Arrhythmia monitoring. Arranged at the time of discharge, transtelephonic or Holter monitoring for a month assesses for arrhythmias. Atrial fibrillation can recur for up to four weeks after the procedure. The ablation itself can cause pericarditis in the atria, which can trigger episodes of self-limiting atrial fibrillation. Medications should be continued until heart rate is controlled. If postprocedural atrial fibrillation does not resolve with time, a repeat ablation may be considered.