T waves. A 50% probability of successful defibrillation (DFT50) was determined with an up-down algorithm. Immediately after unsuccessful defibrillation shock, new wavefronts were generated. When the shock strength was low, immediate reinitiation of reentry and ventricular fibrillation might occur without a postshock isoelectric window. However, if the shock strength was within 50 V of DFT50 (near-threshold), a synchronized activation occurred, followed by organized repolarization that ended 64+/-18 ms after shock. After a period of quiescence (18+/-24 ms), activation recurred 83+/-33 ms after shock and reinitiated ventricular fibrillation. Similar patterns of activation, including a quiescent period, were observed after shock was applied on the T wave of the paced beat that induced ventricular fibrillation. Upper limit of vulnerability correlated well with DFT50. CONCLUSIONS: In isolated swine right ventricles, an optical equivalent of an isoelectric window exists after near-threshold defibrillation shocks. These findings support the idea that a near-threshold defibrillation shock terminates all activation wavefronts but fails to halt ventricular fibrillation because the same shock reinitiates ventricular fibrillation after an isoelectric window. | - |
dc.description.statementOfResponsibility | open | - |
dc.format.extent | 227~233 | - |
dc.relation.isPartOf | CIRCULATION | - |
dc.rights | CC BY-NC-ND 2.0 KR | - |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/2.0/kr/ | - |
dc.subject.MESH | Action Potentials | - |
dc.subject.MESH | Animals | - |
dc.subject.MESH | Body Surface Potential Mapping | - |
dc.subject.MESH | Electric Countershock/methods* | - |
dc.subject.MESH | Electrophysiologic Techniques, Cardiac/instrumentation | - |
dc.subject.MESH | Electrophysiologic Techniques, Cardiac/methods* | - |
dc.subject.MESH | Female | - |
dc.subject.MESH | In Vitro Techniques | - |
dc.subject.MESH | Male | - |
dc.subject.MESH | Reaction Time* | - |
dc.subject.MESH | Sensory Thresholds | - |
dc.subject.MESH | Signal Processing, Computer-Assisted | - |
dc.subject.MESH | Swine | - |
dc.subject.MESH | Ventricular Dysfunction, Right/complications | - |
dc.subject.MESH | Ventricular Dysfunction, Right/physiopathology* | - |
dc.subject.MESH | Ventricular Fibrillation/complications | - |
dc.subject.MESH | Ventricular Fibrillation/physiopathology* | - |
dc.title | Optical Mapping of Ventricular Defibrillation in Isolated Swine Right Ventricles Demonstration of a Postshock Isoelectric Window After Near-Threshold | - |
dc.type | Article | - |
dc.contributor.college | College of Medicine (의과대학) | - |
dc.contributor.department | Dept. of Internal Medicine (내과학) | - |
dc.contributor.googleauthor | Nina C. Wang | - |
dc.contributor.googleauthor | Moon-Hyoung Lee | - |
dc.contributor.googleauthor | Toshihiko Ohara | - |
dc.contributor.googleauthor | Yuji Okuyama | - |
dc.contributor.googleauthor | Gregory A. Fishbein | - |
dc.contributor.googleauthor | Shien-Fong Lin | - |
dc.contributor.googleauthor | Hrayr S. Karagueuzian | - |
dc.contributor.googleauthor | Peng-Sheng Chen | - |
dc.identifier.doi | 10.1161/01.CIR.104.2.227 | - |
dc.admin.author | false | - |
dc.admin.mapping | false | - |
dc.contributor.localId | A02766 | - |
dc.relation.journalcode | J00533 | - |
dc.identifier.eissn | 1524-4539 | - |
dc.identifier.pmid | 11447091 | - |
dc.subject.keyword | action potentials | - |
dc.subject.keyword | mapping | - |
dc.subject.keyword | electrical stimulation | - |
dc.subject.keyword | electrophysiology | - |
dc.subject.keyword | death, sudden | - |
dc.contributor.alternativeName | Lee, Moon Hyoung | - |
dc.contributor.affiliatedAuthor | Lee, Moon Hyoung | - |
dc.rights.accessRights | free | - |
dc.citation.volume | 104 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 227 | - |
dc.citation.endPage | 233 | - |
dc.identifier.bibliographicCitation | CIRCULATION, Vol.104(2) : 227-233, 2001 | - |
dc.identifier.rimsid | 38994 | - |
dc.type.rims | ART | - |
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