578 LONG-TERM OUTCOME OF VENTRICULAR TACHYCARDIA CATHETER ABLATION IN PATIENTS WITH CHRONIC CORONARY TOTAL OCCLUSION

Abstract Background Chronic coronary total occlusions (CTO) are considered an emerging predictor of ventricular arrhythmias (VAs) but currently there only few data on arrhythmic outcomes in patients affected by CTO undergoing radiofrequency catheter ablation VAs. Objective This study sought to evaluate the impact unrevascularized recurrence VAs after ablation. Methods was a single-center retrospective that enrolled 120 patients, between 2015 and 2020. All were admitted for tachycardia (VT) or high premature contractions (PVCs) burden (>25% detected Holter ECG), without evidence acute syndrome; they underwent angiography, electrophysiology (EP) three-dimensional electroanatomic mapping (3D-EAM) followed Results Twenty-eight (23%) showed at angiography. At baseline, group presented with higher prevalence hypertension, chronic renal disease, systolic dysfunction, secondary prevention ICD implantation, rate low abnormal activities 3D-EAM compared non-CTO group. median follow-up 15 months (range 1-96 months) ablation, independent presence moderate severe left (LV) dysfunction (p=0.02). Conclusion The does not predict which is instead predicted LV dysfunction.