A patient is scheduled for cardiac surgery for placement of a mechanical valve. Which patient statement indicates correct understanding of characteristics of mechanical valves used for cardiac valve replacement? (Select all that apply.)
a. "They are durable."
b. "They require donors."
c. "They create turbulent blood flow."
d. "They can be placed during balloon angioplasty."
e. "They do not require lifelong anticoagulant therapy."
f. "They may be preferred if anticoagulation is a concern."
ANS: A, C
Mechanical valves, which are man-made, create turbulent blood flow so they require lifelong anticoagulation, but they are the most durable. Valves can be dilated via percutaneous balloon procedures in less severe cases, but artificial valves are not placed this way.
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