Adenosine is an autacoid that plays a critical role in regulating cardiac function, including
heart rate, contractility, and coronary flow. In this chapter, current knowledge of the functions …

ablation of scar-related left ventricular (LV) tachycardias. The risk is likely greater in the thin-
walled right ventricle (RV) and with power 40 W. External irrigation has been suggested to …

Catheter ablation is now an important option to control recurrent ventricular tachycardias
(VTs). The field has evolved rapidly and is a work in progress. Ablation is often a sole …

Idiopathic Ventricular Arrhythmias and Cardiomyopathy. Introduction: Idiopathic ventricular
arrhythmias in the form of monomorphic premature ventricular contractions (PVC) and/or …

Ventricular arrhythmia (VA) in structurally normal hearts can be broadly considered under
non–life-threatening monomorphic and life-threatening polymorphic rhythms. Monomorphic …

Background—Several distinct forms of focal ventricular tachycardia (VT) from the left
ventricle (LV) have been described. We report a new syndrome of VT arising from the base …

Idiopathic ventricular arrhythmia is a generic term for a spectrum of arrhythmias that occur in
the absence of structural heart disease or ion channelopathy. These arrhythmias include …

This document was reviewed by the PACES executive committee and through the HRS
review process. All writing members approved the final version. The writing committee …

Background: A subgroup of outflow tract (OT) ventricular tachycardias (VT) originate from the
aortic sinuses or the main stem of the pulmonary artery. The anatomic substrate for these …

BACKGROUND: The most common site of origin of idiopathic ventricular tachycardia (VT) is
the right ventricular outflow tract. Idiopathic VT also can arise from the left ventricular outflow …