Access Natriuretic Peptide Assay(s) Pivotal - Emergency Department Subject Enrollment and Specimen Collection

A prospective clinical sample collection and future natriuretic peptide testing will be conducted in an emergency department only population. Patients presenting to the Emergency Department (ED) with signs and symptoms of acute heart failure will be approached for enrollment. Clinical and laboratory data will be collected to establish product performance and clinical concordance to adjudicated clinical diagnosis. Approximately 1800 evaluable subjects at geographically dispersed sites in the US will be enrolled in the study. Sample collection and testing of clinical samples with the Access Natriuretic Peptide assay will be performed under two separate protocols