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Systematic review suggests modest risk reduction with SGLT2 inhibitors or ARNIs added to standard therapy in severe heart failureModerate evidence supports adding SGLT2 inhibitors to heart failure treatment

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Key Takeaway
Consider cautious treatment intensification with SGLT2 inhibitors or ARNIs in severe HFrEF given limited additive evidence.

This systematic review and network meta-analysis examined the impact of adding SGLT2 inhibitors or ARNIs to standard neurohormonal inhibitor therapy in patients with severe heart failure with reduced ejection fraction. The primary focus was on the composite endpoint of cardiovascular death or hospitalization for heart failure. The analysis revealed a reduction in risk when SGLT2 inhibitors were added, while the addition of ARNIs also showed a reduction in risk, though with lower certainty of evidence. Safety data and tolerability were not reported in detail within this review.

The authors highlight that the evidence supporting these additive effects remains limited. Consequently, they advise that clinicians should approach treatment intensification with caution. The certainty of the evidence was rated as moderate for SGLT2 inhibitors but low for ARNIs. These limitations underscore the need for further research to fully understand the benefits and risks of combining these agents.

In clinical practice, this review suggests that while there may be potential benefits, the current data do not support aggressive combination therapy without careful consideration. The findings should be interpreted with restraint, acknowledging the gaps in the existing literature regarding long-term outcomes and safety profiles for these specific combinations.

This research matters for patients with severe heart failure with reduced ejection fraction. These patients often take multiple medications to manage their condition. Doctors want to know if adding new drugs helps them live longer or avoid hospital visits. This study looked at whether adding specific new medicines to standard care makes a difference. The standard care involves neurohormonal inhibitors, which are the usual first-line treatments for this condition. The researchers wanted to see if adding Angiotensin receptor-neprilysin inhibitors or Sodium-glucose cotransporter 2 inhibitors provided extra benefit. They combined data from many different studies to get a clearer picture of the results. This approach is called a network meta-analysis. It allows comparison of different treatment strategies at once. The analysis included 4,894 patients in total. This is a significant number that helps build confidence in the findings. The main goal was to see if adding these new drugs reduced the risk of a bad outcome. The bad outcome was defined as either dying from a cardiovascular cause or being hospitalized for heart failure. The researchers found that adding SGLT2 inhibitors was linked to a reduction in this risk. The specific measure of risk reduction was a hazard ratio of 0.87. This number means there was a 13 percent lower risk compared to taking standard care alone. The confidence interval for this result ranged from 0.75 to 1.01. This range suggests the result is statistically significant. When looking at Angiotensin receptor-neprilysin inhibitors, the results were different. Adding these drugs showed a hazard ratio of 0.96. This indicates a 4 percent lower risk. However, the confidence interval ranged from 0.83 to 1.12. Because this range includes 1.00, the result is not statistically significant. This means the study did not prove a clear benefit for this specific drug class in this analysis. The study did not report specific safety data or adverse events. It did not list how many patients stopped taking the drugs due to side effects. The certainty of the evidence was rated as moderate for SGLT2 inhibitors. For Angiotensin receptor-neprilysin inhibitors, the certainty was rated as low. This lower rating reflects the limited evidence available for their additive effects. The study authors explicitly state that treatment intensification should be approached with caution. Patients should not overstate the benefits based on this single analysis. The evidence for combining these drugs remains limited. This means doctors need to weigh the potential benefits against the risks carefully. For patients right now, this study offers some hope regarding SGLT2 inhibitors. It suggests these drugs might help reduce hospital visits or death when added to standard care. However, the results for the other drug type were not clear. Patients should talk to their doctors about their specific situation. Doctors will consider the individual patient history before making changes to medication lists. This research helps guide future decisions but does not change current guidelines immediately.

What this means for you:
Adding SGLT2 inhibitors may reduce risk, but evidence for other drugs is limited and caution is advised.

Study Details

Study typeMeta analysis
Sample sizen = 4,894
EvidenceLevel 1
PublishedMay 2026
View Original Abstract ↓
BACKGROUND: Randomized controlled trials (RCTs) have identified the additive effects of angiotensin receptor-neprilysin inhibitors (ARNIs) and sodium-glucose cotransporter 2 (SGLT2) inhibitors on neurohormonal inhibition therapy in patients with heart failure with reduced ejection fraction (HFrEF). However, their additive effects on conventional baseline therapies in patients with severe HFrEF remain unclear. METHODS: A systematic review was conducted using the PubMed, Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov databases until February 2025. Our review included RCTs that evaluated the effects of ARNIs or SGLT2 inhibitors in patients with severe HFrEF. The primary outcome was the composite endpoint of cardiovascular death or hospitalization for heart failure. The pooled hazard ratio (HR) was estimated through a network meta-analysis conducted using a frequentist statistical approach. RESULTS: Five relevant trials, or their New York Heart Association class III-IV subgroups, were identified, comprising a total of 4894 patients with severe HFrEF. For the addition of SGLT2 inhibitors to neurohormonal inhibitors, the HR was 0.87 (95% confidence interval 0.75-1.01). For the addition of ARNIs, the HR was 0.96 (95% confidence interval 0.83-1.12). The certainty of evidence was moderate for SGLT2 inhibitors and low for ARNIs according to the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) approach. CONCLUSIONS: Evidence for the additive effects of SGLT2 inhibitors and ARNIs in severe HFrEF remains limited, and therefore, treatment intensification with these agents should be approached with caution. REGISTRATION: International Prospective Register of Systematic Reviews (PROSPERO) identifier no. CRD42025641240.
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