What is the general policy on antibiotic prophylaxis for PCI?

• A. Routine antibiotic prophylaxis for all PCI
• B. Prophylaxis is mandatory for all vascular access
• C. Prophylaxis is not routinely recommended unless infection risk such as prosthetic valves
• D. Prophylaxis should be given only if patient has prior endocarditis

Answer: (C)

Antibiotic prophylaxis around PCI is not given to every patient. The reason is that PCI carries a relatively low risk of causing endocarditis through transient bacteremia, and studies haven’t shown a clear benefit from routine antibiotics in this setting. Because of that, guidelines reserve prophylaxis for those with a higher risk of infection affecting the heart.

In practice, this means prophylaxis is considered for patients with conditions that raise endocarditis risk, such as the presence of a prosthetic heart valve or a history of endocarditis, and sometimes other high-risk congenital heart diseases. These scenarios imply a greater likelihood that bacteremia could lead to serious infection, so the potential benefits of antibiotics outweigh the risks.

That’s why the best choice states that prophylaxis is not routinely recommended unless there is an infection risk like a prosthetic valve. The other options imply universal or mandatory prophylaxis or restrict it to a single scenario, which doesn’t align with how endocarditis risk is assessed in PCI patients.