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Related to paroxysmal nocturnal dyspnea: orthopnea, sleep apnea, paroxysmal nocturnal hemoglobinuria


Difficult or labored breathing.



disruption of the rate and depth of respiration, accompanied by the sensation of shortness of breath.

Cardiac patients experience dyspnea both while physically exerting themselves and while subsequently resting in the horizontal position. Their condition is complicated by orthopnea, the inability to breathe except in a sitting position. In patients with cardiac diseases, attacks of severe dyspnea, which usually occur at night, are a symptom of cardiac asthma. In such cases, the dyspnea is inspiratory; that is, the patient finds it difficult to inhale. Expiratory dyspnea, difficulty in exhaling, arises when the lumina of the small bronchi and bronchioles are narrowed, as in bronchial asthma. It also arises when the elasticity of the lung tissue is lost, as in chronic emphysema of the lungs. Cerebral dyspnea is a result of direct irritation of the cerebral respiratory center by such abnormalities as tumors and hemorrhages.

References in periodicals archive ?
Retrospective history revealed one week of progressive dyspnea, orthopnea and paroxysmal nocturnal dyspnea with intermittent presyncope.
He did not have chest pain, hemoptysis, palpitations, orthopnea, paroxysmal nocturnal dyspnea, or any abdominal complaints.
There was no history of orthopnea and paroxysmal nocturnal dyspnea. The cough was episodic and dry in nature.
Paroxysmal nocturnal dyspnea, the complaint of frequently awakening with shortness of breath and coughing during the night, is common.
Genetic testing is also available Interstitial lung Interstitial pattern on chest disease x-ray and thin-cut CT scan of lungs Pneumonia Fever, chills, cough, and infiltrate on chest x-ray Congestive Orthopnea, paroxysmal nocturnal dyspnea, heart failure and characteristic chest x-ray findings Pulmonary Breathing difficulty and chest embolism pain usually of sudden onset.

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