Objective To study the role of calpain inhibitor in improving cardiac function in burn-blast combined injury rats.Methods Seventy-two male SD rats were randomly divided into control group,burn-blast group and calpain inhibitor group,with 24 rats in each group.Control group was bathed in 37℃ warm water for 12s.Burn-blast group was treated with explosion+94℃ hot water scalds for 12s.Calpain inhibitor group was intraperitoneally injected with calpain inhibitor MDL28170 24mg/kg after burn-blast combined injury....