The Johns Hopkins Hospital Cardiovascular Surgical ICU (CVSICU) is a 18 bed adolescent/adult surgical intensive care unit, 4 of these beds are designated for ECMO. Primary patient population: critically ill patients that have undergone cardiac surgery including: coronary artery bypass, valve replacement or repair, Type A aortic dissections, heart or lung transplantation, mechanical circulatory support device implantation Heartmate II or III, & Heartware .