Which patient population requires antibiotic prophylaxis before dental procedures due to endocarditis risk?

• A. People with artificial valves
• B. People with hypertension
• C. People with hyperlipidemia
• D. People with diabetes

Answer: (A)

Antibiotic prophylaxis before dental procedures is used to prevent infective endocarditis in patients who are at highest risk for seeding of heart tissue with oral bacteria during a procedure that can cause bleeding. The key idea is that prosthetic or artificial heart valves provide a surface where bacteria can adhere and form infections if bacteria enter the bloodstream during dental work. In those with artificial valves, giving a dose of antibiotics before the procedure helps reduce the chance that oral bacteria cause endocarditis on the prosthetic material.

Hypertension, hyperlipidemia, and diabetes do not, by themselves, create the same high-risk scenario for endocarditis that would warrant prophylaxis before dental procedures under standard guidelines. Therefore, they are not indications for antibiotic prophylaxis in this setting.