The plasma ET 1, NO, ANP concentrations were assayed at 24 h pre operation and 0 h, 1 h, 5 h, 12 h, 24 h, 48 h after CPB. Results The preoperative plasma ET 1, NO and ANP concentrations in group B were significantly higher than those in group A.

• 分别测定血浆ET 1、NO、ANP含量。 结果 术前B组血浆ET 1、NO、ANP水平明显高于A组 (P <0 0 5 )。