Abstract
Natriuretic peptides are biomarkers of myocardial stress and are frequently elevated
among patients with severe respiratory illnesses, typically in the absence of elevated
cardiac-filling pressures or clinical heart failure. Elevation of brain natriuretic
peptide (BNP) or NT-proBNP is associated with worse outcomes among patients with Acute
Respiratory Distress Syndrome (ARDS). We conducted a retrospective cohort study based
on a comprehensive review of Electronic Medical Records (EMRs) of patients with Coronavirus
Disease 2019 (COVID-19) to evaluate whether BNP on admission has prognostic value
on mortality and hospital length of stay (LOS) among patients admitted with confirmed
COVID-19 along with the inclusion of additional prognostic variables. Overall, 146
patients were included after analyzing 230 patients’ EMR and excluding potential confounding
factors for abnormal BNP. Our statistical analysis did not show a statistically significant
association between BNP level and mortality rate (P = 0.722) or ICU LOS ( P = 0.741). A remarkable secondary outcome to our study was that impaired renal function
(GFR<60) on admission was significantly associated with an increased mortality rate
(P = 0.026) and an increased ICU LOS (P = 0.022). Although various studies have presented the predictive role of pro-BNP
among patients with respiratory distress in the past years, our study did not find
BNP to be an accurate predictive and prognostic factor among patients with COVID-19
in our study population. Renal impairment and high Acute Physiology and Chronic Health
Evaluation (APACHE) II scores on admission, on the other hand, have demonstrated to
be strong predictors for COVID-19 morbidity and mortality. This study could represent
an introduction to more prominent multicenter studies to evaluate additional prognostic
factors and minimize the ordering of nonspecific testing.
Keywords
Brain natriuretic peptide - COVID-19 - SARS-CoV-2