Silvio Romano1, Renata Petroni2,3. 1. Cardiology, Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy. Electronic address: silvio.romano@cc.univaq.it 2. Cardiology, Department ofLife, Health and Environmental Sciences, University ofL’Aquila, L’Aquila, Italy 3. Department of Medicine, DiLorenzo Clinic, Avezzano, Italy