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dc.contributor.authorSant'Anna, João Ricardo Michielinpt_BR
dc.contributor.authorPrati, Raquelpt_BR
dc.contributor.authorHutten, Helmutpt_BR
dc.contributor.authorSchreier, Gunterpt_BR
dc.contributor.authorKastner, Peterpt_BR
dc.contributor.authorKalil, Renato Abdala Karampt_BR
dc.contributor.authorPrates, Paulo Roberto Lunardipt_BR
dc.contributor.authorCastro, Iranpt_BR
dc.contributor.authorAzambuja, Paulo C.pt_BR
dc.contributor.authorFaes, Farid Cézarpt_BR
dc.contributor.authorNesralla, Ivo Abrahaopt_BR
dc.contributor.authorSchaldach, Maxpt_BR
dc.date.accessioned2010-04-16T09:09:12Zpt_BR
dc.date.issued1999pt_BR
dc.identifier.issn0066-782Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/19313pt_BR
dc.description.abstractObjective - To assess the changes in ventricular evoked responses (VER) produced by the decrease in left ventricular outflow tract gradient (LVOTG) in patients with hypertrophic obstructive cardiomyopathy (HOCM) treated with dual-chamber (DDD) pacing. Methods - A pulse generator Physios CTM (Biotronik, Germany) was implanted in 9 patients with severe drug-refractory HOCM. After implantation, the following conditions were assessed: 1) Baseline evaluation: different AV delay (ranging from 150ms to 50 ms) were sequentially programmed during 5 to 10 minutes, and the LVOTG (as determined by Doppler echocardiography) and VER recorded; 2) standard evaluation, when the best AV delay (resulting in the lowest LVOTG) programmed at the initial evaluation was maintained so that its effect on VER and LVOTG could be assessed during each chronic pacing evaluation. Results - LVOTG decreased after DDD pacing, with a mean value of 59 ± 24 mmHg after dual chamber pacemaker, which was significantly less than the gradient before pacing (98 + 22mmHg). An AV delay >100ms produced a significantly lower decrease in VER depolarization duration (VERDD) when compared to an AV delay £100ms. Linear regression analyses showed a significant correlation between the LVOTG values and the magnitude of VER (r=0.69; p<0.05) in the 9 studied patients. Conclusion - The telemetry obtained intramyocardial electrogram is a sensitive means to assess left ventricular dynamics in patients with HOCM treated with DDD pacing.en
dc.format.mimetypeapplication/pdf
dc.language.isoporpt_BR
dc.relation.ispartofArquivos Brasileiros de Cardiologia. Sao Paulo. vol. 73, n. 2 (aug. 1999), p. 169-174pt_BR
dc.rightsOpen Accessen
dc.subjectCardiomiopatia hipertróficapt_BR
dc.subjectObstructive hypertrophic cardiomyopathyen
dc.subjectDDD pacing intracardiac electrogramen
dc.subjectMarca-passo artificialpt_BR
dc.titleA resposta ventricular evocada nos pacientes com miocardiopatia hipertrofica obstrutiva tratada por marcapasso DDDpt_BR
dc.title.alternativeVentricular evoked response in patients with hypertrophic obstructive cardiomyopathy treated with DDD pacing en
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000249973pt_BR
dc.type.originNacionalpt_BR


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