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Levosimendan Reduces Lung Injury in a Canine Model of Cardiopulmonary Bypass
Junbo Feng,Haiyuan Liu,Jiayi Chen,Jiyuan Wang,Zhuang Liu,Shenglin Ge 대한심장학회 2016 Korean Circulation Journal Vol.46 No.3
Background and Objectives: To explore the lung-protective effect of levosimendan (LS) during cardiopulmonary bypass in a canine modelby determining the wet/dry weight (W/D) ratio of lung tissue, malonaldehyde (MDA) and superoxide dismutase (SOD) concentrations, andperforming a histological evaluation. Materials and Methods: Thirty-two canines were divided randomly into four groups and underwent a routine aortic cross-clampingcardiopulmonary bypass procedure for 1 h, followed by recovery for 2 h. Animals were handled as follows: group C (means controlgroup), no special treatment after aortic cross clamping; group P (means pulmonary artery perfusion group), pulmonary artery perfusionwith cold oxygenated blood after aortic cross clamping; group LSIV (means intravenous injection of LS group), intravenous injection of LS(65 μg/kg) before thoracotomy, and the rest of the procedure was identical to the control group; group LPS (means pulmonary perfusionwith LS group), pulmonary perfusion with cold oxygenated blood combined with LS (65 μg/kg) after aortic cross clamping. Lung tissueswere removed and subjected to evaluation of pathological alterations, W/D ratio and MDA and SOD concentrations. Results: In group C, the W/D ratio and MDA concentration were higher, while the SOD concentrations were lower (p<0.05). Comparedwith groups P and LSIV, the MDA concentration was lower in group LPS, while that of SOD was higher (p<0.05); Light and electronmicroscopy indicated that LS intervention reduced impairment of lung tissues. Conclusion: Our findings suggest that LS plays an important role in protecting lung tissues.