# Clinical outcomes of pharmacological therapies for heart failure in Black vs. White populations: a meta-analysis of randomized controlled trials of heart failure treatment

## TL;DR

This study compares how heart failure treatments affect Black and White patients, finding some drugs work better for one group than the other.

## Contribution

The study is the first to meta-analyze race-specific treatment effects of heart failure drugs using randomized controlled trials.

## Key findings

- SGLT2 inhibitors reduced heart failure hospitalization more in Black patients than White patients.
- Beta-blockers showed better mortality benefits for White patients compared to Black patients.
- Most heart failure drugs had similar effects across Black and White populations.

## Abstract

To evaluate the effect of different pharmacological therapies for heart failure (HF) between the Black vs. White population.

We included randomized controlled trials (RCT) of HF pharmacological therapies with explicit strata of Black or White adults in the primary or secondary analysis. We examined three outcomes: (1) the composite of CV death or hospitalization for heart failure (HHF), (2) HHF, and (3) all-cause death. Within each race (White and Black), we calculated the pooled risk ratio (RR) with a 95% confidence interval (CI) of different pharmacological therapies using random-effects models. Within each pharmacological therapies, we assess the differences in the treatment effect by race.

In 19 RCT reporting eight pharmacological therapies, there was no significant difference between the Black and White groups for using sacubitril/valsartan, angiotensin-converting enzyme inhibitors, calcium-channel blockers, direct renin inhibitors, oral soluble guanylate cyclase, or vasodilators. Sodium-glucose cotransporter-2 inhibitors (SGLT2i) had a different effect in HHF across the White and Black patients (Pinteraction = .030), with a better treatment effect observed in the Black (RR 0.39, 95% CI 0.19–0.80) compared to the White group (0.90, 0.71–1.14). Beta-blockers had a better treatment effect in the White (0.65, 0.52–0.81) compared to the Black group (1.14, 0.88–1.47) regarding the all-cause death outcome (Pinteraction = .001).

Black individuals with HF appeared to obtain a greater benefit of HHF risk reduction from SGLT2i and less benefit for mortality from beta-blockers compared to their White counterparts.