Ablation of Epicardial Macroreentrant Ventricular Tachycardia Associated with Idiopathic Nonischemic Dilated Cardiomyopathy by a Percutaneous Transthoracic Approach

作者：Vijendra Swarup, Joseph B. Morton, Mauricio Arruda, David J. Wilber · 发表于：Journal of Cardiovascular Electrophysiology · 年份：2002 · DOI：10.1046/j.1540-8167.2002.01164.x · 被引用次数：55 · 研究领域：Cardiac Arrhythmias and Treatments、Cardiac pacing and defibrillation studies、Cardiac electrophysiology and arrhythmias

Characterization of the substrate and mechanism of epicardial ventricular tachycardia (VT) associated with idiopathic nonischemic dilated cardiomyopathy is limited. We report a case of successful mapping and ablation of an epicardial VT by a percutaneous transthoracic approach in a patient with idiopathic dilated cardiomyopathy, frequent VT, and previously unsuccessful endocardial ablation. Evidence of myocardial scar was limited to the epicardium. Electroanatomic and entrainment mapping defined a figure-of-eight macroreentrant circuit within the epicardial scar. VT terminated at the onset of low-power radiofrequency application to the central isthmus of the circuit. VT was no longer induced and did not recur during long-term follow-up.