Dr. Meucci has received speaker fees from Pfizer and AstraZeneca outside the submitted work. Dr Ajmone Marsan has received grants (to the institution) from Abbott Cardiovascular, Alnylam, AstraZeneca, Bayer, Biotronik, BioVentrix, Boston Scientific, Edwards Lifesciences, GE Healthcare, Medtronic, Medis Medical Imaging, Pfizer, Pie Medical, and Novartis; and has received speaker fees from Abbott Cardiovascular, Philips Ultrasound, Pfizer, and GE Healthcare outside the submitted work.