Friday, June 26, 2015

EKG Rhythm Strip

Identify the following rhythm. (Click on the image to enlarge)

Atrial fibrillation with ventricular escape beats.  The underlying rhythm is atrial fibrillation.  Beats  4, 5, and 6 occur late in the cardiac cycle. The morphology of the QRS complex is much wider than the QRS complexes of beats 1, 2, 3, and 7. The R - R interval between beats 3 and 4 is about 37 small boxes, this corresponds to a rate of about 40 beats/min.  Since the inherent rate of the ventricles is 20 - 40 bpm, complex 4 falls within the upper limits of an escape beat of ventricular origin. Complexes 5 and 6 occur at the same rate.  

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