The Maurice R. and Corinne P. Greenberg Division of Cardiology turns technological innovations in cardiology into heart disease therapies. The division has contributed to the field of cardiology by creating a heart disease-focused Cardiac Care Unit (CCU) and pioneering the use of the intra-aortic balloon pump. Division programs investigate the basic mechanisms of cardiovascular disease, including the genetic factors that impact various types of arrhythmias and heart disease and how mutations in cardiac cells might cause unexplained sudden death in young people. The division is dedicated to training tomorrow’s leaders in cardiology by training and supervising medical students and residents. It also offers four cardiology fellowships, plus a fifth in partnership with Brooklyn Hospital Center.