A Patient Is Considering Valve Replacement Surgery

A patient is considering valve replacement surgery. The nurse would explain which main differences between biological and mechanical valves?. Select all that apply.

A) Biological valves have a higher incidence of clot formation than do mechanical valves.
B) Biological valves wear out faster than mechanical valves.
C) Mechanical valves sometimes have an audible click.
D) Infections are harder to treat in mechanical valves.
E) There is a higher risk of hemorrhage in the years after surgery if a biologic valve is used.