端坐呼吸（orthopnea）指患者为了减轻呼吸困难被迫采取端坐位或半卧位的状态。端坐呼吸是一种强迫体位，又叫强迫坐位。心功能不全的患者端坐呼吸，可使下肢储存血增加，回心血量减少，减轻心脏负担，心功能不全的症状减轻。这是心衰更为严重的表现，出现端坐呼吸提示心力衰竭已有明显肺淤血。针对原发病治疗，去除诱发因素。
由肺水肿和肺静脉压升高引起的呼吸困难在卧位时加剧，在坐位，立位（端坐呼吸）时减轻。
Dyspnea due to elevated pulmonary venous pressure and pulmonary edema is increased in the recumbent position and decreased by sitting or standing (orthopnea).
我们报告一个罕见病例，26岁初产妇于怀孕34周并发恶性林巴瘤以严重呼吸困难及端坐呼吸为表现。
We report a rare case of a 26-year-old primigravida at 34 weeks' gestation complicated with malignant lymphoma presenting as severe dyspnea and orthopnea.
半年后，因为严重的端坐呼吸，又到医院求诊，当时怀疑患有心脏衰竭，但临床证据并不支持此项诊断。
Severe orthopnea was complained half a year later, and congestive heart failure was suspected, but clinical data did not support this diagnosis.
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