The prognostic effect of hyponatraemia in determining mortality in patients with heart failure hospitalised in AL-Yarmouk Teaching Hospital.

Objective: To assess the prognostic effect of hyponatraemia in determining mortality in patients with heart failure.

Methods: The prospective observational study was conducted at the Internal Medicine Unit of Al-Yarmouk Teaching Hospital, Baghdad, Iraq, from September 1, 2019, to February 1, 2020, and comprised adult patients of either gender who were hospitalised due to heart failure and left ventricular ejection fraction <49% at admission. The endpoint was inpatient mortality from the index hospitalisation for decompensated heart failure according to the serum sodium levels.