Consistent with the current FDA label for dronedarone, patients who have been hospitalized in the last 4 weeks with acute heart failure are not eligible for treatment with dronedarone. If a patient has no recent HF hospitalization but has advanced HF (class III or IV) they are also ineligible. Thus, persons with NYHA 1-2 heart failure and no hospitalization for HF in the last 4 weeks are eligible for CHANGE AFIB.