Abstract Bundle branch reentrant (BBR) ventricular tachycardia (VT) is a macroreentrant VT with a well-defined reentry circuit, incorporating the right and left bundle branches as obligatory limbs of the circuit,…
Abstract Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common form of paroxysmal supraventricular tachycardia. The exact electroanatomic circuit responsible for AVNRT remains elusive. Current evidence suggests that dual atrioventricular…
Abstract Atrial fibrillation (AF) is the most common sustained arrhythmia encountered in clinical practice. AF is a progressive disease and is independently associated with significantly increased morbidity and mortality. The…
Abstract Idiopathic ventricular tachycardia (VT) comprises 10% of all patients referred for evaluation of VT. Diagnostic features of idiopathic VT include (1) structurally normal heart and (2) QRS morphology consistent…
Abstract Reported rates of major complications following contemporary catheter ablation procedures vary by as much as five- to eightfold between various types of ablation procedures, ranging from 0.8% for supraventricular…
Abstract Bypass tracts (BTs) are remnants of the atrioventricular (AV) concaused by incomplete embryological development of the AV annuli and failure of the fibrous separation between the atria and ventricles….
Abstract Arrhythmogenic right ventricular cardiomyopathy (ARVC), also referred to as “arrhythmogenic cardiomyopathy,” is an inherited desmosomal cardiomyopathy with incomplete penetrance and variable expressivity. ARVC is characterized by ventricular arrhythmias and…
Abstract Hypertrophic cardiomyopathy (HCM) is characterized by a thickened but nondilated left ventricle in the absence of any other cardiac or systemic condition capable of producing the magnitude of hypertrophy…
Abstract Ventricular tachycardia (VT) originating from the subepicardium is an important cause of failure of endocardial approaches to VT ablation. Mapping arrhythmia foci or circuits that are deep within the…
Abstract In general, patients with congenital heart disease (CHD) are prone to two forms of ventricular tachyarrhythmias: (1) macroreentrant monomorphic ventricular tachycardia (VT) related to scar or prosthetic materials used…
