PO.3.56 Anti- Ro/SSA antibodies and electrocardiographic abnormalities in SLE patients: preliminary data of a multidisciplinary study in a monocentric cohort by F Franceschini, M Fredi, S Bertocchi, E Pedretti, R Rovelli, L Serafini, A Drera, M Riccardi, F Ravasio, E Vizzardi