
<symptom> Shortness of breath when lying flat. This is a common symptom in patients suffering from congestive heart failure. ... Orthopnoea may be described as two pillow orthopnoea. This means the patient needs to sleep propped up by two pillows in order to breathe. ... (27 Sep 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

Shortness of breath on lying flat.
Found on
http://www.gadsbywicks.co.uk/uploaded/3822.pdf

orthopnea, orthopnoea (British) 1. The ability to breathe easily only in an upright or sitting position or discomfort in breathing which is brought on or aggravated by lying down. 2. Shortness of breath experienced when lying down. 3. Difficult breathing that is partially, or wholly, relieved by an erect sitting or standing position; associated w...
Found on
http://www.wordinfo.info/words/index/info/view_unit/1709/

breathing difficulty experienced while lying flat; can be a symptom of heart failure or asthma
Found on
https://www.encyclo.co.uk/local/20875
No exact match found.