Although our study was not aimed at investigating outcomes after STEMI, the finding that NT-proBNP levels decreased significantly to a median of 252 pg/mL, well below the rule-in cutoff values for manifest HF (>600 pg/mL), is comforting and argues against significant HF in our early STEMI population despite the CoQ10 depletion. Here, NPPB is linked to hydrops fetalis.