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contentuptodate· Content· item f32_7_32884

©2013 UpToDate ® Print Email 12 lead ECG of atrial flutter The 12 lead ECG of atrial flutter shows a regular rhythm with a narrow QRS complex. Flutter waves are present, best seen in leads 2, 3, and aVF (*). One flutter wave is obvious between the QRS complexes, while the second one is superimposed on the terminal portion of the QRS complex; hence there is 2:1 atrioventricular nodal block, which is the most common presentation for atrial flutter. Reproduced with permission by Samuel Levy, MD.