RecruitingClinical trialSAGE-Heart : Senior Assessment fraGility and Post-opErative QALYs 1 Year After Emergency HEART Surgery for Patients Aged 75 and OlderThe hypothesis is that the preoperative Clinical Frailty Score (CFS) is a predictive factor for a loss in quality-adjusted life years (QALYs) one year after emergency cardiac surgery under cardiopulmonary bypass (CPB) in patients aged 75 years and older.