The Claim
Bacterial DNA was detected in the aortic valves of 37.5% (12 of 32) of patients with severe aortic stenosis or regurgitation undergoing valve replacement, indicating that microbial colonization of diseased valves occurs in a substantial subset of patients but is not universal.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In patients with severe aortic valve disease who underwent surgery, bacterial DNA was found in the removed valves of about one-third of cases, showing that microbial presence in these valves occurs in a significant number of patients but not in all.
See the scientific wording
Bacterial DNA was detected in the aortic valves of 37.5% (12 of 32) of patients with severe aortic stenosis or regurgitation undergoing valve replacement, indicating that microbial colonization of diseased valves is not universal but occurs in a substantial subset of patients.
Bad bacteria in the mouth enter the bloodstream through inflamed gum tissue, travel to the heart, and stick to damaged heart valves where they survive and trigger inflammation that worsens valve disease.
What the research says
1 studyStudy: Oral Dysbiosis Is Associated with the Pathogenesis of Aortic Valve Diseases
Scientists found traces of bacteria in the heart valves of about one-third of patients who had bad heart valves removed, and those bacteria matched ones from their mouths — meaning germs from the mouth might travel to the heart and stick to damaged valves.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
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