Limitations
This is a single center observational study with the inherent
limmitations to this study design and using the specific strategy
described so the results can not be extrapolated to other VT ablation
protocols. Further randomized studies comparing substrate ablation vs.
baseline VT induction + activation mapping when possible + critical
isthmus substrate ablation should be encouraged to definitively
elucidate the role of baseline VT inducibility and activation mapping in
this setting. A significant percentage of patients was on active
treatment with antiarrhythmic drugs at the time of the procedure and
this could have influenced the results of baseline PVS.