P4535Right ventricular response to stress in pulmonary arterial hypertension. (28th August 2018) - Guida, S; Ghio, S; Fortuni, F; Matrone, B; Vullo, E; Turco, A; Scelsi, L; Raineri, C; Lombardi, C; Badagliacca, R; Oltrona Visconti, L