Clinical characteristics and long-term outcomes of patients with heart failure with supra-normal ejection fraction: data from LECRA-HF registry

Abstract Background Heart failure with preserved ejection fraction (HFpEF) remains insufficiently characterized subgroup of HF with increasing prevalence and limited treatment options. Relationship between clinically assessed left ventricular ejection fraction (LVEF) and survival showed that LVEF ≥65% is associated with higher mortality. Therefore, a novel category of heart failure with supra-normal left ventricular ejection fraction (HFsnEF) was introduced in 2019. However, clinical characteristics and long-term outcomes of HFsnEF patients remain insufficiently elucidated. Purpose We sought to characterize Polish HFsnEF patients and to provide their long-term mortality in comparison to HFpEF. Methods Of 1186 patients enrolled in the single-center Lesser Poland Cracovian Heart Failure (LECRA-HF) Registry between 2009 and 2019 and hospitalized due to HF decompensation 261 (22%) of them were those with LVEF ≥50%. 40 (15.3%) of them were classified as HFsnEF (LVEF ≥65%) and the remaining 221 (84.7%) as HFpEF. The data including patients’ demography, anthropometric measurements, cardiovascular risk factors, prior cardiological treatment and other comorbidities were collected. The long-term follow-up of all-cause mortality was obtained from the Polish National Death Registry. Results HFsnEF patients were less frequently hypertensive (75 vs 88.2%, P=0.026) and had higher baseline LVEF (65 [65-70] vs 55 [50-60] %, P<0.001) than HFpEF subjects. Furthermore, HFsnEF patients presented lower INR (1.1 [1-1.6] vs 1.3 [1.1-1.9], P=0.027) and total protein level (57 [25-63] vs (65.2 [60.2-69.9] g/L, P=0.008) on admission. HFsnEF patients were less frequently treated on discharge with mineralocorticoid receptor antagonists (25 vs 46.2%, P=0.013) as well as loop diuretics (60 vs 76%, P=0.017). The Kaplan-Meier analysis showed that all-cause mortality is higher in HFsnEF than in HFpEF (65.0 vs 55.2%, P=0.044, Figure 1). The independent predictors of long-term mortality were age and diagnosis of HFsnEF (HR 1.037, 95% CI 1.018-1.056 and HR 1.665, 95% CI 1.063-2.608, respectively). Conclusions Our findings indicate that every seventh Polish patient admitted with HFpEF could be classified as HFsnEF. Baseline characteristics of HFsnEF patients are different than HFpEF. Simultaneously, the HFsnEF diagnosis is associated with lower long-term survival.