Fig. 9.

VT initiation in Pig 3 ventricular model. A: Induced VT using VITA. Top left panel: AT map used to induce VT with the R-E solver within the down-sampled LV model. Top right panel: $V_{\mathrm{m}}$ map interpolated from the low to the high resolution model. $V_{\mathrm{m}}$ map obtained with the R-D model at t = 270 ms is also shown. Propagation occurs unidirectionally from the exit site towards the base of the LV. The wavefront travels around the scar and reenters the isthmus from the apex. B: Induced VT using VARP. $V_{\mathrm{m}}$ maps at different times show VT induction following the S1-S2 pacing protocol. White arrows represent successful propagation and lined arrows represent conduction block. The S2 beat was blocked at the isthmus’s mouth proximal to the stimulus site (t = 480 ms) and, similar to the VT in A, the wavefront revolves around the scar reentering the isthmus (t = 750 ms). VT induction in the LV model with both VITA and VARP can be fully appreciated in Supplemental Videos 1 and 2, respectively.