The Society of Thoracic Surgeons is a not-for-profit organization representing almost 6,000 surgeons, researchers, and allied health professionals worldwide who are dedicated to ensuring the best possible heart, lung, esophageal, and other surgical procedures for the chest. Founded in 1964, the mission of STS is to enhance the ability of cardiothoracic surgeons to provide the highest quality patient care through education, research, and advocacy.