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Definition of Shortness of breath

Shortness of breath: Difficulty in breathing. Medically referred to as dyspnea. Shortness of breath can be caused by respiratory (breathing passages and lungs) or circulatory (heart and blood vessels) conditions and other conditions such as severe anemia or high fever. See also dyspnea.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=97560
Last Editorial Review: 9/20/2012

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