Abstract
Catheter ablation is an important therapeutic option for controlling recurrent episodes of ventricular tachycardia (VT) in patients with structural heart disease.1 Mapping technologies have improved the ability to define areas of ventricular scar substrate for VT. Voltage maps and intracardiac ultrasound as well as preacquired cardiac magnetic resonance imaging or computed tomography have increased our understanding of the relation of cardiac anatomy and scars to ventricular reentry circuits. A substrate-guided approach, targeting the potential reentry circuit, facilitates the ablation of multiple and unstable VTs.
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