Postural Mobilization Compared to Noradrenaline Only in Off-Pump CABG Surgery

Inclusion Criteria: * Adult patient * patient requiring isolated coronary bypass surgery * Elective procedure or medical emergency * First cardiac surgery * Patient with an EF ≥30% * Mandatory affiliation to a social security system * Signed informed consent form * Suspension of renin-angiotensin system inhibitors and angiontensn-neprilysin receptor blockers and sartans the day before surgical procedure Exclusion Criteria: * Contraindication to an inotropic substance (only NA will be used) * Contraindication to passive leg raising * Patient in a life-threatening emergency * History of cardiac surgery * Bilateral iliac or common femoral artery occlusion * EF \< 30% * Pregnancy and breastfeeding * Renal failure (GFR \< 40 ml/min/1.73 m²) * Patient with bilateral thigh amputation * Class III obesity BMI \> 40 kg/m²