P6464Echocardiographic effects of radiofrequency pulmonary veins isolation in paroxysmal atrial fibrillation and preserved/mid-range left ventricular systolic function. (28th August 2018) - Lizewska-Springer, A; Dabrowska-Kugacka, A; Drelich, Ł; Krolak, T; Lewicka, E; Raczak, G