The Cooper Heart Institute’s Cardiothoracic Surgery program has received "3 Star" ratings from the prestigious Society of Thoracic Surgeons (STS) in two separate categories: coronary artery bypass graft surgery (CABG) and aortic valve replacement surgery (AVR). It is the organization's highest quality ranking, and Cooper is among only two percent of participating hospitals with similar programs to earn “3 Star” ratings in both categories.