P1182Asymptomatic masses on the pacing leads - influence on long term survival

Abstract Background Asymptomatic Masses on Endocardiac Leads (AMELs) are relatively often found in echocardiography in patients with cardiac implantable electronic devices (CIED) but their clinical significance is unknown. Purpose Aim of the study was to evaluate the incidence of AMELs and assesment of their influence on long term survival (mean follow up- 4,28 ± 3,13 years) of patients undergoing transvenous leads extraction (TLE). Methods We analyzed the clinical data of patients undergoing TLE in single center in years 2006-2019. Echocardiography before TLE was performed in 2558 patients (60,4% male). AMELs were detected in 426 (16,7%) cases. Classifications of AMELs included connective tissue surronding the leads, clots, alike vegetations masses. Additionally, real vegetations, thickening of the leads and strong connective tissue scars were distinguished. Long term survival was compared between individual types of AMELs and patients without any additional masses on the leads. Results are presented in the table. Conclusion Poor long-term survival was observed in patients with AMELs on the pacing leads. Abstract Table