Antibiotic prophylaxis is suggested for patients with cardiac conditions that confer the highest risk of adverse outcome from infective endocarditis. This differs from the guidelines prior to 2007 where a much larger population of patients with moderate risk of infective endocarditis were included in the recommendation.
Here is the summary:
In general, for dental or respiratory tract procedures, oral amoxicillin 2g, 30-60min prior to procedure.
Others may differ.
Patients at highest risk
Prosthetic heart valve
Prior infective endocarditis
Cyanotic congenital heart disease, repaired congenitalheart disease
Valve regurgitation in transplanted heart
Respiratory tract procedures
Skin or soft tissue procedures