近年来发现,许多非甲状腺疾病可伴有血清三碘甲状腺原氨酸(T_3)和甲状腺素(T_4)浓度的降低,但临床上并无甲状腺功能减退的表现,分别称为“低T_3综合征”和“低T_4综合征”。国内陈氏等,于1981年报道了慢性支气管炎和肺心病T_4测定结果分析。由于肺心病患者常并发慢性呼吸衰竭,提示慢性呼吸衰竭患者的血清甲状腺素浓度亦可能呈现与肺心病患者 In recent years, many non-thyroid diseases have been found to be associated with decreased levels of serum thyroxine (T_3) and thyroxine (T_4), but clinically without hypothyroidism, known as “low T_3 syndrome ”And“ low T_4 syndrome. ” Chen and other domestic, reported in 1981 chronic bronchitis and pulmonary heart disease T_4 determination results. As patients with pulmonary heart disease often complicated by chronic respiratory failure, suggesting that patients with chronic respiratory failure serum thyroid hormone concentrations may also appear with patients with pulmonary heart disease