Abstract The majority of sudden cardiac death (SCD) events are associated with structural heart disease; however, in 10% to 20% of SCDs, no cardiac structural abnormalities are detectable. The lack…
Abstract Coronary heart disease is the most common cause of clinically documented ventricular tachycardia (VT). The majority of sustained monomorphic VTs in patients with prior myocardial infarction (MI) are caused…
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…
