The need for readmission and atrial fibrillation reoccurrence as reported by the phone questionnaire (Secondary Aim-3) will be compared between the two medication regimens using Chi-square with continuity correction analyses. The investigators will also determine which rate control medication at time of phone interview associates with freedom from atrial fibrillation reoccurrence using chi-square analysis. Lastly, the time between discharge and phone survey study completion (maximum: 6 months) will be determined and the investigators will examine the effect of this lag time (4- 6 months) on the percentage of patients requiring readmission and/or having a reoccurrence of atrial fibrillation via chi square analysis.