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Eur Heart J ; 31(4): 450-6, 2010 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19897495

RESUMO

AIMS: We investigated the feasibility of real-time magnetic resonance imaging (RTMRI) guided ablation of the cavotricuspid isthmus (CTI) by using a MRI-compatible ablation catheter. METHODS AND RESULTS: Cavotricuspid isthmus ablation was performed in an interventional RTMRI suite by using a novel 7 French, steerable, non-ferromagnetic ablation catheter in a porcine in vivo model (n = 20). The catheter was introduced and navigated by RTMRI visualization only. Catheter position and movement during manipulation were continuously visualized during the entire intervention. Two porcine prematurely died due to VT/VF. Anatomical completion of the CTI ablation line could be achieved after a mean of 6.3+/-3 RF pulses (RF energy: 1807+/-1016.4 Ws/RF pulse, temperature: 55.9+/-5.9 degrees C) in n = 18 animals. In 15 of 18 procedures (83.3%) a complete CTI block was proven by conventional mapping in the electrophysiological (EP) lab. CONCLUSION: Completely non-fluoroscopic ablation guided by RTMRI using a steerable and non-ferromagnetic catheter is a promising novel technology in interventional electrophysiology.


Assuntos
Flutter Atrial/cirurgia , Ablação por Cateter/métodos , Valva Tricúspide/cirurgia , Animais , Eletrofisiologia , Estudos de Viabilidade , Angiografia por Ressonância Magnética , Imagem por Ressonância Magnética Intervencionista , Suínos
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