Medical Emergencies · single question
The same patient with a prosthetic mitral valve and childhood rheumatic fever. What antibiotic prophylaxis is indicated before invasive dental procedures?
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Correct answer: A. Amoxicillin 2 g orally 1 hour before the procedure
- A. Correct. A prosthetic heart valve is a high-risk cardiac condition requiring infective-endocarditis prophylaxis: amoxicillin 2 g orally one hour before procedures that manipulate gingiva/periapical tissue.
- B. Prophylaxis IS needed — prosthetic valves are a primary indication.
- C. Clindamycin is the alternative for penicillin allergy, but the standard dose is 600 mg (not 300 mg), so this option is incorrect for a non-allergic patient.
- D. Waiting for signs of infection defeats the purpose of pre-procedural prophylaxis.
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