What Is a Stent?

If you have been told you may need a stent, or you have recently had one fitted, it is completely normal to want a clear explanation of what it is and why it is used. We regularly supports patients with coronary artery disease and chest pain, I often explain that a stent is a small but important device designed to restore blood flow to the heart. Understanding what a stent does, how it is inserted, and what happens afterwards can help you feel more informed and confident about your treatment. Or if you are just curious!

What Actually is a Stent?

A stent is a small metal mesh tube that is placed inside a narrowed or blocked artery to keep it open. In cardiology, stents are most commonly used in the coronary arteries, which supply blood to the heart muscle. When these arteries become narrowed due to fatty build up, blood flow is reduced. This can cause chest pain, known as angina, or lead to a heart attack if the artery becomes completely blocked. The stent acts like a scaffold. Once inserted, it supports the artery walls and helps maintain steady blood flow.

Why Might You Need a Stent?

A stent is usually recommended when there is significant narrowing in one or more coronary arteries. This narrowing is often caused by a build up of cholesterol rich plaque. When the artery becomes too narrow, the heart muscle may not receive enough oxygen, especially during exertion. You may be advised to have a stent if:

• You have ongoing angina despite medication

• Tests show a severe narrowing in a coronary artery

• You are being treated urgently for a heart attack

In heart attack cases, inserting a stent quickly can restore blood flow and limit damage to the heart muscle.

How Is a Stent Inserted?

A stent is placed during a procedure called coronary angioplasty. This is usually performed under local anaesthetic. A thin tube called a catheter is inserted into an artery in the wrist or groin and guided towards the heart. Once positioned at the narrowed area, a small balloon is inflated to widen the artery. The stent, mounted on the balloon, expands and stays in place once the balloon is deflated and removed. The procedure is minimally invasive and does not involve open heart surgery. Most patients are awake throughout and may go home within a day or two, depending on the situation.

What Types of Stents Are There?

There are two main types of stent used in heart treatment. See below:

• Bare metal stents, which provide structural support to keep the artery open

• Drug eluting stents, which slowly release medication to reduce the risk of the artery narrowing again

Do note, drug eluting stents are more commonly used today because they lower the chance of re narrowing over time.

What Happens After a Stent Is Placed?

After a stent is inserted, blood flow to the heart muscle usually improves immediately. Many patients notice that chest pain reduces or disappears. However, the procedure does not cure coronary artery disease. It treats a specific narrowing, but underlying plaque build up can still develop elsewhere.

Patients are typically prescribed blood thinning medication to reduce the risk of clots forming around the stent. Taking this medication exactly as advised is essential. Lifestyle changes also play a key role in preventing further artery narrowing.

Can a Stent Prevent a Heart Attack?

In emergency situations, such as during a heart attack, placing a stent can prevent further damage and save heart muscle. In non emergency cases, stents are used to relieve symptoms such as angina and improve quality of life. While a stent can reduce the risk associated with a specific blockage, long term prevention of heart attack depends on managing risk factors such as cholesterol, blood pressure, diabetes, and smoking.

What Are the Risks of Having a Stent?

As with any medical procedure, there are potential risks, but serious complications are uncommon. Possible risks include bleeding at the catheter site, reaction to contrast dye, or clot formation within the stent. Careful assessment before the procedure and appropriate medication afterwards significantly reduce these risks. Most people recover well and return to normal activities within a short period, although heavy lifting or strenuous exercise may be limited temporarily.

How Long Does a Stent Last?

A stent is designed to remain in place permanently. Once inserted, it becomes embedded within the artery wall as healing occurs. The artery may still develop new narrowing in other areas if underlying risk factors are not controlled, which is why long term heart health management is essential.

Do You Still Need Lifestyle Changes After a Stent?

Yes. A stent treats a specific blockage but does not remove the underlying cause of coronary artery disease. Long term success depends on managing cardiovascular risk factors.

• Maintaining healthy cholesterol levels through diet and medication if needed

• Controlling blood pressure and diabetes

• Stopping smoking and staying physically active

These steps reduce the likelihood of further artery narrowing and support overall heart health.

Will You Feel the Stent?

You will not feel the stent inside your artery. Once the procedure is complete and healing has begun, there is no physical sensation associated with the device itself. Most people are unaware of it in daily life.

When Should You Seek Medical Advice After a Stent?

If you experience new or returning chest pain, shortness of breath, or symptoms similar to those before the procedure, you should seek medical advice. Sudden severe chest pain requires urgent attention. Regular follow up appointments help ensure the stent remains effective and that overall heart health is managed appropriately.

To Summarise

A stent is a small device that plays a vital role in restoring blood flow to the heart when arteries become narrowed or blocked. It can relieve symptoms, improve quality of life, and in emergency situations, limit heart damage. However, long term heart health depends on ongoing risk management and follow up care. If you have been advised to have a stent, recently had one placed, or want to understand your heart treatment options more clearly, you can always contact us here you can also use the chat box on our website for any questions you may have around cardiology.