Age, gender, LV ejection fraction, LA dimensions, LV dimensions, use of beta-blockers, digoxin, furosemide, class IC antiarrhythmic drugs, amiodarone, calcium-channel blockers, AF duration, cardiovascular risk factors and baseline NT-pro-BNP levels were similar in patients with successful and unsuccessful cardioversion at univariate analysis (Table 2). Here, NPPB is linked to atrial fibrillation.