Table 2

 Cut-off values for BNP (derived from the BNP study4) and for NT-proBNP (derived from the PRIDE and ICON study5) for the diagnosis of heart failure of patients presenting with dyspnoea

Rule-outRule-in
HF unlikelyHF likely
BNP (pg/ml)100500
NT-proBNP (pg/ml), age <50 years300450
NT-proBNP (pg/ml), age >50 years300900