Why do I need a natriuretic peptide test?You may need a BNP test or an NT-proBNP test if you have symptoms of heart failure. These include:Difficulty breathingCoughing or wheezingFatigueSwelling in abdomen, legs, and/or feetLoss of appetite or nauseaIf you are being treated for heart failure, your health care provider may order one of these tests to see how well your treatment is working.
