Paroxysmal Nocturnal Dyspnea Definition

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Paroxysmal Nocturnal Dyspnea:

A disorder characterized by episodes of respiratory distress, usually occurring after several hours of sleep in a reclining position. It is most commonly caused by pulmonary edema resulting from congestive heart failure. The episodes may be accompanied by coughing, a feeling of suffocation, a cold sweat, and tachycardia.