ABSTRACT
La extrasistolia ventricular originada en el tracto de salida de ventrículo derecho puede tener una respuesta pobre a fármacos y ser compleja de ablacionar mediante un sistema convencional con guía fluoroscópica debido a la dificultad en la inducibilidad. Describimos la ablación de extrasistolia ventricular de difícil inducibilidad originada en el tracto de salida de ventrículo derecho, mediante un sistema de cartografía sin contacto. Se realizó ablación de cinco focos extrasistólicos originados en tracto de salida de ventrículo derecho en una serie prospectiva de 4 pacientes. Los pacientes presentaban pobre calidad de vida y falta de respuesta a antiarrítmicos. Se realizó una media de tres aplicaciones de radiofrecuencia por foco, con un tiempo medio de aplicación de 113±15 s. Se obtuvo un 100% de éxito agudo y no hubo complicaciones. En un seguimiento medio de 30±16 meses, los pacientes se mantienen asintomáticos sin tratamiento farmacológico. El sistema de cartografía sin contacto permite una alta eficacia en la eliminación de extrasistolias ventriculares aisladas de difícil inducibilidad (AU)
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±15s. We achieved a 100% acute success rate and there were no complications. Patients were asymptomatic without drug therapy after a mean of 30±16 months of follow-up. The noncontact mapping system is highly effective in eliminating difficult to induce, isolated premature ventricular contractions (AU)
Subject(s)
Humans , Male , Female , /methods , Tachycardia/diagnosis , Fluoroscopy/methods , Fluoroscopy , Cardiac Electrophysiology/methods , Cardiac Electrophysiology/trends , /instrumentation , /trends , Tachycardia/physiopathology , Tachycardia , Prospective Studies , Cardiac Electrophysiology/instrumentationABSTRACT
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±15s. We achieved a 100% acute success rate and there were no complications. Patients were asymptomatic without drug therapy after a mean of 30±16 months of follow-up. The noncontact mapping system is highly effective in eliminating difficult to induce, isolated premature ventricular contractions.
