29/11/2025
A new study from Hiroshima University finds that the gum-disease bacterium Porphyromonas gingivalis (P. gingivalis) can slip into the bloodstream and infiltrate the heart. There, it quietly drives scar tissue buildup — known as fibrosis — distorting the heart’s architecture, disrupting electrical signals, and raising the risk of Atrial Fibrillation (AFib).
Researchers studied both animal models and human atrial tissue. Mice with P. gingivalis showed significantly higher incidence of inducible AFib compared with controls. In human heart tissue from AFib patients, presence of P. gingivalis correlated with more severe gum disease — suggesting a possible microbial link beyond inflammation alone.
For everyday oral-health practice, this reinforces that untreated periodontitis might not only threaten your gums and teeth — it may also pose broader cardiovascular risks. It’s a reminder that oral hygiene and periodontal care are key to whole-body health.
📄Research paper:
Shunsuke Miyauchi, Miki Kawada-Matsuo, Hisako Furusho, et al. Atrial Translocation of Porphyromonas gingivalis Exacerbates Atrial Fibrosis and Atrial Fibrillation. Circulation, 2025; DOI: 10.1161/CIRCULATIONAHA.124.071310