Da Costa's Syndrome is a type of anxiety disorder first observed in soldiers in the American Civil War. It causes symptoms similar to heart disease but, upon examination, nothing is found to be physically wrong with the patient. The symptoms usually consist of fatigue upon exertion, combined with shortness of breath, palpitations, sweating, chest pain, shaking, and, less commonly, fainting. The symptoms may increase whilst exercising, and it is thought to be caused partly by hyperventilation. Anxiety disorder is a blanket term covering several different forms of abnormal, pathological anxiety, fears, phobias and nervous conditions that may come on suddenly or gradually over a period of several years, and may impair or prevent the pursuing of normal daily routines. ... This article is becoming very long. ... In medicine, hyperventilation (or hyperpnea) is the state of breathing faster or deeper (hyper) than necessary, and thereby reducing the carbon dioxide concentration of the blood below normal. ...
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