Frequency Content of Unipolar Electrograms May Predict Deep Intramural Excitable Substrate Insights From Intramural Needle Catheter Ablation of Ventricular Tachycardia

摘要

OBJECTIVES This study sought to identify midmyocardial arrhythmogenic substrates by examining the frequency content of unipolar endocardial surface electrograms, comparing sites with transmural scar versus sites with intramural excitable substrate (IES) as identified during needle catheter ablation for ventricular tachycardia (VT).