Ablation of Premature Ventricular Contractions Originating in the Right Ventricular Outflow Tract Using Non-Contact Mapping

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• 作者：Ernesto  ; Dí ; az Infante  ; ;   ; ^{erdiazin@gmail.com} ; Rocí ; o  ; Có ; zar Leó ; n ; Isabel  ; Borrego ; Josefa  ; Maldonado ; Pilar  ; Nieto ; José ; Marí ; a  ; Cruz Ferná ; ndez
• 关键词：Catheter ablation ; Mapping ; Radiofrequency ; Tachyarrhythmias
• 刊名：Revista Española de Cardiología (English Edition)
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：64
• 期：12
• 页码：1198-1201
• 全文大小：582 K

文摘

Premature ventricular contractions originating in the right ventricular outflow tract may respond poorly to pharmacological treatment, and ablation using conventional fluoroscopically-guided systems may be complicated by the difficulty in inducing arrhythmias. We describe the use of a non-contact mapping system to ablate difficult-to-induce premature ventricular contractions originating in the right ventricular outflow tract. Five premature ventricular contractions sites in the right ventricular outflow tract were ablated in a prospective series of 4 patients. Patients had a poor quality of life and had not responded to antiarrhythmic drugs. A mean of 3 radiofrequency pulses per site was applied and mean application time was 113 ¡À 15 s. We achieved a 100 % acute success rate and there were no complications. Patients were asymptomatic without drug therapy after a mean of 30 ¡À 16 months of follow-up. The noncontact mapping system is highly effective in eliminating difficult to induce, isolated premature ventricular contractions.