Orthopnea: Definition, Causes, and Treatment │ Sleep
Apr 29, 2021 · Orthopnea is a shortness of breath 1 some people experience when lying down, which goes away once they return to an upright position. The definition of orthopnea comes from the Greek words 2 for upright ( ortho) and breath ( pnoea ). It’s often a sign of heart failure 3, but can be caused by other conditions, such as lung diseases, other heart conditions, and obesity.
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