To evaluate the effect on cognitive function, recovery, cardioprotection and haemodynamics of standard Remifentanil anaesthesia to standard Sufentanil anaesthesia in patients undergoing coronary artery bypass with or without aortic valve replacement.

1. Haemodynamic effects, evaluated by invasive haemodynamic data (arterial line and PAC) of opioid given as single drug and in combination with Propofol (first 30 patients only).
2. Cognitive dysfunction evaluated by standard test preoperative and postoperative day 1, 4 and 30
3. Recovery quality and time parameters using objective ICU score criteria
4. Cardioprotection effect evaluated by myocardial biochemical markers obtained preoperative and postoperative 4, 9 and 18 hours

Inclusion Criteria:

• Patients scheduled for coronary artery bypass grafting (CABG) +/- aortic valve replacement (AVR)

Exclusion Criteria:

• Ejection Fraction < 30%
• Previous Myocardial Infarction within 4 weeks
• Severe pulmonary hypertension (mean pulmonary artery pressure (mPAP) > 33% of mean arterial pressure (MAP)
• Arterial hypertension (Sap > 180, Dap > 110)
• Diabetes, Non- and Insulin dependent
• Non usable echocardiography windows