A heart stent is placed through a thin, flexible tube threaded into your artery, typically from your wrist or upper thigh. The entire procedure usually takes about an hour, you’re awake for it, and most people go home the next day. Here’s what actually happens at each stage.
How You’re Prepped Before the Procedure
You’ll be asked to fast for several hours beforehand. An IV line goes into your arm to deliver fluids, blood thinners, and a mild sedative. Most people receive light sedation, enough to make you relaxed and drowsy but not fully asleep. The combination typically used is a short-acting anti-anxiety medication paired with a pain reliever, both of which can be reversed quickly if needed. General anesthesia is rare for stent placement but occasionally used if someone has a specific medical reason for it.
The entry point on your skin, either at the wrist or the top of the thigh near the groin, gets cleaned and numbed with a local anesthetic. You’ll feel pressure when the cardiologist starts working, but not sharp pain.
Wrist Entry vs. Groin Entry
The two access points are the radial artery in the wrist and the femoral artery in the upper thigh. Wrist access has become more common because it’s easier on the patient afterward: you can sit up sooner, and the risk of bleeding at the puncture site is lower. Groin access is still used in certain situations, such as when the cardiologist needs a larger catheter or when the wrist arteries are too small or have already been used in a prior procedure.
In terms of outcomes like survival, stroke, or heart attack recurrence, large clinical trials have found no significant difference between the two approaches. The choice comes down to your anatomy and your cardiologist’s judgment.
What Happens Inside Your Artery
Once the entry point is numbed, the cardiologist inserts a short hollow tube called a sheath into the artery. This acts as a stable gateway. A longer, thinner catheter is then guided through the sheath and up through your blood vessels until it reaches the coronary arteries of your heart.
At this point, contrast dye is injected through the catheter. The dye shows up on a live X-ray feed (called fluoroscopy), giving the cardiologist a real-time map of your arteries. You might feel a brief warm flush when the dye is injected. This imaging reveals exactly where the blockage is and how severe it looks.
A thin guidewire is then advanced through the catheter and past the narrowed section of artery. This wire serves as a rail for everything that follows.
Opening the Blockage
A small balloon, mounted on the tip of a catheter, is slid along the guidewire until it sits right inside the narrowed segment. The cardiologist inflates the balloon, which compresses the fatty plaque against the artery wall and widens the opening. You may feel brief chest pressure or mild angina during inflation, which is normal and temporary.
The stent itself is a tiny mesh tube made of metal alloy, collapsed tightly around the balloon before insertion. When the balloon inflates, the stent expands with it and locks into place against the artery wall. Once expanded, the stent holds its shape permanently. The balloon is then deflated and pulled out, leaving the stent behind as a scaffold to keep the artery open.
The cardiologist takes another round of X-ray images with contrast dye to confirm that blood is flowing freely through the newly opened section. If the result looks good, the catheter and sheath are removed, and pressure is applied to the entry site to stop bleeding.
Types of Stents
Nearly all stents placed today are drug-eluting stents. These are coated with medication that slowly releases over weeks to months, preventing the artery from scarring and re-narrowing at the stent site. This re-narrowing, called restenosis, was the main limitation of older bare-metal stents. Drug-eluting stents have largely replaced bare-metal versions across most hospitals because they significantly reduce the need for repeat procedures.
Newer generations of drug-eluting stents use a coating that gradually dissolves after delivering its medication, which promotes better healing of the artery lining. One study found these newer designs reduced the risk of blood clots forming on the stent by 54% compared to older models.
How Long Recovery Takes
Most people stay in the hospital overnight for monitoring, though some go home the same day. The puncture site needs a few days to heal. If your catheter went through the groin, you’ll be told not to lift anything over 10 pounds for five to seven days. Wrist access generally has fewer restrictions on movement.
Most people return to normal daily activities and work within a few days to a week. You’ll likely be told to avoid strenuous exercise for a short period, and driving restrictions depend on which access site was used and how you’re feeling. If you notice bleeding at the puncture site that doesn’t stop with firm pressure after 20 minutes, that’s a reason to call 911 rather than drive yourself in.
Medications After the Procedure
The most important part of recovery is the medication regimen. After a stent is placed, you’ll take two blood-thinning drugs together to prevent clots from forming on the new stent. This combination is low-dose aspirin plus a second anti-clotting drug.
How long you stay on the second drug depends on why you needed the stent. If the stent was placed for a heart attack, the standard recommendation is at least 12 months on both medications. If it was placed for a stable blockage using a drug-eluting stent, the minimum is typically 6 months. After that period, most people continue taking low-dose aspirin indefinitely.
Stopping these medications too early is the single biggest risk factor for stent thrombosis, which is when a blood clot forms inside the stent. This complication is uncommon with modern stents, occurring in roughly 0.5% of cases, but it’s serious when it does happen. Early stent thrombosis, within the first month, carries mortality rates as high as 50%. This is why cardiologists emphasize that you should never stop your anti-clotting medications without a specific conversation with your care team, even if you feel perfectly fine.
What Success Looks Like
Stent procedures have a high success rate for restoring blood flow immediately. Most people notice relief from chest pain or shortness of breath right away. The long-term outlook depends on managing the underlying coronary artery disease through medication, diet, exercise, and sometimes cardiac rehabilitation. The stent fixes one narrowed segment, but it doesn’t stop plaque from building up elsewhere in your arteries, which is why lifestyle changes remain essential after the procedure.