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Various risks have to be considered in association with high-
frequency atrial pacing. The risks possible ventricular pacing
and ventricular tachycardia or fibrillation. This can be caused
by poor placement of the leads or the presence of anomalous
stimulus conduction paths that circumvent the normal atrio-
ventricular stimulus conduction (e.g. Wolff-Parkinson-White
Syndrome). Patient discomfort and asystole after high-
frequency pacing are other possible problems.