Correlation between NT proBNP and left ventricular ejection fraction in elderly patients presenting to emergency department with dyspnoea.

Objective: Shortness of breath is a common complaint for which the elderly seek medical attention in the emergency department (ED). Differentiating cardiac from respiratory causes of dyspnoea in this population is quite a challenge. N Terminal pro brain-natriuretic-peptide (NT proBNP) has been studied extensively as a biomarker of left ventricular (LV) failure.