orthopnea

• 端坐呼吸：一种医学症状，指平卧时出现呼吸困难，必须坐起或站立才能顺畅呼吸；常与哮喘、肺气肿或心绞痛等疾病相关。

A medical condition characterized by difficulty breathing that occurs when lying flat, requiring the person to sit or stand upright to breathe comfortably; often associated with asthma, emphysema, or angina pectoris.

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1. Breathing difficulty when lying downC2formalmedical

   A condition in which a person has difficulty breathing while lying flat, and must sit or stand upright to breathe comfortably.

   端坐呼吸

   • Patients with orthopnea often need to sleep propped up on several pillows.
   • The doctor diagnosed orthopnea as a symptom of heart failure.
   • She experienced orthopnea, which made it impossible to lie down without coughing.