A stent procedure is a minimally invasive treatment where a doctor threads a tiny mesh tube into a blocked or narrowed artery to hold it open and restore blood flow. The procedure most commonly targets the heart’s coronary arteries, though stents are also placed in neck arteries, leg arteries, and even the esophagus. Most people go home the same day or the next morning, and the procedure itself typically takes about an hour.
How the Procedure Works
You’re awake during a stent procedure but sedated, so you feel calm and don’t experience pain. Your cardiologist starts by making a small access point, usually through a blood vessel in your wrist or at the top of your thigh. A thin, flexible tube called a catheter is guided through that blood vessel all the way to your heart.
Once the catheter reaches the blocked artery, the doctor injects a contrast dye and uses real-time X-ray imaging to see exactly where the narrowing is. A small balloon at the tip of the catheter inflates to push the plaque against the artery wall, widening the passage. The stent, a small expandable mesh tube, is then placed at that spot to act like scaffolding, keeping the artery propped open permanently. After the stent is deployed, the catheter is removed and the insertion site is closed with a compression bandage, a small stitch, or a collagen plug depending on where the access point was.
Why Stents Are Needed
Arteries narrow over time as fatty deposits called plaque build up along their walls. When a coronary artery becomes severely blocked, less blood reaches the heart muscle, causing chest pain, shortness of breath, or in serious cases, a heart attack. A stent clears that traffic jam. After the balloon pushes plaque aside, the stent holds that space open so blood flows freely again.
The left anterior descending artery, which supplies a large portion of the heart, is the single most common target for stenting. Narrowing in this artery is found in roughly 40% of patients who undergo the procedure. Stents are also used in the carotid arteries in the neck to prevent stroke, in peripheral arteries in the legs, and occasionally in other organs. A specialized version called a stent-graft, which wraps fabric around a metal frame, can reinforce arteries with weakened walls, such as those at risk of rupturing from an aneurysm.
Types of Stents
The most widely used type today is the drug-eluting stent: a metal mesh coated with medication that slowly releases over weeks to prevent the artery from scarring and narrowing again. Current guidelines recommend drug-eluting stents over bare-metal stents for virtually all patients. Research published in the Journal of the American Heart Association found that newer drug-eluting stents reduced the risk of heart attack and the need for repeat procedures compared to bare-metal versions, with the greatest benefit seen in patients with blockages in major coronary arteries.
Bare-metal stents, made from stainless steel, cobalt-chromium, or nickel-titanium alloy, are still used in some situations but carry a higher chance of the artery re-narrowing. A newer option, the biodegradable stent, dissolves in the artery after a few months once the vessel has healed, though it remains in limited use.
Preparing for the Procedure
Preparation is straightforward. You’ll need to stop eating and drinking for six to eight hours beforehand. Your doctor will review your medications and may ask you to stop or adjust certain ones, particularly blood thinners. You’ll typically arrive at the hospital the morning of the procedure, and a care team will place an IV line, attach heart monitors, and walk you through what to expect.
Recovery Timeline
Recovery depends partly on where the catheter was inserted. If the access point was your wrist, you can return to normal activities, including exercise, after just 24 hours. If the catheter went through your thigh, plan on avoiding strenuous activity for five days, including jogging, golf, tennis, and similar sports. Many people are discharged the same day. If your procedure happens later in the day or there are any complications to monitor, you’ll spend one night in the hospital.
You’ll notice soreness or a small bruise at the insertion site for a few days. This is normal. Most people return to work within a week, though the timeline varies with the physical demands of your job.
Medications After a Stent
One of the most important parts of getting a stent is the medication that follows. You’ll be placed on dual antiplatelet therapy, which means taking two blood-thinning medications together to prevent blood clots from forming on the new stent. Current guidelines recommend this combination for up to 12 months after the procedure, though your doctor may shorten or lengthen that window based on your bleeding risk and overall health.
After the initial period, many patients transition to a single blood-thinning medication long term. Stopping these medications too early is one of the biggest risk factors for a dangerous clot forming inside the stent, so it’s critical to follow your prescribed schedule closely.
Risks and Possible Complications
Stent placement is considered safe, but no procedure is without risk. The most concerning complication is stent thrombosis, where a blood clot forms inside the stent and blocks the artery again. This risk is highest in the first month after a bare-metal stent and the first six months after a drug-eluting stent, which is exactly why the blood-thinning medications matter so much.
Other potential complications include bleeding or bruising at the catheter insertion site, allergic reaction to the contrast dye, and, rarely, damage to the artery during the procedure. The risk of needing a repeat procedure on the same spot is higher with bare-metal stents. Long-term follow-up data shows that about 16% of patients with bare-metal stents needed a repeat procedure on the original stented area within 14 months. Drug-eluting stents have significantly lower rates of re-narrowing.
What It Costs
The total cost of a single-vessel stent procedure varies depending on where it’s performed. At an ambulatory surgical center, the national average is around $7,771. At a hospital outpatient department, that figure rises to roughly $12,257. For patients on Original Medicare, the program covers about 80% of the cost, leaving you responsible for approximately $1,550 to $1,830 out of pocket. Medicare also caps hospital outpatient copayments at $1,676 for this type of procedure. Private insurance coverage varies, but most plans cover medically necessary stent procedures after you meet your deductible.