Preoperative Levosimendan in CABG Patients With Poor LV Function

Inclusion Criteria: * 18 Years and older * scheduled for CABG with CPB * with or without asociated cardiac repair * ejection fraction less than 40% * signed informed consent Exclusion Criteria: * preoperative renal failure (creatinine clearance less than 30 ml/min) * liver failure (prothrombine time less than 50% in the absence of vitamin K antagonist) * cardiac surgery without CABG * pregnancy * emergency surgery * known allergy to levosimendan * severe hypotension prior to surgery * severe tachycardia * prior history of torsade de pointe * dynamic obstruction od left ventricular outflow tract * lack of signed informed consent.