Recent experimental and clinical data suggest a benefit of levosimendan on the kidney function. Therefore, this retrospective, single center, matched-pairs analysis aimed to investigate whether administration of levosimendan was associated with improved renal function in cardiac surgery patients.

Inclusion Criteria:

• Patients undergoing cardiac surgery (OPS 5-35 bis 5-37) between 2007 and 2011 followed by postoperative observation on an ICU of the anaesthesiology department of the Charité hospital

Exclusion Criteria:

• Patients younger 18
• Preexisting renal insufficiency

Patients undergoing cardiac surgery between 2007 and 2011 followed by postoperative observation on an ICU of the anaesthesiology department of the Charité hospital