| http://www.w3.org/ns/prov#value | - Bronchioles end in tiny air sacs called alveoli.Reasons for the procedureA lung scan is most often performed when symptoms such as tachycardia (fast heart rate), dyspnea (difficulty in breathing), decreased oxygen saturation, chest pain not related to the heart, and other symptoms suggest the presence of a pulmonary embolus.Other problems of the lungs and respiratory tract that may be evaluated an
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