Abstract

Abstract Objective This study aims to investigate the guideline adherence and prognostic role of guideline recommended heart failure (HF) therapies in patients hospitalized with heart failure with mildly reduced ejection fraction (HFmrEF). Background Limited data regarding the guideline adherence and prognostic impact of different pharmacotherapies in patients with HFmrEF is available. Methods A large retrospective study was used including all consecutive hospitalized patients with HFmrEF (i.e., left ventricular ejection fraction (LVEF) 41 – 49%) from 2016 to 2022 according to current European guidelines. The prescription rates and the prognostic role of angiotensin-converting enzyme and receptor blockers (ACEi/ARB), beta-blockers (BB), mineralocorticoid receptor antagonists (MRA), sodium glucose linked transporter 2 inhibitors (SGLT2i) and angiotensin receptor-neprilysin inhibitor"(ARNi) was assessed. The primary endpoint was the first heart-failure related re-hospitalization at 3 years. Secondary endpoints comprised amongst others cardiovascular re-hospitalization. Kaplan-Meier, uni- and multivariable Cox regression analyses were applied for statistics. Results 775 consecutive patients with HFmrEF surviving index hospitalization were included. Of those, 73% were discharged on ACEi/ARB, followed by BB (26%), 14% MRA, whereas only minor part was treated with SGLT2i (3%). In HFmrEF patients, no prognostic impact of BB (10% vs. 7%; log rank p=0.218; HR=1.474; 95% CI 0.792-2.742; p=0.220), ACEi/ARB (9% vs. 10%; log rank p=0.444; HR=0.822; 95% CI 0.497-1.359; p=0.445), SGLT2i (8% vs. 9%; log rank p=0.821; HR=0.851; 95% CI 0.209-3.470; p=0.445), MRA (8% vs. 9%; log rank p=0.748; HR=0.892; 95% CI 0.443-1.794; p=0.748) regarding the risk of heart-failure related re-hospitalization at 3 years was observed. In line, these pharmacotherapies were not associated with the risk of cardiovascular re-hospitalization. Conclusions In patients hospitalized with HFmrEF between 2016 and 2022, only infrequent treatment with guideline recommended HF therapies was observed, whereas non of the current HF therapies was associated with the risk of heart-failure related rehospitalization.

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