Improving Substrate Mapping for Ventricular Tachycardia with a Novel Peak Frequency Annotation Algorithm: Deconstructing the Abnormal Electrogram
Catheter ablation of ventricular tachycardia (VT) is an important therapy to reduce morbidity associated with both infarct-related and non-ischemic cardiomyopathies1-4. Although activation and entrainment mapping of VT allow detailed assessment of the VT circuit and optimal locations for ablation, in many cases VTs are non-inducible, not sustained, or not hemodynamically tolerated. Studies utilizing hemodynamic support to allow mapping during sustained VT have not shown a clear benefit to this approach5.