Key result
Percutaneous epicardial RF ablation linked to fewer VT episodes without major in-hospital complications.
Why the study?
Does percutaneous epicardial radiofrequency ablation reduce ventricular tachycardia episodes in patients with VT?
Observational (n=9)
Does percutaneous epicardial radiofrequency ablation reduce ventricular tachycardia episodes in patients with VT?
Percutaneous epicardial ablation is a safe and effective approach for reducing ventricular tachycardia episodes in selected patients.
Supports epicardial ablation in refractory VT; hypothesis-generating and requires prospective validation before broader adoption.
Reentrant circuits of ventricular tachycardia may involve not only the endocardium but also the epicardium. Epicardial ablation can be useful in these situations. The aim of this study was to assess efficacy, safety and complications in a series of consecutive patients who underwent ablation of ventricular tachycardia with epicardial mapping. The study included all patients undergoing ventricular tachycardia ablation with epicardial mapping from 2004 to 2012. Of a total of 95 ablations, an epicardial approach was attempted in nine patients, eight male, mean age 58±12 years. Endocardial mapping was performed in all patients previously or simultaneously. The etiology of the arrhythmia was non-ischemic in eight patients and ischemic in one. We compared the number of events in the six months prior to the epicardial procedure and six months after. Percutaneous epicardial access was achieved in eight patients. In one case it was not possible due to the presence of adhesions. In none of the patients was the procedure repeated and there were no major complications during hospitalization. In a mean follow-up of 3.5±1.2 years, one patient suffered stroke; there were no other medium-to-long-term complications and the number of ventricular tachycardia episodes was reduced in all patients after ablation. Epicardial radiofrequency ablation of ventricular tachycardia was effective in reducing morbidity in eight patients, with a low risk of complications in the short and medium-to-long term. Os circuitos de reentrada da taquicardia ventricular envolvem, por vezes, não só o endocárdio, mas também o epicárdio. A ablação de taquicardia ventricular por via epicárdica pode ser útil nessas situações. O objetivo do estudo consistiu em avaliar a eficácia, segurança e complicações de uma série doentes consecutivos submetidos a ablação de arritmias ventriculares com mapeamento por via epicárdica. Foram incluídos no estudo todos os doentes submetidos a ablação de taquicardia ventricular com mapeamento por via epicárdica desde 2004 até 2012. De um total de 95 ablações, em nove doentes foi tentada a via epicárdica, oito do sexo masculino com 58 ± 12 anos. Todos os doentes tinham sido previamente submetidos ou realizaram concomitantemente mapeamento endocárdico. A etiologia da arritmia era não isquémica em oito doentes e isquémica num. Comparou-se o número de eventos nos seis meses anteriores ao procedimento epicárdico com os seis meses seguintes. O acesso epicárdico foi conseguido em oito doentes por via percutânea subxifoideia. Num caso não foi possível abordagem epicárdica por presença de aderências. Em nenhum dos doentes o procedimento foi repetido e não se verificaram complicações major no período intra-hospitalar. Num seguimento médio de 3,5 ± 1,2 anos registou-se um acidente vascular cerebral num doente, não se registando outras complicações a médio/longo prazo, tendo a maioria dos doentes diminuído o número de episódios de taquicardia ventricular após ablação. A ablação de taquicardia ventricular por via epicárdica foi utilizada eficazmente na diminuição da morbilidade em oito doentes com baixo risco de complicações a médio/longo prazo.
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Santos et al. (2014) conducted an observational in Ventricular tachycardia (n=9). Percutaneous epicardial radiofrequency ablation vs. Pre-procedure baseline (6 months prior) was evaluated on Efficacy (number of ventricular tachycardia episodes), safety, and complications. Percutaneous epicardial radiofrequency ablation of ventricular tachycardia reduced the number of VT episodes in all 8 successfully treated patients, with no major intra-hospital complications.
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