Browse the corpus
Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.
2 passages
©2013 UpToDate ® Print Email Atrial fibrillation Lead V1 showing coarse atrial fibrillation with moderate ventricular response. The two characteristic findings in AF are present: the very rapid atrial fibrillatory waves (f waves) which are variable in appearance; and the irregularly irregular ventricular response as the R-R interval between beats is unpredictable. Coarse atrial fibrillation may appear similar to atrial flutter. However, the variable height and duration of the f waves differentiate them from atrial flutter (F) waves which are identical in appearance and occur at a constant rate of about 250 to 350 beats/min. Courtesy of Ary Goldberger, MD. Normal rhythm strip Normal rhythm strip in lead II. The PR interval is 0.15 sec and the QRS duration is 0.08 sec. Both the P and T waves are upright. Courtesy of Morton F Arnsdorf, MD.
©2013 UpToDate ® Print Email Atrial fibrillation Lead V1 showing coarse atrial fibrillation with moderate ventricular response. The two characteristic findings in AF are present: the very rapid atrial fibrillatory waves (f waves) which are variable in appearance; and the irregularly irregular ventricular response as the R-R interval between beats is unpredictable. Coarse atrial fibrillation may appear similar to atrial flutter. However, the variable height and duration of the f waves differentiate them from atrial flutter (F) waves which are identical in appearance and occur at a constant rate of about 250 to 350 beats/min. Courtesy of Ary Goldberger, MD. Normal rhythm strip Normal rhythm strip in lead II. The PR interval is 0.15 sec and the QRS duration is 0.08 sec. Both the P and T waves are upright. Courtesy of Morton F Arnsdorf, MD. Lead V5 from the same patient with atrial fibrillation F waves are not apparent in this lead, as the only finding suggestive of AF is the irregularly irrregular ventricular response. Courtesy of Morton Arnsdorf, MD. Normal rhythm strip Normal rhythm strip in lead II. The PR interval is 0.15 sec and the QRS duration is 0.08 sec. Both the P and T waves are upright. Courtesy of Morton F Arnsdorf, MD.