The mechanism of dilation with percutaneous transluminal coronary angioplasty (PTCA) is
a. stretching of the vessel wall, resulting in fracture of the plaque.
b. anticoagulation after the completion of the procedure, enhancing dilation.
c. plaque removal after balloon inflation.
d. compression of plaque against the vessel wall.
A
Percutaneous transluminal coronary angioplasty involves the use of a balloon-tipped catheter that, when advanced through an atherosclerotic lesion (atheroma), can be inflated intermittently for the purpose of dilating the stenotic area and improving blood flow through it. The high balloon-inflation pressure stretches the vessel wall, fractures the plaque, and enlarges the vessel lumen.
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