Cardiac conditions prophylaxis for endocarditis

For what cardiac conditions prophylaxis for endocarditis is NOT recommended in patients receiving dental care? 

a. Prosthetic cardiac valves 
b. Previous bacterial endocarditis
c. Previous coronary artery bypass graft surgery 
d. Surgically constructed systemic pulmonary shunts or 
conduits

The correct answer is C: Cardiac conditions that do not require endocarditis prophylaxis

• Isolated secundum atrial septal defect

• Surgical repair of atrial septal defect, ventricular septal defect, or patent ductus arteriosus (without residua beyond 6 months)

• Previous coronary artery bypass graft surgery

• Mitral valve prolapse without valvular regurgitation

• Physiologic, functional, or innocent heart murmurs

• Previous Kawasaki disease without valvular regurgitation