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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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contentuptodate· Content· item f6_43_6835

©2013 UpToDate ® Print Email Atrial bigeminy Atrial bigeminy in which each sinus beat is followed by a premature atrial complex. The premature P waves (arrows) appear to be inverted in lead II, suggesting that they originate from a low atrial ectopic focus. The tall peaked P waves of the sinus beats are consistent with right atrial abnormality (overload). Courtesy of Ary Goldberger, MD.