Jason T. Jacobson, MD, FHRS, of Westchester Med Center-New York Med College is joined by guests, David S. Frankel, MD, FHRS, of the Hospital of the University of Pennsylvania, and Usha B. Tedrow, MD, MS, FHRS, of Brigham and Women's Hospital, to discuss substrate mapping altering ventricular tachycardia inducibility. The authors performed a retrospective analysis of the reproducibility of programmed stimulation for the first induction of ventricular tachycardia in those with and without intervening voltage mapping. This was study was not randomized. All subjects had 2 rounds of programmed stimulation separated in time. One group underwent intracardiac echocardiographic mapping in between attempts while the other underwent substrate mapping. The authors found a change in the results of programed stimulation (to either a different VT, or to non-inducibility) more frequently after substrate mapping.

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Host Disclosure(s):

J. Jacobson: Honoraria/Speaking/Consulting Fee: American College of Cardiology, Zoll Medical Corporation; Research (Contracted Grants for PIs Named Investigators Only): Abbott, Phillips; Stocks (Privately Held): Atlas 5D

Contributor Disclosure(s):

D. Frankel: Honoraria/Speaking/Consulting Fee: Biosense Webster, Inc., Medtronic, Abbott Medical, Stryker, Boston Scientific

U. Tedrow: Honoraria/Speaking/Consulting Fee: Biosense Webster, Inc., St. Jude Medical, Thermedical, Medtronic, Boston Scientific, Baylis Medical Company