Daijiworld Media Network – Helsinki

Helsinki, Sep 9: A recent study by scientists in Finland and the United Kingdom indicates that heart attacks may not be caused solely by high cholesterol or lifestyle factors, but could also be triggered by hidden bacterial infections.

Led by Professor Pekka Karhunen, the research found that dormant bacteria within biofilms inside artery plaques can be activated by viral infections or external triggers. Once activated, these bacteria multiply and cause inflammation, potentially weakening or rupturing the fibrous cap of plaques, which can lead to blood clots and myocardial infarctions.

The study involved tissue samples from patients who died of sudden cardiac death and from those undergoing surgery for atherosclerosis. Analysis revealed DNA from several oral bacteria within atherosclerotic plaques. Using targeted antibodies, researchers observed biofilm structures and bacterial activity linked to inflammation and plaque rupture.

While these findings highlight a new possible cause of heart attacks, the researchers stressed that traditional risk factors such as high cholesterol, smoking, and hypertension remain critical and must be managed to reduce the risk of heart disease.