Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/346323
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampViana, Marcelo de Almeida-
dc.contributor.authorunicampBassani, Rosana Almada-
dc.contributor.authorunicampPetrucci Junior, Orlando-
dc.contributor.authorunicampMarques, Denilson Antônio-
dc.contributor.authorunicampBassani, José Wilson Magalhães-
dc.typeArtigopt_BR
dc.titleSystem for open-chest, multidirectional electrical defibrillationpt_BR
dc.contributor.authorViana, Marcelo Almeida-
dc.contributor.authorBassani. Rosana Almada-
dc.contributor.authorPetrucci, Orlando-
dc.contributor.authorMarques, Denilson Antônio-
dc.contributor.authorBassani, José Wilson Magalhães-
dc.subjectArritmias cardíacaspt_BR
dc.subjectFibrilação ventricularpt_BR
dc.subjectDesfibriladorespt_BR
dc.subject.otherlanguageArrhythmias, Cardiacpt_BR
dc.subject.otherlanguageVentricular Fibrillationpt_BR
dc.subject.otherlanguageDefibrillatorspt_BR
dc.description.abstractCardiomyocytes are more sensitive to stimulatory electrical fields when the latter are applied longitudinally to the cell major axis. In the whole heart, cells have different spatial orientations, which may limit the effectiveness of conventional electrical defibrillation (i.e., shock delivery in a single direction). This article describes the constructive aspects of a portable system for rapidly-switching, multidirectional stimulus delivery, composed of an electrical defibrillator and multielectrode-bearing paddles for direct cardiac defibrillation. Methods: The defibrillator delivers monophasic, truncated monoexponential waveforms with energy up to 7.3 J. Upon selection of the defibrillation modality (unidirectional or multidirectional), shock delivery is triggered through 1 or 3 outputs. In the latter case, triggering is sequentially switched to the outputs, without interval or temporal overlap. Each paddle contains 3 electrodes that define shock pathways spaced by 60°. The system was tested in vivo for reversal of experimentally-induced ventricular fibrillation in healthy swine, using 30- and 20-ms long shocks (N= 4 in each group). Results: The defibrillator delivers identical stimulus waveforms through all outputs in both stimulation modalities. In all animals, successful defibrillation required lower shock energy when 20 ms-long stimuli were applied in 3 directions, compared to a single direction. However, performance was poorer with multidirectional defibrillation for 30 ms-long shocks. Conclusion: The delivery of identical shock waveforms allowed confirmation that multidirectional defibrillation can promote restoration of sinus rhythm with lower shock energy, which may reduce myocardial electrical damage during defibrillation. Nevertheless, increase in shock duration greatly impairs the effectiveness of this defibrillation modalitypt_BR
dc.relation.ispartofResearch on biomedical engineeringpt_BR
dc.relation.ispartofabbreviationRes. biomed. eng.pt_BR
dc.publisher.cityRio de Janeiro, RJpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisherSociedade Brasileira de Engenharia Biomédicapt_BR
dc.date.issued2016-
dc.date.monthofcirculationjan./mar.pt_BR
dc.language.isoengpt_BR
dc.description.volume32pt_BR
dc.description.issuenumber1pt_BR
dc.description.firstpage74pt_BR
dc.description.lastpage84pt_BR
dc.rightsAbertopt_BR
dc.sourceSCIELOpt_BR
dc.identifier.issn2446-4732pt_BR
dc.identifier.eissn2446-4740pt_BR
dc.identifier.doi10.1590/2446-4740.02015pt_BR
dc.identifier.urlhttps://www.scielo.br/scielo.php?script=sci_arttext&pid=S2446-47402016000100074pt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsordocumentnumber302996/2011-7; 135204/2008-9pt_BR
dc.date.available2020-07-29T17:15:46Z-
dc.date.accessioned2020-07-29T17:15:46Z-
dc.description.provenanceSubmitted by Mariana Aparecida Azevedo (mary1@unicamp.br) on 2020-07-29T17:15:46Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-01-08T19:02:38Z : No. of bitstreams: 1 S2446-47402016000100074.pdf: 3057865 bytes, checksum: a7b0418d157a98317545250493f21431 (MD5)en
dc.description.provenanceMade available in DSpace on 2020-07-29T17:15:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2016en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/346323-
dc.contributor.departmentsem informaçãopt_BR
dc.contributor.departmentsem informaçãopt_BR
dc.contributor.departmentDepartamento de Cirurgiapt_BR
dc.contributor.departmentsem informaçãopt_BR
dc.contributor.departmentDepartamento de Engenharia Biomédicapt_BR
dc.contributor.unidadeFaculdade de Engenharia Elétrica e de Computaçãopt_BR
dc.contributor.unidadeCentro de Engenharia Biomédicapt_BR
dc.contributor.unidadeFaculdade de Ciências Médicaspt_BR
dc.contributor.unidadeFaculdade de Engenharia Elétrica e de Computaçãopt_BR
dc.contributor.unidadeFaculdade de Engenharia Elétrica e de Computaçãopt_BR
dc.subject.keywordShock durationpt_BR
dc.identifier.sourceS2446-47402016000100074pt_BR
dc.creator.orcid0000-0002-6673-8708pt_BR
dc.creator.orcid0000-0002-6453-1359pt_BR
dc.creator.orcidsem informaçãopt_BR
dc.creator.orcidsem informaçãopt_BR
dc.creator.orcid0000-0003-4202-6420pt_BR
dc.type.formArtigo originalpt_BR
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FEEC - Artigos e Outros Documentos
CEB - Artigos e Outros Documentos

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