
This study (from Norway) involved more than 1,000 men; nearly half of which had heart attacks. The men ranged in ages from 48 to 77.
During the study it appeared that men who had a history of heart attack were more likely to have had teeth pulled because of infection (because of gum disease, or a tooth infection.)
"When a tooth is extracted because of an infection, the bacteria get into the bloodstream. This is called a "bacteremia." The body's inflammatory response to infections may help lead to increased plaque in arteries near the heart, which can increase risk of heart attack."