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contentuptodate· Content· item f40_0_40962

©2013 UpToDate ® Print Email Isorhythmic AV dissociation Rhythm strip showing sinus rhythm with isorhythmic atrioventricular dissociation. The sinus P waves and QRS complex have a similar rate, but the P waves are not conducted as ventricular depolarization is initiated by a junctional focus. Note that the P waves appear to move into, fuse with (beats 2 and 3), and then move out of (beats 4 through 7) the QRS complex. Courtesy of Ary Goldberger, MD.