− | Pro-brain natriuretic peptide (NT-proBNP) concentration is associated with severity of DMVD. Elevated NT-proBNP levels are useful in discriminating patients with respiratory distress caused by heart failure from those with primary respiratory tract disease. | + | Pro-brain natriuretic peptide ('''NT-proBNP''') concentration is associated with severity of DMVD. Elevated NT-proBNP levels are useful in discriminating patients with respiratory distress caused by heart failure from those with primary respiratory tract disease. |