What does angioplasty involve?

Angioplasty involves the surgical repair or dilation of a narrowed or blocked blood vessel, typically an artery. This procedure is commonly performed using a catheter with a balloon at its tip, which is inserted into the affected blood vessel. Once in position, the balloon is inflated to widen the vessel, allowing for improved blood flow. Along with the dilation process, a stent may often be placed to help keep the artery open and reduce the chances of re-blockage, but the primary definition of angioplasty refers to the act of repairing or enlarging the vessel itself. The focus in this context is on the repair aspect, which aligns with the correct choice provided.