Because of your valvular heart condition you are at an increased risk for a heart valve infection called bacterial endocarditis. Bacterial endocarditis can occur whenever bacteria enters your bloodstream and attaches to your abnormal valve. The more abnormal your valve, the greater the risk of endocarditis.
Bacteria can enter the bloodstream during surgical procedures or dental work.
Even minor surgery or teeth cleaning can allow bacterial invasion of the blood. In normal health, your body's defenses combat bacteria, but in the presence of valvular heart disease, the bacteria can hide and grow on your heart valve. Procedures such as endoscopies can also increase the risk of bacterial endocarditis. Endocarditis can be prevented by the administration of antibiotics immediately before and after the procedure. Usually, oral medication is sufficient, but in some situations intravenous antibiotics are required.