High-sensitivity cardiac troponin T (cTnT), a biomarker of cardiomyocyte injury, and N-terminal pro-brain natriuretic peptide (NT-proBNP), a marker of left ventricular wall stress, have both been associated with increased HF risk.20–22 NT-proBNP and cTnT have been shown to be raised in patients hospitalised with COPD.7, 8, 9 Whether such changes are seen in those with mild airflow obstruction or low normal lung function has been little studied in the general older population. Here, NPPB is linked to hydrops fetalis.