The principal objective of the study is to describe transfusional strategies of FFP in patients undergoing cardiac surgery. The other objectives are: to assess the conformity of FFP transfusion or lack of transfusion to current French authorities' recommendations, to describe the post-operative mortality and morbidity and to assess the prognostic role of FFP on mortality and morbidity. Prognostic analyses will take into account other prognostic factors of mortality and morbidity.