One Step Test for NT-proBNP/cTnI (Colloidal Gold) applies colloidal gold immunochromatography to detect N-terminal B-type natriuretic peptide precursor/cardiac Troponin I (NT-proBNP/cTnI) in serum, plasma or whole blood samples quantitatively. This test is used as an aid in the clinical diagnosis, prognosis and evaluation of Heart Failure (HF), Acute Myocardial Infarction (AMI) and Acute Coronary Syndrome (ACS).