The fibrous skeleton is concentrated at the base of the ventricular mass. It provides electrical
insulation at the atrioventricular level and fibrous continuity for the leaflets of the mitral …

Radiofrequency ablation in the outflow tract and great arteries is increasingly performed to
treat a variety of symptomatic cardiac arrhythmias. The regional anatomy of these structures …

Abstract Background: Idiopathic ventricular arrhythmias (VAs) originating from the
pulmonary sinus cusp (PSC) have not been sufficiently clarified. Objectives: The goal of this …

BACKGROUND: Ventricular arrhythmias are known to originate from the aortic sinus of
Valsalva. OBJECTIVE: The purpose of this study was to identify the characteristics …

Introduction Certain outflow tract tachyarrhythmias require ablation above the semilunar
valves. Understanding of the regional anatomy of these arrhythmogenic sites is required to …

BACKGROUND: The characteristics of idiopathic ventricular tachycardias (VTs) or idiopathic
premature ventricular contractions (PVCs) arising from the pulmonary artery (PA) have not …

The establishment of radiofrequency catheter ablation techniques as the mainstay in the
treatment of tachycardia has renewed new interest in cardiac anatomy. The interventional …

The surface electrocardiogram (ECG) is a useful tool to help identify the sites of origin of
ventricular tachycardia (VT). Despite such limitations as chest wall deformity and metabolic …

Background Right ventricular outflow tract (RVOT) ventricular arrhythmias (VAs) may
originate from the pulmonary sinus cusps (PSCs) far more frequently than previously …

Purpose Idiopathic outflow tract ventricular arrhythmias are ventricular tachycardias or
premature ventricular contractions presumably not related to myocardial scar or disorders of …