title: Radiofrequency catheter ablation guided by noncontact mapping of ventricular tachycardia originating from an idiopathic left ventricular aneurysm.
abstract: Idiopathic left ventricular aneurysm and diverticulum is known to be an arrhythmogenic substrate associated to ventricular tachyarrhythmias, generally based on a reentry mechanism. A case of a young woman affected by a monomorphic ventricular tachycardia, refractory to medical treatment, originating from an aneurysm of the membranous interventricular septum is reported. The left ventricular aneurysm was well characterized by multislice computed tomography and left ventricular angiography. Because of the nonsustained and poorly tolerated nature of the target arrhythmia, a noncontact mapping system was used to guide radiofrequency catheter ablation, allowing the elaboration of a three-dimensional activation map of the left ventricle on the basis of a ventricular tachycardia single beat. The procedure was acutely successful, and the patient remained free of ventricular tachycardia recurrences without antiarrhythmic drugs during a subsequent 6-month follow-up period. This is the first report of a successful radiofrequency catheter ablation guided by noncontact mapping system of a ventricular tachycardia originating from an idiopathic left ventricular aneurysm. This nonfluoroscopic mapping method allows a reliable reconstruction of the spatial relationships between the left ventricular main cavity and the aneurysm and can be safely and effectively used to map the ventricular tachycardia and guide the ablation procedure, particularly when conventional mapping is not indicated or not effective because of nonsustained or not-tolerated characters of ventricular tachycardia.
authors.affiliation: Cardiovascular Department, Catholic University of the Sacred Heart, Largo A. Gemelli 1, 86100 Campobasso, Italy. matteosantamaria@yahoo.it
authors.forename: Matteo
authors.initials: M
authors.lastname: Santamaria
authors.forename: Manuela
authors.initials: M
authors.lastname: Cireddu
authors.forename: Stefania
authors.initials: S
authors.lastname: Riva
authors.forename: Nicola
authors.initials: N
authors.lastname: Trevisi
authors.forename: Paolo
authors.initials: P
authors.lastname: Della Bella
mesh_terms: D000328:Adult; D006328:Cardiac Catheterization; D017115:Catheter Ablation; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006322:Heart Aneurysm / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*