The presence of an accessory pathway should be considered in atrial fibrillation with a ventricular rate faster than 180 beats/min.

Question

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A rapid ventricular rate in atrial fibrillation may be caused by conduction through an accessory pathway, leading to a potentially life-threatening arrhythmia called ventricular fibrillation. Therefore, it is important to consider the presence of an accessory pathway in patients with atrial fibrillation and a very fast ventricular rate.

The Presence of an Accessory Pathway Should Be Considered in Atrial