Correlation of EnSite electro-anatomical mapping with tissue heterogeneity assessment with CMR. a: MRI shell with scar core (white, shown by arrow) and grey zone (grey) superimposed on the EnSite shell illustrating the voltage potential map (blue = maximum voltage, red ≤ 30% of maximum voltage). b: MRI shell with scar distribution superimposed on the EnSite shell illustrating the isochrone map during VT (red = exit point). c: Bull's plot of EnSite substrate map during sinus rhythm (blue = maximum voltage, red ≤ 30% of maximum voltage). d: Bull's eye plot of endocardial scar distribution scar core (white), grey zone (grey) and healthy (black) from CMR. e: Bull's eye plot of isochrone map illustrating the locations of the earliest activation (red, exit point) and latest activation (blue) during VT. f: Bull's eye plot of transmural myocardial signal intensity variation on CE-CMR reflecting heterogeneity in myocardial tissue (blue = most homogenous transmural signals, likely to represent healthy myocardium; red = most heterogeneous transmural signals, likely to represent fibrotic tissue). g. Unipolar signal recording from MEA during 3 sinus rhythm beat (x-axis = time; y-axis =voltage).