“…Fellows with a background in pediatric cardiology, need formal training in the management of acquired cardiac and non-cardiac disease [4]. Fellows embarking on ACHD training following adult cardiology training need additional education and experience in the anatomic and physiologic concepts of CHD [4,5]. For both cohorts of trainees, direct experience in various subspecialties of ACHD, such as heart failure, imaging and intervention, is vital [3][4][5][6][7].…”