<unk>  (Greek from ortho, straight + pnoia, breath) is dyspnea which occurs when lying flat, causing the person to have to sleep propped up in bed or sitting in a chair.<unk>  is a symptom of heart failure. It can also occur in those with asthma and chronic bronchitis, as well as those with sleep apnea or panic disorder.
It is commonly measured according to the number of pillows needed to prop the patient up to enable breathing (Example: "3 pillow<unk> ").
Orthopnea
Hypernea
Dyspnea
Myxedema
Apnea
Palpitation
Chest pain
Chest pain  