NPPB and Ventricular arrhythmia: The presence of a NT-proBNP serum level >287 pg/ml had a sensitivity of 50% and a specificity of 93% with an area under the curve (AUC) of 0.713 in predicting a number > 100 PVC/24 h on the Holter ECG monitoring, a sensitivity of 55% and a specificity of 93% (AUC=0.758) in predicting complex ventricular arrhythmias (ventricular bigeminy, couplets or triplets) and a sensitivity of 35% and a specificity of 93% (AUC=0.801) in predicting the presence of polymorphic PVC.