Gut Microbiome Composition and 1-Year Survival Outcomes among Patients with Reduced Ejection Fraction Heart Failure
Abstract
Abstract Introduction: Imbalances in gut microbiota are linked to chronic diseases, including heart failure, where shifts in microbial composition are evident in patients with reduced ejection fraction (HFrEF). This study compared gut microbiome profiles between HFrEF patients and healthy controls and explored potential links between microbiome composition and patient survival over 6 and 12 months. Methods: In this longitudinal case-control study, 20 HFrEF patients and 40 healthy controls were recruited, with stool samples collected for gut microbiome analysis. Patients were followed for 6 and 12 months to assess survival. Gut microbiome composition was analyzed using real-time PCR for specific bacterial taxa. Statistical analyses were performed using R to compare HFrEF and control groups and draw the ROC curve to predict survival at 6 and 12 months. Results: HFrEF patients showed a significantly lower abundance of all bacterial taxa, except for A. muciniphila. Decreased levels of Prevotella, F. prausnitzii, Firmicutes, and Bacteroidetes, as well as a lower Firmicutes/Bacteroidetes (F/B) ratio, were notable in HFrEF patients, with specific taxa correlating with clinical features like ascites and vitamin D levels. Most bacterial taxa and the F/B ratio could distinguish HFrEF patients from controls, though none effectively predicted survival outcomes at 6 or 12 months. Conclusion: The study demonstrates that patients with HFrEF exhibit a distinct gut microbiome profile…
How strong is the evidence?
Evidence Hub reads this as a case-control, done in people. Its evidence level is 4 of 5 (Low · observational). Observational designs can show an association but not prove cause. Reported size: 20 participants or records.
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