Gum Disease Linked to Heart Valve Hardening

A recent study presented at the American Heart Association's Basic Cardiovascular Sciences Scientific Sessions 2026 has identified a connection between periodontitis and calcific aortic valve stenosis (CAVS). Periodontitis, a severe inflammatory gum disease, affects an estimated 1 billion people worldwide and can lead to bacteria spreading throughout the body via the bloodstream.

Researchers investigated this link using human heart tissue and a mouse model. They discovered that the bacteria responsible for periodontitis, Porphyromonas gingivalis (P. gingivalis), can accumulate in aortic valves. In mice, repeated exposure led to increased valve calcification and symptoms mimicking CAVS.

While the study was conducted on animal models, the findings suggest that infection-related inflammation could be a target for future therapies. Scientists plan to validate these results in larger human studies and explore interventions for inflammation signaling pathways.

Cardiologists note that this research aligns with the broader understanding of inflammation's role in cardiovascular disease. It underscores the importance of oral health, suggesting that gum disease could be a contributing factor to valve conditions, an area with less established preventive guidance compared to heart attacks or strokes.