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Coronary Angiography / Angiogram

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Home > Heart Surgery > Diagnostic Procedures > Coronary Angiography

Coronary Angiography/Angiogram


Coronary angiography is a specialised x-ray test to find out detailed information about your coronary (heart) arteries. It is mainly used if you have angina to assess the extent and severity of the disease. It involves a procedure called cardiac catheterisation.


Understanding the arteries of the heart

The heart is mainly made of special muscle. The muscle pumps blood into arteries (blood vessels) which take the blood to every part of the body.

Like any other muscle, the heart muscle needs a good blood supply. The coronary arteries take blood to the heart muscle. The coronary arteries are the first arteries to branch off the aorta. The aorta is the large artery that takes blood from the left ventricle of the heart to the body.


What is angina and what causes it ?

Angina is a pain that comes from the heart. The usual cause of angina is narrowing of one or more of your coronary arteries. This reduces the blood supply to a part or parts of your heart muscle. The blood supply may be enough when you are resting. However, your heart muscle needs more blood and oxygen when it works harder. For example, when you walk fast or climb stairs, your heart rate increases to deliver the extra blood. If the extra blood that your heart needs during exertion cannot get past the narrowed arteries, the heart 'complains' with pain.

Coronary Angiography, Coronary Angiogram India

The narrowing of the arteries is caused by atheroma. Atheroma is like fatty patches or 'plaques' that develop within the inside lining of arteries. (This is similar to water pipes that get 'furred up' with scale.) Plaques of atheroma may gradually form over a number of years in one or more places in the coronary arteries. In time, these can become bigger and cause enough narrowing of one or more of the arteries to cause symptoms. (The diagram shows three narrowed sections as an example. However, atheroma can develop in any section of the coronary arteries.)


What is coronary angiography ?

Coronary angiography is a special x-ray of the coronary arteries. The coronary arteries do not show up on a plain x-ray. With coronary angiography, dye is injected down the coronary arteries. The arteries and their smaller branches then show up clearly on an x-ray "like a road map". Dye is injected into the coronary arteries by using a catheter. (A catheter is a thin, flexible, hollow tube.) How this is done is descibed below.

Therefore, coronary angiography can show the exact site and severity of any narrowing of the coronary arteries. This helps the doctor to decide on what treatment you may need. For example, if the narrowing is mild and does not need surgery. Or, if the narrowing is severe and you should have a coronary artery bypass graft or coronary angioplasty.

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How is coronary angiography done ?

You lie on a couch in a catheterisation room. An x-ray machine is mounted above the couch. A catheter is inserted through a wide needle or small cut in the skin into a blood vessel in the groin or arm. Local anaesthetic is injected into the skin above the blood vessel. Therefore, it should not hurt when the catheter is passed into the blood vessel. The doctor gently pushes the catheter up the blood vessel towards the heart. Low dose x-rays are used to monitor the progress of the catheter tip which is gently manipulated into the correct position. You may be able to see the progress of the catheter on the x-ray monitor.

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Coronary Angiography, Coronary Angiogram India, Affordable Coronary Angiography, Cost Coronary Angiography India

The tip of the catheter is pushed just inside a main coronary artery. Some dye is then injected down the catheter into the artery. Several x-ray films are rapidly taken as the dye is injected (the dye shows up clearly on x-ray films). The x-ray films are recorded as a moving picture and this is called an angiogram. The angiogram shows the vessels filling with blood and the sites of any narrowing can be seen.

Coronary Angiogram India, Affordable Coronary Angiography

The tip of the catheter is then put into the other main coronary artery and the test is repeated. So, an angiogram picture is built up of each of the coronary arteries and their branches.

You cannot feel the catheter inside the blood vessels. You may feel an occasional 'missed' or 'extra' heartbeat during the procedure. This is normal and of little concern. During the procedure your heartbeat is monitored by electrodes placed on your chest which provide a tracing on an ECG machine (electrocardiograph). Sometimes a sedative is given before the test if you are anxious.

When the test is over, the catheter is gently pulled out. If it was inserted through a small cut in the skin in the arm then you will normally need a few stitches. If it was inserted through a wide needle in your groin then a nurse will press over the site of insertion for about 10 minutes to prevent any bleeding.

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How do I prepare for a coronary angiography ?

You should get instructions from your local hospital about what you need to do.

The sort of instructions may include : -


  • If you take warfarin (a 'blood thinning' drug), you will need to stop this for 2-3 days before the test. (This prevents excessive bleeding from the site of the catheter insertion.)
  • If you take insulin or drugs for diabetes, the timing of when to take these on the day of the test may need to be clarified.
  • If you may be pregnant, you need to tell the doctor who will do the test.
  • You may be asked to stop eating and drinking for a few hours before the test.
  • You may be asked to shave both groins before the test.
  • You will have to sign a consent form at some point before the test to confirm that you understand the procedure, understand the possible complications (see below), and agree to the procedure being done.


How long does coronary angiography take ?

It usually takes about 30 minutes. In most cases it is done as a day-case procedure.

After the test : -


  • The doctor will discuss what he or she found during the test. A letter is also sent to your GP giving details of the test results.
  • You will need to rest for a few hours after the test. You should ask a friend or relative to accompany you home. Most people are able to resume their normal activities the next day.
  • There may be some bruising at the site of the catheter insertion which may be a little sore when the anaesthetic wears off. Painkillers such as paracetamol will help to ease this.
  • You may need to have some stitches removed after about seven days if a small cut was made to insert the catheter.


Are there any risks or side-effects ?

  • One problem is that a bruise may form under the skin where the catheter was inserted (usually the groin). This is not serious, but it may be sore for a few days.
  • The small wound where the catheter is inserted sometimes becomes infected. Tell your GP if the wound becomes red and tender. A short course of antibiotics will usually deal with this if it occurs.
  • Some people get a short angina-type pain during angiography. This soon goes.
  • The dye may give you a hot, flushing feeling when it is injected. Many people also describe a warm feeling in the groin when the dye is injected - as if they have "wet themselves". These feelings last just a few seconds (and the operator will tell you when they are about to inject the dye). Rarely, some people have an allergic reaction to the dye.
  • Serious complications are rare, but do sometimes occur. The risk is mainly in people who already have serious heart disease. Your doctor will only recommend coronary angiography if they feel the benefits outweigh the small risk. Potential serious complications are : -
    • A heart attack occurring during the procedure.
    • The catheter may damage a coronary artery. If this occurs, the artery may be repaired by emergency heart surgery.
    • A stroke.
    • Rarely, some people die during this procedure as a consequence of one of these serious complications.


The list of of world class heart hospitals in India is as follows : -


Apollo Hospitals Bangalore Apollo Hospitals, Bangalore, India
Apollo Hospital Chennai Apollo Hospital, Chennai, India
Apollo Hospitals Hyderabad Apollo Hospitals, Hyderabad, India
Apollo Hospitals Delhi Indraprastha Apollo Hospital, Delhi, India
Apollo Hospitals Kolkata Apollo Gleneagles Hospital, Kolkata, India
Wockhardt Hospital Bangalore India Wockhardt Hospital, Bangalore India
Wockhardt Hospital hyderabad, India Wockhardt Hospital, hyderabad, India
Wockhardt Hospital Mumbai, India Wockhardt Hospital, Mumbai, India
Fortis Hospital, Delhi, India Fortis Hospital, Delhi, India
Fortis Hospital Mohali, India Fortis Hospital, Mohali, India
Fortis Hospital Noida, India Fortis Hospital, Noida, India
Escorts Heart Institute Hospital, Delhi, India Escorts Heart Institute Hospital, Delhi, India
Narayana Hrudayalaya Heart Hospital, Bangalore, India Narayana Hrudayalaya Heart Hospital, Bangalore, India
Artemis Hospital, Gurgaon ( Delhi ) , India Artemis Hospital, Gurgaon ( Delhi ) , India
Max Devki Devi Heart and Vascular  hospital,  Delhi, India Max Devki Devi Heart and Vascular hospital, Delhi, India
BGS Global Hospital Bangalore, India BGS Global Hospital, Bangalore, India
BGS Global Hospital Chennai, India BGS Global Hospital, Chennai, India
BGS Global Hospital Hyderabad, India BGS Global Hospital, Hyderabad, India


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