P656Right ventricular dysfunction occurs in amateur male marathon runners: a three-dimensional echocardiography examination study. (28th August 2018) - Lewicka-Potocka, Z; Dabrowska-Kugacka, A; Kaleta, A M; Faran, A; Szymeczko, P; Fijalkowski, M; Lewicka, E; Raczak, G