A heart stent is a small metal coil that supports the narrowed segment of the coronary artery after coronary angioplasty.
Coronary artery narrowings may be treated using either medication that reduces the heart's demand for blood or by procedures aimed at increasing the heart's blood supply. One of the two most common methods to increase the blood supply is Coronary Angioplasty, sometimes abbreviated as PTCA (Percutaneous Transluminal Coronary Angioplasty).
PTCA offers a non-surgical alternative to Coronary Artery Bypass Surgery.
In PTCA, a balloon mounted on a thin tube (a catheter) is advanced into your coronary artery until it lies within the narrow area. The balloon is then inflated at high pressure, often a few times, to dilate the narrowing. Upon balloon deflation, arterial narrowing is often significantly reduced.
A heart stent is a small metal coil to support the narrowed segment of the coronary artery after angioplasty, preventing the artery from collapsing and reducing the likelihood the narrowing will recur. Modern heart stents are made of stainless steel or a cobalt-chromium alloy and are inert to the body. Some heart stents also have a medication coating, and these may be preferred in certain situations to further reduce the chance of repeat narrowing of the heart arteries. Nowadays, heart stents are frequently placed directly over the narrowed segments (direct stenting) without prior balloon dilatation.
A heart stent is a small metal coil that provides support to the narrowed segment of the coronary artery after angioplasty.
Before going through a PTCA, a coronary angiogram is done first to provide a 'roadmap'. Undergoing PTCA is also very similar to having a Coronary Angiogram procedure.
During balloon inflation, you may experience some chest discomfort, and you should report this to your attending cardiologist. Stenting is carried out in a similar manner. The procedure may take from 1 to 2 hours or more, depending on the complexity of the diseased artery.
Following the successful PTCA, you will be monitored in a special monitoring ward. During this period, the sheath may be kept in your groin artery for 4 to 5 hours. However, the sheath may be removed immediately after the procedure if the situation allows. After the sheath is removed, the puncture site will be compressed for about 30 minutes to ensure that there is no bleeding.
You will have to remain in bed for several hours or until the following day to ensure the puncture site is sufficiently healed before walking. Your cardiologist will determine how long you need to stay in bed before you can walk around. Following that, some blood tests and ECGs will be performed to monitor your condition. If there are no complications, most patients can be discharged on the same day or the day after.
The success rate of Coronary Angioplasty is usually about 95%, depending on the nature of your coronary narrowing. However, in about 5% of cases, the procedure may be unsuccessful, and the artery remains narrowed. In very few patients (about 1%), urgent bypass surgery may be required if the procedure is complicated.
There is a possibility of a recurrence of the narrowing of the coronary artery in the six months following the initial successful angioplasty or stenting, and you would usually feel chest discomfort should it happen. If you feel chest pain, you should seek medical attention immediately and inform your doctor.
Coronary arteriogram showing complete occlusion of the right coronary artery
After insertion of a wire, a balloon is inflated at the site of the blockage
Following successful stenting, normal blood flow is restored
Major complications like heart attacks, abnormal heart rhythm, stroke and death occur in less than 1% of the patients undergoing PTCA.
Less serious complications like bleeding from the puncture site, bruising and swelling of the puncture site, and blood clot formation in the artery where the sheath is inserted occurs in 1-3% of the patients.
Overall, the procedure is very safe and well-tolerated.
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This article was last reviewed on
22 Nov 2023
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