Example of a successful ablation of idiopathic ventricular tachycardias originating from the anterior portion of the endocardial mitral annulus.

<p>(A) The surface ECG characteristic. (B) The local ventricular activation time recorded at the successful ablation site that preceded the onset of the QRS complex was 30 ms. (C) The fluoroscopic position of the ablation catheter site. (D) Termination of ventricular tachycardias during RF application at the site.