Blockages in the arm and leg arteries are sometimes caused by blood clots (thrombi). These clots narrow the width of the artery and either reduce or prevent blood flow beyond the blockage. This may cause symptoms in the arms and legs such as numbness, tingling, pallor, pain and non-healing ulcers.
Blood clots can be treated with clot-busting drugs called anti-thrombolytics and instruments designed to extract the clot. A catheter is placed inside the artery near the clot to perform this procedure.