The Impact of Hormone Replacement Therapy on the Risk of Heart Failure in Postmenopausal Women: A Meta-Analysis of Clinical and Observational Studies.

Purpose: The relationship between heart failure (HF) and hormone replacement therapy (HRT) in postmenopausal women remains unclear. This paper aimed to elucidate the association between HRT and HF outcomes in postmenopausal women by scrutinizing evidence from clinical trials and observational studies.

Methods: The meta-analysis was systematically executed following the PRISMA guidelines to include studies identified from the electronic databases, including PubMed, EMBASE, EBSCO, ICTRP, and NIH clinical trials. The primary endpoint of the effect comprised risk ratios (RR) for HF incidence and mortality, attended by 95% confidence intervals (CIs). The risk of bias was assessed employing the Cochrane Risk of Bias 2 (RoB2) tool for clinical trials and the Newcastle-Ottawa Scale (NOS) for observational studies.

Results: The search yielded a total of eight reports, originating from six individual studies, for inclusion in the current study, and 25 047 participants were included. The meta-analysis demonstrated no remarkable association between HRT and the incidence of HF in postmenopausal women (RR: 1.07, 95% CI: 0.91-1.25, p = 0.37). However, a significant reduction in all-cause mortality was observed among post-menopausal HF patients who received HRT (RR: 0.65, 95% CI: 0.49-0.87, p = 0.003). In age-related subgroup analyses, no significant change in the risk of HF was noticed among participants on HRT.

Conclusions: The findings of this paper demonstrate that HRT use is not associated with a significant increase in the risk of incident HF. This meta-analysis also suggests a benefit in all-cause mortality when HRT is administered to postmenopausal women with HF.