Prognostic Applications of Current Clinical Scores in Heart Failure with Preserved Ejection Fraction: A Prospective Cohort Study.

Background: The H2FPEF and HFA-PEFF scores were developed to support the diagnosis of heart failure with preserved ejection fraction (HFpEF) and may also help predict cardiovascular outcomes.

Objective: To assess the prognostic value of these scores in a cohort of individuals with HFpEF.

Methods: This prospective study was conducted at a tertiary hospital in Brazil between March 2019 and December 2021. After clinical evaluation, echocardiography, and exercise testing, the H2FPEF and HFA-PEFF scores were calculated. Patients were classified into intermediate probability groups (H2FPEF: 2-5 points; HFA-PEFF: 2-4 points) and high probability groups (H2FPEF >5 points; HFA-PEFF >4 points). The primary outcome was a composite of all-cause mortality and hospitalizations due to HFpEF. Statistical significance was set at p<0.05.

Results: A total of 103 patients were followed for an average of 888 days (±291). The mean age was 69 years (±8.3), and 61% were women. Twenty-seven patients (26.2%) experienced primary outcomes, totaling 32 events-11 deaths and 21 hospitalizations due to HFpEF. In the receiver operating characteristic (ROC) curve analysis, the H2FPEF score showed better predictive ability for the outcomes (area under the curve [AUC]: 0.637, 95% CI: 0.518-0.756, p=0.035) compared to the HFA-PEFF score (AUC: 0.572, 95% CI: 0.448-0.696, p=0.270). In the Kaplan-Meier analysis, high-probability classification by both scores was significantly associated with the occurrence of outcomes (log-rank p=0.034), compared to the intermediate score group or patients with differing classifications between the two scores.

Conclusions: The H2FPEF score showed better performance than the HFA-PEFF score in predicting outcomes in patients with HFpEF. Findings from this contemporary study conducted in Brazil contribute to risk stratification in clinical practice.