ADDition of DAPAgliflozin, Sodium-Glucose Cotransporter-2 Inhibitor to Angiotensin Receptor Blocker-Neprilysin Inhibitors Non-Responders in Patient with Refractory Heart Failure with Reduced Ejection Fraction (ADD DAPA trial)

OBJECTIVES: We evaluated the efficacy and safety of dapagliflozin, a SGLT2i along with ARNI in refractory HFrEF irrespective of their diabetic status. METHODS: We performed a retrospective analysis of 104 symptomatic patients of HFrEF despite of optimal medical management with ARNI between January–June 2020. Despite the optimal GDMT, dapagliflozin, SGLT2i was added inpatients withrefractory heart failure. At 6-months follow-up, the primary outcome was change in left ventricular ejection fraction, and secondary outcomes included changes in NYHA functional class, vital parameters, renal function, potassium levels, and NT-pro BNP levels. RESULTS: The primary outcomeat 6-months follow-up was a mean change in left ventricular ejection fraction (LVEF) +9.00 ± 0.62 (p < 0.001). The secondary outcome was a significant improvement (69%) in median NYHA functional class by 2.3 (95% Confidence interval 2.245–2.355) with 92.6% of patients were in NYHA class I and 7.4% were in NYHA class II.Diabetic subgroup reached the HbA1C goal of <7%. None of them had either symptomatic hypotension, hypoglycaemia, dyselectrolaemia, and decline in renal function. The drug was well received by most of the patients. CONCLUSIONS: Dapagliflozin, an SGLT2i, should be used in symptomatic, refractory HFrEF patients despite the use of ARNI. The combination of ARNI and SGLT2i is well tolerated, but large, randomized trials are needed to prove this hypothesis.