What Is Angioplasty — And How Does It Work?

Angioplasty is a way of opening a blocked or narrowed artery without cutting the chest open. That is the core of it. A thin flexible tube goes in through a blood vessel in the wrist or groin, travels to the blockage, and a small balloon inflates to push the narrowing open. In most cases, a mesh tube called a stent is then placed to keep it open permanently.

The whole procedure usually takes one to two hours. Most patients go home within two to three days. There is no sternum cut, no heart-lung machine, no six-week recovery. For the right kind of blockage, it works extremely well.

Why Arteries Narrow in the First Place

Coronary arteries — the vessels that supply the heart muscle itself with blood — develop narrowings over time through a process called atherosclerosis. Cholesterol-containing plaques build up in the artery wall, the vessel wall becomes inflamed, the lumen narrows. Blood flow drops. The heart muscle gets less oxygen.

When that narrowing reaches a critical degree, symptoms appear. Chest pain on exertion (stable angina) that goes away with rest. Shortness of breath climbing stairs. In worse cases, pain at rest — unstable angina — which is a warning that a more serious event may be coming. A full blockage causes a heart attack.

Angioplasty is used to treat all of these situations, though the urgency differs significantly.

How the Procedure Actually Works

The patient lies on a table in a cardiac catheterisation laboratory. A local anaesthetic is applied — the wrist (radial approach) or groin (femoral approach). A small sheath is inserted into the artery. The cardiologist threads a guide wire through the sheath, navigates it to the coronary artery under X-ray guidance, and crosses the blockage with the wire. This takes skill — the coronary anatomy varies, blockages can be in awkward locations, some are very tight.

Once the wire is across, a balloon catheter is advanced over it to the blockage site. The balloon is inflated with a dilute contrast solution — you can watch it open the narrowing on the fluoroscopy screen. If it is a simple smooth narrowing, this alone might be enough. But most cardiologists then deploy a stent — a small metal mesh cylinder that is crimped onto the balloon, expanded as the balloon inflates, and left permanently in the artery wall when the balloon is removed.

The stent holds the artery open. The artery wall eventually grows over it. Blood flows freely again.

Drug-Eluting Stents vs Bare Metal Stents

Earlier stents — bare metal — had a significant problem: the body's healing response sometimes grew scar tissue inside the stent, re-narrowing it within months. This happened in 20 to 30 percent of cases.

Drug-eluting stents coat the metal with medication that suppresses this healing response. Current-generation drug-eluting stents have re-narrowing rates below five percent at one year. They are now the standard at India's accredited cardiac hospitals — the same brands (Xience, Resolute Onyx, Synergy, Ultimaster) used in UK and US catheterisation labs.

The trade-off: drug-eluting stents require dual antiplatelet therapy — aspirin plus another agent like clopidogrel, ticagrelor, or prasugrel — for six to twelve months to prevent clot formation in the stent before it is fully endothelialised. Stopping this medication early after a drug-eluting stent is dangerous. Patients who know they need surgery within six months of a stent placement need to discuss timing carefully with their cardiologist.

When Is Angioplasty the Right Choice Over Bypass Surgery?

This is the decision that matters most, and it is not as simple as "angioplasty is less invasive so it is better."

Angioplasty works best for:

• Single or double vessel disease with discrete, accessible blockages
• Patients who have already had bypass surgery and have a graft that has blocked
• Patients who are too high-risk for open surgery
• Urgent treatment of a heart attack

Bypass surgery tends to produce better long-term outcomes for:

• Three-vessel disease — particularly when all three major coronary arteries are significantly diseased
• Left main coronary artery disease — the main trunk that feeds the left side of the heart
• Diabetic patients with multi-vessel disease, where long-term bypass graft patency consistently outperforms stenting
• Complex blockages with heavy calcification that stents cannot easily manage

Dr. Balbir Singh at Max Super Speciality Hospital, Saket, New Delhi — the cardiologist in Prime Medical's network — reviews angiograms for patients from East and West Africa seeking this specific decision: angioplasty or bypass? The anatomy drives the recommendation, not patient preference for the less invasive option.

What Happens After Angioplasty

Two to three days in hospital for observation and monitoring. An electrocardiogram and blood tests check that the heart is stable and the procedure was successful. Most patients are walking the day after the procedure.

Before discharge: a prescription for dual antiplatelet therapy, statin medication, beta-blocker if appropriate, and blood pressure medications if needed. Instructions on what symptoms should prompt an immediate return to hospital — chest pain, breathlessness, or palpitations.

After returning home: most patients can return to normal activity within one to two weeks. Driving restrictions vary by country and the reason for the procedure. Heavy lifting and strenuous exercise are restricted initially.

Hospitals in Prime Medical's Network for Angioplasty

1. Artemis Hospital, Gurugram (JCI, NABH) — Strong interventional cardiology. 24-hour catheterisation lab capability.

2. Fortis Memorial Research Institute, Gurugram (JCI, NABH, NABL) — Advanced PCI including complex cases, rotational atherectomy for calcified lesions, and chronic total occlusion angioplasty.

3. Max Super Speciality Hospital, Saket, Delhi (JCI, NABH, NABL) — Full interventional cardiology programme. Dr. Balbir Singh leads cardiology.

4. Indraprastha Apollo Hospital, New Delhi (JCI, NABH) — High-volume interventional cardiology. 24-hour emergency capability.

For patients from Ethiopia, Tanzania, Uganda, and Gambia who have been told they need angioplasty after an angiogram: share the angiogram report with Prime Medical Solutions. A cardiologist reviews it within 48 hours and confirms whether angioplasty is the right approach for the specific anatomy — or whether bypass surgery would serve better.

To book a consultation, call the number on our website.