NPPB and heart failure: International Takotsubo Diagnostic Criteria (InterTAK), Mayo and European Heart Failure Association of the European Society ofCardiology diagnosis criteria include transient regional wall motionabnormalities of the left (and occasionally right) ventricle in the presence ofelectrocardiographic dynamic changes and positive troponin and brain natriuretic peptide (BNP) levels withouta culprit coronary artery lesion [2, 3, 4, 5].