Figure 15b

Irregular wide QRS tachycardia. A rapid irregular rhythm with wide QRS complexes having a left bundle branch block pattern is recorded. The rhythm is atrial fibrillation with abnormal intraventricular conduction (aberrancy).

Myerburg, R.J., M.D., Castellanos, A., M.D., Kessler, K.M., M.D., Recognition, Clinical Assessment and Management of Arrhythmias and Conduction Disturbances, Hurst's The Heart, 8th ed, p 726. (modified)