All of the following are true pertaining to coronary bypass surgery except:
A) it can only be done after a coronary angioplasty procedure.
B) a segment of the saphenous vein is often used to bypass the obstructed segment of the affected coronary artery.
C) the internal thoracic artery may be used to directly supply the distal segment of a coronary artery.
D) it is done in cases of coronary artery stenosis.
E) when a vein is used to shunt the blood around the obstructed segment, it has to be reversed so that the valves do not impede the flow of blood.
Ans: A
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