title: [Ablation of premature ventricular contractions originating in the right ventricular outflow tract using non-contact mapping].
abstract: 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.
authors.affiliation: Unidad de Arritmias, Servicio de Cardiología, Hospital Universitario Virgen Macarena, Sevilla, España. erdiazin@gmail.com
authors.forename: Ernesto
authors.initials: E
authors.lastname: Díaz Infante
authors.forename: Rocío
authors.initials: R
authors.lastname: Cózar León
authors.forename: Isabel
authors.initials: I
authors.lastname: Borrego
authors.forename: Josefa
authors.initials: J
authors.lastname: Maldonado
authors.forename: Pilar
authors.initials: P
authors.lastname: Nieto
authors.forename: José María
authors.initials: JM
authors.lastname: Cruz Fernández
mesh_terms: D000318:Adrenergic beta-Agonists / Q000627:therapeutic use; D000328:Adult; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D017115:Catheter Ablation / Q000379:methods*; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac / Q000379:methods*; D005260:Female; D005471:Fluoroscopy; D006352:Heart Ventricles; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007545:Isoproterenol / Q000627:therapeutic use; D008297:Male; D008839:Microelectrodes; D008875:Middle Aged; D016896:Treatment Outcome; D018879:Ventricular Premature Complexes / Q000628:therapy*
chemical_list: D000318:Adrenergic beta-Agonists; D000889:Anti-Arrhythmia Agents; D007545:Isoproterenol