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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 ?
The cloned male calf at the Oita prefectural livestock experimental station died of breathing difficulty about 40 minutes after being born by Cesarean section.
Typically, patients report the following symptoms: chest or abdominal pain, breathing difficulty, recent weight loss, anorexia and fatigue at the time of diagnosis.
When his respiratory distress worsened, an oral airway tube was placed, and his breathing difficulty resolved immediately.
His 4-year-old daughter complained of breathing difficulty and was transported to UCLA Medical Center.
Some people who worked near or with water or sediment in fish kill areas have suffered short- and long-term symptoms believed to be linked to Pfiesteria such as memory loss, learning impairment, breathing difficulty, nausea, lethargy, and skin lesions.
People being screened will learn whether they should seek a professional diagnosis for any breathing difficulty, and current asthma sufferers can evaluate whether their disease is under control.