Stent Placement

What it is

Stenting, also known as coronary angioplasty (percutaneous coronary intervention), is an invasive treatment procedure for coronary arteries narrowed or blocked by atherosclerotic plaque. A thin catheter is inserted into the vascular system through an artery in the wrist or groin and guided to the narrowed segment. A balloon is used to widen the artery, after which a metal mesh scaffold — a stent — is placed to keep the vessel open and restore blood flow.

Why it is performed

The goal of the procedure is to restore blood supply to the heart muscle, relieve chest pain (angina), prevent a heart attack, or limit damage to heart tissue during an acute myocardial infarction that has already occurred. The cardiologist decides whether stenting is appropriate based on clinically significant narrowing identified during angiography.

How it is performed

The procedure is usually carried out under local anesthesia in the angiography suite:

• The wrist (radial access) or groin (femoral access) area is prepared and locally anesthetized.
• A thin introducer sheath is placed in the artery, and a catheter is guided through the vascular system using contrast dye.
• Under X-ray guidance (fluoroscopy), the narrowed segment is precisely located.
• A balloon catheter is advanced over a guidewire to the narrowing and inflated to widen the vessel.
• One or more stents are positioned at the target segment(s) and expanded to press against the artery wall.
• The result is checked again with contrast dye, the catheter is removed, and pressure or a closure device is applied to the access site.

Procedure duration varies with complexity, and a period of several hours of monitoring is typically required afterward.

Who it may be recommended for

The procedure may be recommended for patients with clinically significant coronary narrowing found on angiography, those with angina persisting despite medical therapy, or those experiencing acute coronary syndrome, including myocardial infarction. Suitability is assessed individually by the cardiologist for each patient.

Preparation

Blood tests, an ECG, and additional examinations if needed are performed before the procedure. Fasting for a period specified by the physician may be required. Blood-thinning medications, allergies (particularly to contrast dye), and chronic conditions should be reported to the doctor in advance. Starting antiplatelet medication before the procedure may be recommended.

After the procedure / Recovery

After the procedure, the patient is monitored for a period of time, with the access site and overall condition observed. Strict adherence to the physician-prescribed dual antiplatelet therapy regimen (usually long-term) is essential to keep the stent open — stopping these medications prematurely increases the risk of stent thrombosis. The timing of return to physical activity, work, and follow-up visits is determined individually by the physician.

Risks

Like any invasive procedure, stenting carries certain risks: bleeding or hematoma at the access site, reaction to contrast dye, vessel injury, heart rhythm disturbances, and, rarely, stent thrombosis or renarrowing of the vessel (restenosis). The likelihood of these complications depends on the patient's overall health and the complexity of the procedure and is explained in detail by the physician beforehand.