Inclusion Criteria:  to be able to speak French or English; to be able to give free and enlighten consent; be hospitalized and waiting for a cardiac surgery of revascularization; to have had a myocardial infarction (MI) within the past 30 days or to be in a state of stable angina before the surgery.  Exclusion Criteria:  to be in a stable state without MI in the last 30 days; have a cardiac surgery concomitant to the cardiac surgery of revascularization; have an infection in the last 30 days; to have renal insufficiency (GFR less than 30); to have a liver disease (AST, ALT or bilirubin ˃ 2X normal values); to have a known cirrhosis; to have a past history of breast cancer or other tumors estrogen-dependent; to be intolerant to flavonoids, niacine or ascorbic acid; take quinolone; need for a quinolone during post-op; not being able to give a free and enlighten consent; not being able to speak French of English; take quercetin as a supplement.