Relationship between CT Findings and the Plasma Levels of Brain Natriuretic Peptide in 29 Patients with Acute Cardiogenic Pulmonary Edema

Abstract

Brain natriuretic peptide (BNP) is a useful biomarker for the assessment of cardiogenic pulmonary edema. This study evaluated the relationship between computed tomography (CT) findings and plasma BNP levels in patients with cardiogenic pulmonary edema. Twenty-nine consecutive outpatients with severe respiratory failure from cardiogenic edema presenting to emergency departments were enrolled. They underwent chest CT and plasma BNP levels were measured in the emergency room. CT findings were independently evaluated by two radiologists who were unaware of the patients' clinical information. The plasma BNP levels only correlated with the volume of pleural effusion in each side (right: r(s) = 0.519, P = .004; left: r(s) = 0.460, P = .012). No significant correlation was observed between the BNP levels and the findings of lung parenchyma or cardiovascular enlargement. Estimating the pleural effusion volume with CT may be a feasible method as well as measuring the plasma BNP level in the assessment of acute cardiogenic pulmonary edema.