Repositório Digital

A- A A+

A resposta ventricular evocada nos pacientes com miocardiopatia hipertrofica obstrutiva tratada por marcapasso DDD

.

A resposta ventricular evocada nos pacientes com miocardiopatia hipertrofica obstrutiva tratada por marcapasso DDD

Mostrar registro completo

Estatísticas

Título A resposta ventricular evocada nos pacientes com miocardiopatia hipertrofica obstrutiva tratada por marcapasso DDD
Outro título Ventricular evoked response in patients with hypertrophic obstructive cardiomyopathy treated with DDD pacing
Autor Sant'Anna, João Ricardo Michielin
Prati, Raquel
Hutten, Helmut
Schreier, Gunter
Kastner, Peter
Kalil, Renato Abdala Karam
Prates, Paulo Roberto Lunardi
Castro, Iran
Azambuja, Paulo C.
Faes, Farid Cézar
Nesralla, Ivo Abrahao
Schaldach, Max
Abstract Objective - 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.
Contido em Arquivos Brasileiros de Cardiologia. Sao Paulo. vol. 73, n. 2 (aug. 1999), p. 169-174
Assunto Cardiomiopatia hipertrófica
Marca-passo artificial
[en] DDD pacing intracardiac electrogram
[en] Obstructive hypertrophic cardiomyopathy
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/19313
Arquivos Descrição Formato
000249973.pdf (200.2Kb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.