[RESULTS] Levosimendan also could decrease the lactic acid ( mmol/L : 3.4 1.1 vs. 5.2 1.2 , t = 3.346 , P = 0.007 ) , and increase the lactate clearance rate ( mL/min : 73.2 13.5 vs. 47.6 11.8 , t = -4.079 , P = 0.002 ) , 24-hour urinary output ( mL : 2 213.4 354.0 vs. 1 533.8 402.0 , t = 6.342 , P = 0.000 ) and 24-hour cumulative intake ( mL : 5 746.6 420.0 vs. 4 156.7 215.0 , t = 7.126 , P = 0.000 ) .