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contentuptodate· Content· item f26_62_27620

©2013 UpToDate ® Print Email Atrial flutter RA recording Atrial flutter which is inapparent in lead I (upper panel); suggested by prominent negativity in lead II (arrows, middle panel), which could also represent biphasic T waves; and documented by right atrial recording, which shows prominent negative deflections (arrows, lower panel). 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.