Effectiveness of epicardial atrial pacing using a bipolar steroid-eluting endocardial lead with active fixation in an experimental model
Acta cir. bras
; 28(7): 543-550, July 2013. ilus, graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-679088
Biblioteca responsável:
BR1.1
ABSTRACT
PURPOSE:
To assess the effectiveness of bipolar epicardial atrial pacing using an active fixation bipolar endocardial lead implanted on the atrial surface in an experimental model.METHODS:
A total of ten Large White adult pigs underwent pacemaker implantation under general anesthesia. Atrial pacing and sensing parameters were obtained at the procedure, immediate postoperative period and on the 7th and the 30th postoperative in unipolar and bipolar configurations.RESULTS:
All procedures were successfully performed. There were no perioperative complications and no early deaths. Atrial pacing and sensing parameters for both unipolar and bipolar modes remained stable throughout the study. We observed a progressive increase in atrial thresholds, ranging from 0.49 ± 0.35 (at implantation) to 1.86 ± 1.31 volts (30th postoperative day), in unipolar mode. Atrial impedance measurements decreased slightly over time, ranging from 486.80 ± 126.35 Ohms (at implantation) to 385.0 ± 80.52 Ohms (30th postoperative day). Atrial sensing measures remained stable from the immediate postoperative period until the end of the study.CONCLUSION:
The bipolar active fixation endocardial lead implanted epicardially can provide stable conditions of pacing and sensing parameters throughout the postoperative follow-up.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Marca-Passo Artificial
/
Esteroides
/
Estimulação Cardíaca Artificial
/
Eletrodos Implantados
/
Desenho de Equipamento
/
Átrios do Coração
Tipo de estudo:
Estudo de avaliação
/
Estudo prognóstico
Limite:
Animais
Idioma:
Inglês
Revista:
Acta cir. bras
Assunto da revista:
CIRURGIA GERAL
/
Procedimentos Cir£rgicos Operat¢rios
Ano de publicação:
2013
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
USP/BR