PO-03-090 NOVEL HIGH RESOLUTION MR IMAGING IMPROVES PRE-PROCEDURE IDENTIFICATION OF ABLATION TARGETS IN POST-INFARCT VENTRICULAR TACHYCARDIA

MRI-based personalized virtual heart models (VHM) are a useful tool for reconstructing scar distribution and identifying VT circuits planning catheter ablation procedure, an effective therapy preventing sudden cardiac death from in patients with myocardial infarction. However, the MRI resolution used to reconstruct VHMs may not be sufficient accurately detect all circuits, possibly leading erroneous predictions. To predict targets arrhythmogenic substrate using reconstructed both clinical high-resolution 2D datasets compare High-resolution (1.352 x 3mm) short-axis were acquired by combining two subsequent 6mm) nine post-infarct undergoing ablation. The total of three each patient that represented patient-specific infarct remodeling. Rapid pacing was assess identify VHM. Differences inducibility location assessed between high VHM reconstructions, as well reconstructions. Virtual ablations performed emergent VTs also compared patient. amount fibrotic remodeling changed 12.6 ± 3.3% patient, while only moderately affected (Fig 1). heterogeneity myocardium fractal dimension (complexity) tissue statistically different observed average 2.7 [1-4] unique morphologies induced In patients, one able exit sites within 5mm 72.2% cases. uncovered VHMs, corresponding VHMs. required terminate 44.4% cases more improve outcomes.