Coronary Stents: Types, Benefits, PCI and Treatment Advances

Coronary artery disease is one of the common heart problems worldwide. It is when the arteries that carry blood start to narrow or get blocked due to fatty deposits. It may lead to chest pain, shortness of breath, or even a heart attack.

Doctors often use coronary stents, small mesh-like tubes, to keep these arteries open. Stents are a key part of Percutaneous Coronary Intervention (PCI), helping restore normal blood flow and heart function.

A coronary stent is a tiny tube, usually made of metal or special materials, placed in a narrowed artery. It works like a support frame, keeping the artery open and allowing blood to flow freely.^[1]

Tissue eventually grows around the stent, helping the artery remain open in the long term. In simple terms, a stent is like a support ring inside a clogged water pipe, keeping it wide and functional.

Percutaneous coronary intervention (PCI) is a less invasive procedure to treat narrowed arteries. During PCI:

• A narrow tube (catheter) is inserted into the blocked artery.

• A small balloon is inflated, which helps to widen the artery.

• A stent is placed to keep it open.

Benefits of PCI with stents include:

• Smaller cuts

• Shorter hospital stays

• Faster recovery

• Relief from chest pain and reduced heart attack risk

Doctors use different coronary stents based on the patient's condition:

Bare-Metal Stents (BMS)

• Early-generation stents were made only of metal.

• Provide support, but have a higher chance of re-narrowing.

Drug-Eluting Stents (DES)

• Coated with medicine that releases into the artery.

• Helps prevent restenosis and is widely used today.^[2]

Bioresorbable Stents (BRS - Dissolving Stents)

• Temporary stents that dissolve naturally over time.

• Allow the artery to regain its natural flexibility.

Drug-eluting stents slowly release medicine to prevent scar tissue from forming inside the artery. It lowers the possibility of the artery narrowing again, a condition called restenosis.

Advantages include:

• Long-term support for the artery.

• Improved healing.

• Lower risk of repeat procedures than with bare-metal stents.

A bioresorbable vascular scaffold is a dissolving stent.

• It temporarily supports the artery, then dissolves naturally over approximately 2–3 years.

• Leaves the artery open and functioning normally.

• BVS disappears once healing is complete, restoring natural flexibility.^[3]

DESs act as permanent bridges, while bioresorbable stents serve as temporary scaffolds that dissolve once the artery heals.

Choosing a stent depends on multiple factors:

• Age and overall health of the patient.

• Size and location of the blockage.

• Risk of restenosis.

• Long-term treatment goals.

Doctors also consider a patient's ability to follow post-stent medication, which is vital for preventing blood clots.

As the world evolves, the future of stent technology is advancing rapidly:

• Thinner stents with better flexibility.

• Improved bioresorbable vascular scaffolds.

• Robotic-assisted PCI for precise placement.

• Advanced imaging to guide stents accurately.

These developments aim to make procedures safer, faster, and more effective.

These stents treat blockages but do not completely cure heart disease. As a patient, you should:

• Take prescribed medicines regularly

• Follow a heart-healthy diet.

• Attend regular follow-ups

• Exercise as recommended.

• Avoid smoking and excess alcohol

A stent helps blood flow, but lifestyle choices are crucial for long-term heart health.

Coronary stents have transformed treatment for coronary artery disease. From bare-metal stents to drug-eluting stents, and now bioresorbable stents (dissolving stents), treatment has evolved significantly.

Through Percutaneous Coronary Intervention (PCI), millions of patients have better heart health and improved quality of life. As technology advances, stents and PCI procedures will continue to offer safer and more effective treatment options.