Angioplasty and Stents (PCI): What Actually Happens
A plain-English walk through the procedure, from the wrist to the drive home.
If someone has told you that you may need a stent, you have probably already been given the medical version: a percutaneous coronary intervention, or PCI. Here is the plain one, including the parts people usually only find out on the day.
Call 911 now if you have chest pressure, tightness or heaviness lasting more than a few minutes, especially with breathlessness, sweating, nausea, or discomfort spreading to the arm, neck or jaw. Do not drive yourself. Treatment works best in the first hours, and an ambulance can start it before you arrive.
What a stent actually is
A stent is a small mesh tube, a few millimetres across, made of metal. It goes inside a coronary artery that has narrowed, and it holds the artery open.
Most stents used now are drug-eluting, which means they are coated with a medicine released slowly over the following weeks. The coating exists to stop scar tissue growing back into the newly opened artery, which was a common problem with older bare metal stents.
It stays in permanently. The artery wall grows a thin lining over it within a few months, so it becomes part of the vessel rather than something sitting loose inside it. It does not set off airport scanners, it does not need replacing, and you cannot feel it.
Why the artery narrowed in the first place
Over years, cholesterol builds up in the wall of the artery and forms plaque. The channel the blood flows through gets narrower and stiffer. When it narrows enough, the heart muscle downstream stops getting all the blood it needs when you ask more of it, which is what angina is: chest tightness on exertion that eases when you stop.
A heart attack is usually a different event. Rather than an artery slowly closing to nothing, a plaque cracks, the body forms a clot to seal the crack, and that clot blocks the artery within minutes. That is why someone can feel well one day and not the next, and it is why a heart attack is an emergency in a way that stable angina is not.
We have written about the process in more detail on how high cholesterol affects your heart and arteries.
When a stent helps, and when it doesn't
This is where it is worth being straight with you, because the honest answer is more nuanced than most pages make it.
In a heart attack, opening the blocked artery quickly saves heart muscle and saves lives. There is no real argument about it. Speed is everything.
In stable angina, the picture is different. A stent is very good at relieving symptoms when medication has not controlled them, and that matters enormously if breathlessness or chest tightness is limiting your life. But for many people with stable disease, the evidence that a stent prevents a future heart attack or extends life is much weaker than people assume. Good medical treatment does a great deal of the work.
So the question is not simply "is there a narrowing". It is what the narrowing is doing to you, what your symptoms are, what your other arteries look like, and what you want. Current national guidance is explicit that these decisions should be patient-centered and made together, and that where the best route is unclear a multidisciplinary heart team should weigh in. If anyone tells you a stent is automatic because a scan showed a narrowing, ask more questions.
What the day looks like
Before
You will be told when to stop eating, usually from midnight. Most medicines carry on as normal, but some are paused, so bring your full list, including anything you buy yourself. Blood tests and an ECG are done beforehand. You will need someone to drive you home..
Getting in
Almost always through the wrist. The radial artery at the wrist is now the preferred route for PCI in national guidance, because it causes less bleeding and fewer complications at the access site than going in through the groin, and in heart attack patients it is associated with better survival. The groin is still used where the wrist is not suitable.
The area is numbed. You will feel pressure, and pushing, but the numbing handles the rest. You stay awake, though you are given something to help you relax. People are often surprised by how little of it they feel, given what is happening.
The procedure
A thin flexible tube is guided from the wrist up to the heart. Contrast dye is injected so the arteries show up on X-ray, and that picture, the angiogram, is what shows exactly where the narrowing is and how tight it is.
If a narrowing needs treating, a fine wire is passed across it, a small balloon is inflated to open it, and the stent is expanded into place. Inflating the balloon can cause a few seconds of chest discomfort, because blood flow briefly pauses. Say so if it happens. It settles quickly.
The whole thing usually takes somewhere between thirty minutes and an hour and a half, depending on how many arteries are involved.
Afterwards
A band is put on the wrist to compress the puncture site, and it is loosened gradually over a few hours. You lie flat for a while if the groin was used, less so with the wrist.
Many people go home the same day or the following morning after a planned procedure. After a heart attack, the stay is longer, because the recovery being watched is the heart muscle's, not the artery's.
Recovery, realistically
The first week: keep the wrist or groin site clean and dry, and avoid lifting anything heavy. A bruise is normal. A swelling that is growing, or bleeding that does not stop with pressure, is not, and needs a call.
Driving: usually within a few days after a planned procedure, longer after a heart attack. Ask us for your specific answer rather than assuming.
Work: desk work often within a week. Physical work takes longer.
Exercise: walking starts almost immediately and is encouraged. Build up from there, and we will tell you what the ceiling is for the first few weeks.
Cardiac rehabilitation: if it is offered to you, take it. It is one of the few things after a heart event with clear evidence behind it, and people who complete it do better.
The medication afterwards matters as much as the stent
After a stent you will be on two blood-thinning medicines that stop platelets clumping, usually for somewhere between six and twelve months, and often one of them for the long term afterwards. The exact plan depends on why the stent went in and on your bleeding risk.
Do not stop either of them without speaking to your cardiologist first. This is the single most important thing on this page after the emergency box. Stopping early can allow a clot to form inside the stent, which causes a heart attack. If a dentist or another surgeon asks you to stop them before a procedure, tell them you have a stent and ask them to call us rather than deciding on their own.
You will also usually be on a cholesterol-lowering medicine, and often blood pressure treatment. Those are not optional extras. A stent fixes one narrowing. It does nothing about the process that created it, which is still going on in every other artery you have.
The risks, plainly
PCI is a common procedure
Serious complications are uncommon, but they exist and you should hear them before the day rather than on the consent form.
Bleeding or bruising at the wrist or groin
The most common issue, and less likely via the wrist.
Reaction to the contrast dye, and a temporary effect on kidney function
Particularly if your kidneys are already not working well.
Damage to the artery during the procedure
Which occasionally needs further treatment.
Heart attack, stroke or the need for emergency bypass surgery
These are rare.
Clotting inside the stent
Which is why the medication is taken so seriously.
Your own risk depends on your kidneys, your other conditions, how many arteries are involved and whether the procedure is planned or an emergency. Ask for your numbers, not the average ones.
FAQs
Common Questions
Will I feel the stent?
No. Once it is in, there is nothing to feel. If chest symptoms come back, that is worth reporting, but it is not the stent making itself known.
Can a stented artery narrow again?
It can, though it is much less common with modern drug-eluting stents than it was. If your old symptoms come back, tell us rather than waiting for the next appointment.
Is a stent better than bypass surgery?
Neither is better in general. It depends on which arteries are involved, how many, whether you have diabetes, and how your heart is pumping. For some patterns of disease, surgery gives better long-term results. Where the answer is not clear-cut, guidance says a heart team should decide it together with you.
Can I have an MRI afterwards?
Yes. Modern coronary stents are safe in an MRI scanner. Tell the radiology team you have one anyway.
Does having a stent mean my heart is damaged?
Not necessarily. If the stent went in for stable angina, the heart muscle may be entirely undamaged. After a heart attack, some muscle may have been affected, and how much depends largely on how quickly the artery was opened.
What if I decide I don't want one?
For stable symptoms, that is a legitimate choice and we will talk you through what the alternative looks like. In a heart attack it is different, because time is muscle. But it is still your decision, and you are entitled to understand it properly before making it.
The short version
A stent is a small mesh tube that props open a narrowed coronary artery, put in through the wrist under local anesthetic, usually in under ninety minutes. In a heart attack it saves heart muscle and lives, and speed matters more than anything. In stable angina it is very good at relieving symptoms and less clearly a way of preventing future events, so it is a decision to make together rather than a foregone conclusion. Afterwards, the blood-thinning medication is as important as the stent itself, and the underlying disease still needs treating everywhere else.
Book Your Next Appointment
Having this done in Fort Myers
Dr. Mazen Albaghdadi, MD is an interventional and structural cardiologist, which means the same physician who assesses you performs the procedure. You are not handed to a stranger on the day. Procedures are carried out in the hospital catheterization laboratory, with follow-up back at our office.
We see patients at 13411 Parker Commons Blvd, Fort Myers, on the north side of Daniels Parkway, and care for people across Lee and Charlotte counties, including Cape Coral, North Fort Myers, Lehigh Acres, Punta Gorda, Estero, Bonita Springs and Naples.
If you have been told you need a stent and want a second opinion, that is a reasonable thing to ask for. Bring your angiogram images if you have them.
Call (239) 415-4900 or use the contact page to book. We can usually see new patients within 1 to 2 days, pending insurance approval. Referring physicians will find what we need on the referral page.
This page is for general education. It is not a substitute for advice from your own doctor about your own case. If you have symptoms, contact your doctor or get emergency care.
Sources: 2021 ACC/AHA/SCAI guideline for coronary artery revascularization; American Heart Association patient information on angioplasty and stents.
