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  • Angioplasty And Stent Placement - Carotid Artery
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Angioplasty And Stent Placement - Carotid Artery

The blood vessels that bring blood to your brain and face are called the carotid arteries. You have a carotid artery on each side of your neck.

The blood flow in this artery can become partly or totally blocked by fatty material called plaque. A partial blockage is called carotid artery stenosis (narrowing). A blockage in your carotid artery can reduce the blood supply to your brain. Sometimes part of a plaque can break off and block off another artery. A stroke can occur if your brain does not get enough blood.

Two procedures can be used to treat a carotid artery that is narrowed or blocked. These are:

  • Surgery to remove plaque buildup (endarterectomy)
  • Carotid angioplasty with stent placement
The build-up of plaque in the internal carotid artery may lead to narrowing and irregularity of the artery's lumen, preventing proper blood flow to the brain. More commonly, as the narrowing worsens, pieces of plaque in the internal carotid artery can break free, travel to the brain and block blood vessels that supply blood to the brain. This leads to stroke, with possible paralysis or other deficits.

Alternative Names

Carotid angioplasty and stenting; CAS; Angioplasty - carotid artery; Carotid artery stenosis - angioplasty;

Description

Carotid angioplasty and stenting (CAS) is done using a small surgical cut.

  • Your surgeon will make a surgical cut in your groin after using some numbing medicine. You will also be given medicine to relax you.
  • The surgeon places a catheter (a flexible tube) through the cut into an artery. It is carefully moved up to your neck to the blockage in your carotid artery. Moving x-ray pictures (fluoroscopy) are used to see the artery and guide the catheter to the correct position.
  • Next, the surgeon will move a wire through the catheter to the blockage. Another catheter with a very small balloon on the end will be pushed over this wire and into the blockage. Then the balloon is inflated.
  • The balloon presses against the inside wall of your artery. This opens the artery and allows more blood to flow to your brain. A stent (a wire mesh tube) may also be placed in the blocked area. The stent is inserted at the same time as the balloon catheter. It expands with the balloon. The stent is left in place to help keep the artery open.
  • The surgeon then removes the balloon.
If you have a blocked artery in your heart, legs, or neck, you may need a stent to keep your blood flowing to prevent serious problems. Let’s talk today about stents.A stent is a tiny tube we place in an artery, blood vessel, or other duct (such as the one that carries urine) to hold the tubes open. A stent is left in permanently. Most stents are made of metal or plastic mesh-like material. Stent grafts made of fabric are often used in larger arteries. Stents are used to treat a variety of artery and other problems. Your doctor will make a small cut in a blood vessel in your groin and thread a thin, flexible tube called a catheter to the place in your body where you need a stent.In the heart, a fatty substance called plaque can build up inside the coronary arteries. Plaque narrows the arteries, reducing the flow of oxygen-rich blood to the heart. One stent, called an intraluminal coronary artery stent, is a small, self-expanding, metal mesh-like tube that is placed inside a coronary artery after balloon angiography. This stent prevents the artery from re-closing. Another stent is coated with medicine that helps further prevent an artery from re-closing.In the carotid arteries, which are on both sides of your neck, plaque can build up and slow the flow of blood to your brain. Stents can keep the carotid arteries open. Stents can also open up narrow arteries in your legs caused by peripheral arteriole disease. They’re also used to treat an abdominal aortic aneurysm, which is when the large blood vessel that supplies blood to your abdomen, pelvis, and legs becomes abnormally large and balloons. After a stent procedure, your doctor will probably recommend that you take aspirin and another anti-clotting medication to prevent blood clots from forming in the stent. Make sure that you talk to your doctor, before getting a stent, about the risks associated with placing a stent to treat your condition, such as tissue growing around the area where the stent was placed.

Open Article Detail

Why the Procedure is Performed

Carotid surgery (endarterectomy) is an older and effective way to treat narrowed or blocked arteries. This procedure is very safe.

CAS has developed as a good alternative to surgery, when done by experienced operators. Certain factors may favor stenting, such as:

  • The person is too ill to have carotid endarterectomy.
  • The location of the narrowing in the carotid artery makes surgery harder.
  • The person has had neck or carotid surgery in the past.
  • The person has had radiation to the neck.

Risks

Risks of carotid angioplasty and stent placement, which depend on factors such as age, are:

  • Allergic reaction to dye
  • Blood clots or bleeding at the site of surgery
  • Brain damage
  • Clogging of the inside of the stent (in-stent restenosis)
  • Heart attack
  • Kidney failure (higher risk in people who already have kidney problems)
  • More blockage of the carotid artery over time
  • Seizures (this is rare)
  • Stroke

Before the Procedure

Your health care provider will do a physical exam and perform several medical tests.

Always tell your provider what drugs you are taking, even drugs, supplements, or herbs you bought without a prescription.

During the 2 weeks before your procedure:

  • Days before the surgery, you may have to stop taking drugs that make it harder for your blood to clot. These include aspirin, ibuprofen (Advil, Motrin), clopidogrel (Plavix), ticagrelor (Brilinta), prasugrel (Effient) naprosyn (Aleve, Naproxen), and other drugs like these.
  • Ask your provider which drugs you should still take on the day of your surgery.
  • If you smoke, you need to stop. Ask your provider for help quitting.
  • Always let your provider know about any cold, flu, fever, herpes breakout, or other illness you may have before your surgery.

DO NOT drink anything after midnight the night before your surgery, including water.

On the day of your surgery:

  • Take the drugs you have been told you to take with a small sip of water.
  • You will be told when to arrive at the hospital.

After the Procedure

After surgery, you may need to stay in the hospital overnight so that you can be watched for any signs of bleeding, stroke, or poor blood flow to your brain. You may be able to go home the same day if your procedure is done early in the day and you are doing well. Your provider will talk to you about how to care for yourself at home.

Outlook (Prognosis)

Carotid artery angioplasty and stenting may help lower your chance of having a stroke. But you will need to make lifestyle changes to help prevent plaque buildup, blood clots, and other problems in your carotid arteries over time. You may need to change your diet and start an exercise program if your provider tells you exercise is safe for you.

Cholesterol is a waxy,  fat-like material that is found in all parts of the body. It comes from two sources: our liver produces it, and we consume it in meat and dairy products.

References

Amarenco P, Labreuche J, Mazighi M: Lessons from carotid endarterectomy and stenting trials. Lancet. 2010;376(9746):1028-1031. PMID: 20870079 www.ncbi.nlm.nih.gov/pubmed/20870079.

Brott TG, Halperin JL, Abbara S, et al. 2011 ASA/ACCF/AHA/AANN/AANS/ACR/ASNR/CNS/SAIP/SCAI/SIR/SNIS/SVM/SVS guideline on the management of patients with extracranial carotid and vertebral artery disease. J Am Coll Cardiol. 2013;81(1)E76-E123. PMID: 23281092 www.ncbi.nlm.nih.gov/pubmed/23281092.

Brott TG, Hobson RW, Howard G, et al: Stenting versus endarterectomy for treatment of carotid-arery stenosis. N Engl J Med. 2010;363(1):11-23. PMID: 20505173 www.ncbi.nlm.nih.gov/pubmed/20505173.

Brott TG, Howard G, Roubin GS, et al. Long-term results of stenting versus endarterectomy for carotid-artery stenosis. N Engl J Med. 2016;374(11):1021-1031. PMID: 26890472 www.ncbi.nlm.nih.gov/pubmed/26890472.

Gurm HS, Yadav JS, Fayad P, et al: Long-term results of carotid stenting versus endarterectomy in high-risk patients. N Engl J Med. 2008;358(15):1572-1579. PMID: 18403765 www.ncbi.nlm.nih.gov/pubmed/18403765.

Kinlay S, Bhatt DL. Treatment of noncoronary obstructive vascular disease. In: Mann DL, Zipes DP, Libby P, Bonow RO, Braunwald E, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 10th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 60.

Rosenfield K, Matsumura JS, Chaturvedi S, et al. Randomized trial of stent versus surgery for asymptomatic carotid stenosis. N Engl J Med. 2016;374(11):1011-1020. PMID: 26886419 www.ncbi.nlm.nih.gov/pubmed/26886419.

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