PO-05-090 LOCAL IMPEDANCE AND CONTACT FORCE FOR EFFECTIVE ABLATION OF PREMATURE VENTRICULAR CONTRACTIONS

Contact force (CF) radiofrequency (RF) catheter ablation is a well-established approach to treating idiopathic premature ventricular contractions (PVCs) from the outflow tracts (OTs), and associated with favorable outcomes, albeit up 30% recurrence rates even in very experienced hands. How addition of local impedance (LI) feature may improve procedural outcome unknown. We aimed study whether use combining LI CF information was superior outcomes compared other technologies. three groups 40 propensity-matched patients PVCs OTs, ablated by means different technologies: CF- plus LI-featured catheter, an standard irrigated catheter. The created matching displayed no significant difference baseline clinical variables. Median age 56[40-63] years 54% female. Prior ablation, median LVEF 57[43-63] % daily PVC burden 22[14-29] %. sites successful were well balanced among 3 groups, 77 (64%) localized right tract (RVOT), 24 (20%) coronary cusps, 19 (16%) left excluding cusps (LVOT). CF+LI group significantly lower risk than (HR, 0.22; 95%CI, 0.07-0.71; p=0.01). In group, drop RF time only predictors lesions (OR=1.19, CI: 1.13–1.26, p<0.001; OR=1.06 1.01-1.07, p=0.044, respectively). unlike RVOT/LVOT region, not (p=0.48), duration showed linear relationship (p<0.001). most important predictor effective lesions. catheters that combine increased success OTs.