The history of cardiac surgery; autonomic neurology; special circulation; cardiac anatomy and physiology; respiration and ventilation; essential renal physiology; the clotting mechanism; basic pharmacology; nutrition; the return to ICU; monitoring on the ICU; circulatory support, inotropes or balloon; hypotension; postoperative hypertension; postoperative bleeding; postoperative arrythmia; tachyarrythmias; problems of gas exchange; oliguria and anuria; agitation; normal values; useful drugs.