Shortness of breath (SOB), also known as dyspnea (BrE: dyspnoea) is a feeling of not being able to breathe well enough. The American Thoracic Society defines it as 'a subjective experience of breathing discomfort that consists of qualitatively distinct sensations that vary in intensity', and recommends evaluating dyspnea by assessing the intensity of the distinct sensations, the degree of distress involved, and its burden or impact on activities of daily living. Distinct sensations include effort/work, ...
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