2 September, 2026

Angioplasty Without Leaving Metal Behind: How Drug-Coated Balloon Treatment Works

For many patients, angioplasty and stent placement seem inseparable. A balloon opens the blocked heart artery, and a metal stent is placed to keep it open.

But does every blockage need a permanent stent?

In carefully selected patients, a drug-coated balloon, or DCB, can treat the narrowed artery without leaving another layer of metal behind. The balloon opens the vessel, delivers medication to the artery wall and is then removed.

This “leave nothing behind” approach can be particularly valuable for small coronary arteries, narrowing inside a previous stent and situations where placing more metal may create future difficulties.

What Is a Drug-Coated Balloon?

A drug-coated balloon is a specialised angioplasty balloon coated with medication that helps reduce excessive tissue growth inside the artery.

During the procedure:

A thin catheter carries the balloon to the narrowed area.
The blockage is carefully prepared using regular or specialised balloons.
The drug-coated balloon is positioned across the treated segment.
It is inflated for a controlled period.
The medication transfers from the balloon to the artery wall.
The balloon is deflated and completely removed.

Unlike a coronary stent, the drug-coated balloon does not leave a permanent metal structure behind.

The medication remains within the vessel wall for a period and helps limit the cellular response that can cause the artery to become narrow again.

Is It Still Angioplasty If No Stent Is Placed?

Yes.

Angioplasty refers to opening a narrowed artery using a catheter-based procedure. A stent is one of the tools that may be used during angioplasty, but it is not the procedure itself.

In conventional angioplasty, a stent is usually implanted after balloon expansion. In DCB angioplasty, the objective is to achieve a safe and satisfactory result with the balloon and medication alone.

However, avoiding a stent should never be the only goal. The main goal is to restore blood flow safely and achieve a durable result.

If the artery develops a major tear, remains severely narrowed or does not maintain adequate blood flow after balloon preparation, a stent may still be necessary.

Why Would a Cardiologist Avoid Leaving Metal Behind?

Coronary stents have saved countless lives and remain essential in many heart procedures. A drug-coated balloon is not intended to replace stents in every situation.

However, leaving no permanent implant can offer important advantages in selected cases.

No Additional Metal Layer

Placing a new stent inside an existing stent creates another layer of metal. Multiple layers can make the artery more rigid and may complicate future treatment.

A drug-coated balloon can deliver medication without necessarily adding another stent layer.

Preserves the Natural Movement of the Artery

Once the procedure is complete, no metal scaffold remains in the treated segment. This may help preserve the artery’s natural movement and make future treatment options more flexible.

Useful in Very Small Arteries

In a small coronary artery, even a thin stent occupies some space. The smaller the vessel, the more important every fraction of the inner channel becomes.

A drug-coated balloon may treat the vessel without leaving metal inside its already limited space.

May Allow a Shorter Course of Dual Antiplatelet Therapy

After stent placement, patients are usually prescribed dual antiplatelet therapy—commonly aspirin plus another antiplatelet medicine—to prevent a clot from forming inside the stent.

Because a DCB does not leave a permanent metal implant, some appropriately selected patients may be suitable for a shorter course of dual antiplatelet treatment.

The duration is not the same for everyone. It depends on whether the procedure was performed for stable coronary disease or a heart attack, the angioplasty result, bleeding risk and whether another stent is already present.

Is an Antiplatelet Medicine the Same as a Blood Thinner?

Patients often use the term “blood thinner” for several different medicines.

After angioplasty, the relevant medicines are commonly antiplatelet drugs, which reduce the ability of platelets to form clots. These are different from anticoagulants prescribed for conditions such as atrial fibrillation, deep-vein thrombosis or mechanical heart valves.

A drug-coated balloon may be considered in patients with a high bleeding risk or those who may have difficulty taking prolonged dual antiplatelet therapy. However, it does not mean that all antiplatelet treatment can be stopped immediately.

Patients must never stop aspirin, clopidogrel or another prescribed medicine without consulting their cardiologist.

When Can a Drug-Coated Balloon Be Used?

1. Narrowing Inside a Previous Stent

One of the most established uses of drug-coated balloon angioplasty is in-stent restenosis—when tissue growth or new disease causes an artery to become narrow again inside a previous stent.

If the existing stent provides adequate structural support, a DCB may treat the narrowing without placing another metal stent inside it.

Before treatment, the cardiologist must identify why the previous stent has narrowed. A drug-coated balloon alone may not solve the problem if the original stent is significantly under-expanded, fractured or surrounded by resistant calcium.

2. Small Coronary Arteries

Small-vessel coronary disease can be difficult to treat because the available space inside the artery is limited.

A drug-coated balloon may be suitable when the lesion can be adequately expanded and blood flow remains stable after preparation.

3. Patients With a High Risk of Bleeding

Some patients have conditions that make prolonged dual antiplatelet therapy more difficult, including:

A previous major bleeding episode
Recurrent gastrointestinal bleeding
Low platelet counts
The need for anticoagulation for another medical condition
Planned non-cardiac surgery
Frailty or other high-risk health conditions

A stent-free approach may sometimes help reduce the required duration of dual antiplatelet therapy. The cardiologist must balance the risks of bleeding, heart attack and recurrent narrowing for each patient.

4. Blockages at Certain Branch Points

When a blockage occurs where one coronary artery divides into two branches, placing a stent across a smaller side branch may be undesirable.

A DCB may sometimes be used in the side branch after the main vessel has been treated. This can avoid complex two-stent techniques in selected bifurcation lesions.

5. Selected New Blockages

A drug-coated balloon may be considered for certain previously untreated—or de novo—coronary blockages when proper lesion preparation produces a good result.

This approach is highly selective. The artery must have acceptable blood flow, limited residual narrowing and no major vessel-wall tear after balloon preparation.

The Most Important Step Happens Before the Drug-Coated Balloon

A DCB should not simply be inflated inside an unprepared blockage.

The artery must first be carefully assessed and prepared. This may involve:

A standard angioplasty balloon
A non-compliant high-pressure balloon
A scoring balloon
A cutting balloon
Calcium-modifying treatment in selected cases

The objective is to create a sufficiently open and stable channel so that the medication can reach the artery wall evenly.

If the artery remains tight after preparation, the drug may not be delivered effectively. If there is a major dissection or inadequate blood flow, a stent may be required as a rescue treatment.

How Do IVUS and OCT Help?

An angiogram provides a two-dimensional outline of blood flow, but it may not reveal the complete structure of the blockage.

Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) examine the artery from inside. They can help determine:

The actual size of the artery
The length and pattern of the blockage
Whether calcium is present
Whether a previous stent is fully expanded
The cause of in-stent restenosis
Whether another stent is necessary
Whether the final result is adequate

In complex or recurrent narrowing, image-guided treatment can be particularly valuable because the success of DCB angioplasty depends heavily on proper lesion preparation.

What Happens During DCB Angioplasty?

The procedure is usually performed through an artery in the wrist or groin.

After local anaesthesia:

A guiding catheter is advanced towards the coronary artery.
A fine guidewire crosses the blockage.
The lesion is opened using an appropriately sized balloon.
Specialised balloons or calcium-modifying devices may be used if required.
The cardiologist checks the remaining narrowing, vessel-wall appearance and blood flow.
If the result is suitable, the drug-coated balloon is inflated across the entire treated segment.
The balloon is removed, and the final result is reassessed.
A stent is placed only if the artery does not remain safely open.

The drug-coated balloon is used for a single treatment and is not left inside the body.

Can the Artery Close Again Without a Stent?

There is a possibility of recurrent narrowing after any coronary intervention, including both DCB treatment and stenting.

A DCB result is more likely to be successful when:

The lesion has been properly prepared
The artery has adequate blood flow
Residual narrowing is acceptable
There is no major dissection
The medication covers the complete treated area
The patient follows the prescribed medical treatment

If these conditions are not met, placing a stent may provide a safer and more predictable result.

When Is a Stent Still the Better Option?

A stent may be necessary when:

The artery has a major tear after balloon expansion
Blood flow becomes impaired
Significant narrowing remains
The artery recoils after balloon treatment
The blockage is highly calcified and cannot be adequately prepared
Structural support is required to keep the vessel open
The anatomy is unsuitable for balloon-only treatment
The patient is undergoing emergency treatment where reliable vessel support is essential

A good interventional strategy is not “DCB versus stent” in every patient. It is about selecting the right device for the specific artery and clinical situation.

Recovery After Drug-Coated Balloon Angioplasty

Recovery is generally similar to standard coronary angioplasty.

Patients may be advised to:

Take all prescribed medicines regularly
Avoid strenuous activity for a short period
Keep the wrist or groin access site clean
Attend follow-up appointments
Control cholesterol, diabetes and blood pressure
Stop smoking and tobacco use
Follow a heart-healthy diet
Participate in cardiac rehabilitation when recommended

The absence of a stent does not mean that coronary artery disease has been cured. Long-term risk-factor control remains essential.

Key Takeaway

A drug-coated balloon offers an important option for treating selected coronary blockages without leaving a permanent metal implant.

It can be particularly useful for narrowing inside a previous stent, small coronary arteries, certain branch-point lesions and some patients with a high bleeding risk.

However, DCB angioplasty is not suitable for every blockage. Its success depends on careful patient selection, meticulous preparation of the artery and a satisfactory result before the drug-coated balloon is used.

The best treatment may be a drug-coated balloon, a stent, a combination of techniques or, in some complex cases, bypass surgery. The decision should be based on the artery’s anatomy—not simply on the desire to avoid a stent.

Frequently Asked Questions

1. Is drug-coated balloon angioplasty completely stent-free?

The intended result is to treat the blockage without leaving a stent. However, a stent may still be required if the artery does not remain adequately open or develops a significant tear.

2. Does the balloon remain inside the artery?

No. The balloon is inflated temporarily to deliver medication and is then completely removed.

3. Where does the medicine go after the balloon is removed?

During inflation, the medication transfers from the balloon surface into the artery wall. It helps limit the tissue response that can cause recurrent narrowing.

4. Is a drug-coated balloon better than a stent?

Neither treatment is universally better. A DCB may be preferable in selected situations, while a stent provides essential structural support in others.

5. Can DCB angioplasty treat a stent that has narrowed again?

Yes, in-stent restenosis is an important use of drug-coated balloon treatment. The previous stent should first be assessed for under-expansion, calcium, fracture or another mechanical problem.

6. Is it suitable for all small coronary arteries?

No. The blockage must be adequately prepared, and the artery must maintain acceptable blood flow without a major dissection.

7. Can I avoid blood-thinning medicines after DCB treatment?

No procedure guarantees that antiplatelet medication can be avoided. Some patients may require a shorter course, but the exact medicines and duration must be decided by the treating cardiologist.

8. Can a drug-coated balloon treat a heart attack?

It may be considered in carefully selected cases, but many heart-attack blockages still require a stent. Emergency treatment prioritises restoring and maintaining blood flow safely.

9. What happens if the DCB procedure does not produce a good result?

The cardiologist may place a drug-eluting stent to keep the artery open. This is sometimes called provisional or bailout stenting.

10. Can a drug-coated balloon be used more than once?

A new balloon is used for each treatment. If narrowing recurs later, the artery must be reassessed before deciding whether repeat DCB treatment, stenting or another approach is appropriate.

About Dr. Dhamodaran K

Dr. Dhamodaran K is a renowned interventional cardiologist with more than 24 years of experience in advanced coronary and structural heart interventions. He completed his DM in Cardiology at Madras Medical College and Research Institute and his postdoctoral FNB fellowship at Escorts Heart Institute, Delhi.

He is a Fellow of the European Society of Cardiology and the Society for Cardiovascular Angiography and Interventions, USA.

His expertise includes image-guided complex and multivessel angioplasty, IVUS, Rotablation, orbital atherectomy, laser angioplasty, cutting-balloon angioplasty, intravascular lithotripsy, Impella-supported high-risk PCI and advanced structural heart interventions. He has performed more than 25,000 cardiac catheterisation procedures.

Consultation Locations

Sidharam Multispeciality Clinic
Old No. 2, New No. 4, Canal Bank Road, Gandhi Nagar, Adyar, Chennai – 600020
Monday–Thursday: 6:00 PM–9:00 PM

Apollo Hospitals, Greams Road, Chennai
Monday–Saturday: 10:00 AM–4:00 PM

This article is for patient education and should not replace an individual consultation with a qualified cardiologist.

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