PO-05-067 THE USE OF THE HIS BUNDLE LOCAL ACTIVATION TIME IN OUTFLOW TRACT PREMATURE VENTRICULAR CONTRACTIONS TO ASSIST IN LOCALIZATION

Localization of premature ventricular contractions (PVCs) from the outflow tract regions based upon ECG localization criteria may prove challenging cardiac rotation and surface lead placement. Multiple studies describe parameters axis precordial R wave transition for distinction left (LVOT) vs right (RVOT) site origin. No previous intracardiac fiducial points to assist in discrimination PVC origin between LVOT, RVOT, intramyocardial sites. Assessment timing at His bundle region (HB) as a predictor area contraction. Timing HB could help discriminate intramural PVCs guide ablation strategy. We performed retrospective analysis 30 consecutive patients who underwent July 2021 until present day. During index mapping, placement multipolar catheter yielded local activation (LAT) PVCs, was marked on mapping system . The recorded well successful ablation. Of 10 were female 20 male with an average age 60 years. EF 52%. had coronary artery disease 9 ICDs. Patients LVOT LAT -6 msec +/- 12msec. 8 RVOT 32 +/-11msec. 12 45 +- msec. difference statically significant P<0.001. statistically P<0.0062. Use point assists accurate originating tracts.