<prompt> Stenosis of which of the following vessels is associated with the highest patency rates following angioplasty or stenting?Medial circumflex arteryIliac arterySuperficial femoral arteryPopliteal artery  <response>: Angioplasty and stenting of the iliac vessels has a patency rate of 75 at 5 years; PTA and stenting of all other vessels has a much lower patency than bypass procedures. The FDA has only approved illiac artery stenting. 