慢性肺心病合并重症低钠血症临床上容易误诊,延误治疗可致严重后果。本文报告12例该病患者,其中8例入院时曾经误诊或忽视了低钠血症诊断。全部患者经血电解质、肾功能及血液气体分析结合临床表现而确诊。对发病原因,鉴别诊断及治疗加以讨论。 Chronic pulmonary heart disease with severe hyponatremia clinical easy misdiagnosis, delay treatment can cause serious consequences. This article reports 12 patients with the disease, of which 8 were admitted to the hospital had misdiagnosed or ignored the diagnosis of hyponatremia. All patients with blood electrolytes, renal function and blood gas analysis combined with clinical manifestations and confirmed. On the etiology, differential diagnosis and treatment to be discussed.