CTSNet.org is the most comprehensive, heavily trafficked, and reliable online source of information about cardiothoracic surgery available worldwide, and its online community of cardiothoracic surgeons is the largest in the world. A not-for-profit organization, CTSNet is jointly overseen by The Society of Thoracic Surgeons (STS), the American Association for Thoracic Surgery (AATS), and the European Association for Cardio-thoracic Surgery (EACTS). Numerous other cardiothoracic surgery organizations from around the world are involved in CTSNet as Participating Organizations.

The mobile application provides access to profile pages for surgeons and individuals associated with the specialty, a broad range of video educational content, and podcasts about topics germane to cardiothoracic surgery.