Sample Requirements:
EDTA tube, centrifuge and freeze if not tested immediately
Purpose:
Assesses heart failure severity by measuring N-terminal pro B-type natriuretic peptide.
High Levels:
Suggests heart failure, left ventricular dysfunction, or volume overload.
Low Levels:
Normal; heart failure unlikely.
Reference Range:
<125 pg/mL (under 75 years); <450 pg/mL (age-adjusted)