19 Sharma Sharma V V Stewart Stewart RA RA Lee Lee M M Gabriel Gabriel R R van Pelt van Pelt N N Newby Newby DE DE et al et al Plasma Brain Natriuretic Peptide Concentrations in Patients with Valvular Heart Disease Plasma Brain Natriuretic Peptide Concentrations in Patients with Valvular Heart Disease Open Heart Open Heart 2016 2016 3 3 1 1 e000184 e000184 10.1136/openhrt-2014-000184. Here, NPPB is linked to heart valve disorder.