In cardiac patients staying in the hospital for more than three weeks, the balance of certain gut bacteria shifts in a consistent pattern over time, with an increase in the ratio of Clostridium cluster XIVa to Bacteroides, suggesting a disruption in gut microbial composition.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether prolonged hospitalization consistently alters the Clostridium/Bacteroides ratio across cardiac populations and whether this change correlates with clinical outcomes like infection or inflammation.
A systematic review and meta-analysis of all longitudinal studies measuring the Clostridium cluster XIVa/Bacteroides ratio in hospitalized cardiac patients over ≥25 days, using standardized qPCR methods, adjusting for antibiotics, diet, and age.
Whether administering probiotics or dietary interventions during prolonged hospitalization can normalize the Clostridium/Bacteroides ratio compared to standard care.
A double-blind RCT of 200 cardiac patients admitted for ≥25 days, randomized to daily probiotic supplementation (10^10 CFU of Lactobacillus and Bifidobacterium) vs. placebo, with stool samples collected at baseline, day 7, day 14, and day 21 to measure the Clostridium/Bacteroides ratio as the primary endpoint.
Whether the magnitude of Clostridium/Bacteroides ratio increase during hospitalization predicts prolonged stay duration after adjusting for antibiotics and nutrition.
A prospective cohort study of 400 cardiac patients with baseline and weekly stool sampling for Clostridium/Bacteroides ratio, adjusting for antibiotic exposure, enteral nutrition, and mobility, to determine if ratio change independently predicts hospital stay ≥25 days.
Whether patients with prolonged hospitalization (≥25 days) have a higher Clostridium/Bacteroides ratio at day 14 than those discharged within 4 days, matched for age and diagnosis.
A case-control study comparing 100 cardiac patients with prolonged hospitalization (≥25 days) and day 14 Clostridium/Bacteroides ratio >0.4 to 100 controls with short stays (≤4 days) and ratio <0.3, matched for age, diagnosis, and antibiotic use.
Whether a single measurement of the Clostridium/Bacteroides ratio at day 14 correlates with hospital stay duration in a single cohort.
A cross-sectional analysis of 300 cardiac patients at day 14 of hospitalization measuring Clostridium/Bacteroides ratio and recording expected discharge date, adjusting for age and diagnosis.