Patients with chronic kidney disease (CKD) are at higher risk for heart failure. The hypoxia inducible factor prolyl hydroxylase inhibitor daprodustat is an orally acting alternative to conventional injectable erythropoietin-stimulating agents (ESA) for the treatment of anemia in patients with CKD. Whether daprodustat affects the risk of heart failure hospitalization is unknown.

The ASCEND-D (n=2,964) and ASCEND-ND (n=3,872) trials compared daprodustat to conventional ESA in patients with anemia of CKD who did or did not require dialysis, respectively. We identified risk factors for heart failure hospitalization and assessed the effect of daprodustat compared to conventional ESA on heart failure hospitalizations.

History of heart failure, diabetes, and higher systolic blood pressure were independently associated with heart failure hospitalization in both trials, irrespective of treatment assignment. The number of first heart failure hospitalizations was greater in the daprodustat arm in patients not receiving dialysis (hazard ratio [HR] 1.22 [0.95-1.56], p=0.12] and in patients receiving dialysis (HR 1.10 [0.84-1.45], p=0.47), though these differences were not statistically significant. HRs in patients with and without history of heart failure were 1.37 (0.89-2.11) vs 1.08 (0.79-1.46) (p-interaction=0.36) in ASCEND-ND, and 1.52 (0.97-2.38) vs 0.93 (0.66-1.30) (p-interaction=0.09) in ASCEND-D, respectively. In post hoc analyses, daprodustat increased total (first and recurrent) heart failure hospitalizations in participants not receiving dialysis (rate ratio 1.46 [1.11-1.92], p=0.007) ) but not in participants receiving dialysis (rate ratio 1.01 [0.74-1.39], p=0.93). Daprodustat did not significantly affect the risk of a composite outcome of first heart failure hospitalization or death.

A greater number of first heart failure hospitalization events occurred in patients treated with daprodustat compared with conventional ESA, but this difference did not reach statistical significance. Differences in the number of heart failure hospitalization events were most apparent in patients not receiving dialysis and in patients with history of heart failure.