<unk>  or<unk>  <unk>  is an attack of severe shortness of breath and coughing that generally occurs at night. It usually awakens the person from sleep, and may be quite frightening.<unk> , as well as simple orthopnea, may be relieved by sitting upright at the side of the bed with legs dangling, as symptoms typically occur when the person is recumbent, or lying down.
Paroxysmal nocturnal dyspnoea
Exercise intolerance
Expiratory apnea
Platypnea
Trepopnea
Sleep apnea
Periodic breathing
Generalized hypoxia