Limited to original work presented by residents in cardiothoracic surgery and/or residents in general surgical training programs who are working in a cardiothoracic surgical laboratory or clinical rotation in North America. Abstracts will be considered for presentation concerning basic and translational research as well as comparative effectiveness and related research. Training Program Directors are urged to have residents submit abstracts for the competition and must acknowledge that the material being presented is original work and that of the resident. This year the Lillehei Abstracts will include nine presentations comprised of the top three abstracts in adult cardiac, thoracic, and congenital heart. Authors of selected abstracts should plan to submit a manuscript two weeks prior to the meeting as this is part of the grading criteria for the award. There will be three Lillehei Award winners representing each subspecialty with each winner receiving $3,000. Each selected Lillehei presenter will receive complimentary registration for all events throughout the meeting.