How Stents Restore and Maintain Coronary Artery Health

When an angiogram detects narrowed or blocked coronary arteries, stents are vital in restoring proper blood flow to the heart. Here's an overview of their function:

Stent Placement:

• A stent is a small mesh tube, typically made of metal like stainless steel or cobalt-chromium alloy.
• After the artery is widened during angioplasty, the stent is inserted to keep the artery open.
• The stent acts as a scaffold, maintaining the artery’s openness and preventing it from narrowing again.

Tissue Integration:

• Over time, heart tissue grows around the stent.
• Most stents are coated with medication to prevent excessive tissue growth, ensuring the artery remains open long-term.

Benefits:

• Stents enhance blood flow, alleviate symptoms such as chest pain, and lower the risk of heart attacks.
• They provide structural support, keeping the artery's diameter stable and preventing future blockages.

In short, stents are crucial for keeping coronary arteries open, ensuring free blood flow, and supporting overall heart health.
How Stents Restore and Maintain Coronary Artery Health

What is stent?

A stent is a tiny tube placed into a hollow structure in patient’s body that can play a big role in treating heart disease. It helps keep the arteries -- the blood vessels that carry blood from heart to other parts of the body, including the heart muscle itself -- open. Stents are usually needed when plaque blocks a blood vessel. Plaque is made of cholesterol and other substances that attach to the walls of a vessel.

When a stent is placed into the body, the procedure is called stenting. There are 3 main types of stents:
* Bare metal stents are simple tubes made of metal mesh that can be used in both the coronary and carotid arteries.
*Drug-eluting stent – which is coated with medication that reduces the risk of the artery becoming blocked again.
*Biodegradable stents dissolve after a few months. This type of stent can be useful when the need is temporary.

When patient have a stent placed, it's meant to be permanent. Stents can stay in human body without breaking down over time. However, stents only treat one area where the artery has narrowed or closed.
What is stent?

Angioplasty And Vascular Stents

During the angiogram procedure and x-ray dye is injected through the catheter in order to allow coronary arteries to show on x-ray. The angiogram would show where the blockages are. Angioplasty or stenting may be done right away. if needed.

Angioplasty is used to restore normal blood flow when a vein or artery is too narrow or blocked. It is normally done in an interventional radiology suite rather than operating room.

Angioplasty with or without vascular stenting, uses a balloon-tipped catheter to open a blocked blood vessel and improve blood flow.

The doctor uses medical imaging (e.g. x-ray fluoroscopy) to guide the catheter to the blockage. The balloon is inflated to open the vessel and compress the plaque against the walls of the vessel, widening the channel. This will improve blood flow. It may be done with or without a metal mesh tube called a stent. The stent is left inside after the procedure is completed and remains there forever to help keep the blood vessel it open.

An angiogram is then done to confirm that the artery has been opened, improving blood flow. The procedure of angioplasty is minimally invasive and usually does not require general anesthesia.

Possible risk of angioplasty and vascular stenting:
■ Bleeding or clotting
■ Tearing of the artery lining
■ Arrhythmia
■ Allergic reaction to the x-ray dye
■ Kidney failure
Angioplasty And Vascular Stents