What is a peripheral arterial disease?
Peripheral arterial diseases occur in various forms that damage the arteries, which deliver blood from the heart throughout the body. The most common types of peripheral arterial disease include blood clots or calcium that block blood flow and prevent oxygen from reaching tissue. This can cause pain, sores, or even dead tissue that can lead to strokes and heart attacks.
Some patients experience pain or heaviness in their legs while walking, which prevents them from enjoying their lives. But only a small number of people will experience these more extreme and painful symptoms.
A physician can perform a physical exam to determine whether a patient has peripheral arterial disease, including measuring blood pressure or performing an ultrasound or an MRI.
During angioplasty (left), the interventional radiologist guides a catheter with a tiny balloon tip through the blood vessels into the blockage. The balloon is inflated to widen the artery, which restores blood flow. Sometimes the doctor will place a stent (a tiny mesh tube) in the artery to help keep it open. See Stenting, below.
Stenting uses small metal tubes to hold open narrowed arteries that are closing. Various types of stents are used, including two main categories: bare metal and drug-eluting.
⦁ Bare metal stents: These are made of simple metal mesh, which allows the body to coat the stent with cells that prevent new blood clots from forming; however, this approach increases the chance that the artery may become narrowed by scar tissue.
⦁ Drug-eluting stents: These are more modern and slowly administer medication to the blood vessel wall to prevent scar formation; but the medication also stops the body from coating the stent with protective cells that prevent new blood clots from forming.
Patients who receive stents also need to be on clot-preventing medications related to aspirin called “anti-platelets” that reduce the chance of clots forming inside the stent.