Inclusion Criteria:  Patient whose age ≥ 18 years Patient with ischemic heart disease managed for coronary artery bypass grafting (CABG) between 01/01/2016 and 12/31/2020 French-speaking patient  Exclusion Criteria:  Patient under guardianship or curatorship Patient deprived of liberty Patient under court protection Patient objecting to the use of his data for this research