某肺心病患者伴水肿，用呋塞米利尿后，其血气分析及电解质测定如下：pH7.34，PCO<img src="/Image1/2a/2a2b6e575952d570147853cbe28636dc.gif" style="height: auto; max-width: 100%;" />66mmHg，HCO<img src="/Image1/89/899ee5808fc1c9eb5811cd87c4e802dd.gif" style="height: auto; max-width: 100%;" />36mmol／L，Na<img src="/Image1/63/63ddb9dd2671ddf96ca7b44582e389ef.gif" style="height: auto; max-width: 100%;" />140mmol/L，Cl<img src="/Image1/a2/a213d0a4cc5bfa54f468fd1e852f04ed.gif" style="height: auto; max-width: 100%;" />75mmol/L，应属何种酸碱平衡紊乱？诊断依据是什么？