Coronary Angiography (literally “taking pictures of the blood vessels of the heart”) is an invasive procedure performed in hospital after appropriate evaluation, to identify any narrowings or blockages of the heart arteries.
Why is Coronary Angiography performed?
Coronary angiography is performed to show the amount of disease or narrowing to the heart or coronary arteries. This may help establish the cause of symptoms such as chest pain, shortness of breath or other problems. It also helps to establish the best way to treat patients’ heart disease.
How is Coronary Angiography performed?
Coronary Angiography is only performed by a suitably trained cardiologist, in a hospital. After an injection of local anaesthetic, a fine tube (catheter) is put into the artery, usually at the top of the leg or at the wrist. The tube is carefully passed into each coronary artery in turn under x-ray guidance.
A series of video pictures is taken using x-rays and a contrast medium (x-ray dye). The contrast medium may be injected into the main pumping chamber of the heart (left ventricle). This is to measure the size of the heart and how well it is pumping. These pictures give us a map of the coronary arteries, which helps us to find out whether you have any narrowing or blockages.
We can then tell you which treatment is best for you. This may be an operation such as coronary by-pass or a procedure called a coronary stent (a very fine metal mesh sleeve put into the artery wall by inflating a small balloon in the artery). Sometimes, medication alone may be a suitable option.
Should I do any special preparation for Coronary Angiography?
Yes. Your cardiologist will usually be the person suggesting you undergo coronary angiography, usually after having performed other tests. You will need to have a blood test a few days before the test. You will be fasting (no breakfast or drinks) on the morning of the test. You will have to tell your cardiologist if you have had a contrast (x-ray dye) reaction before; in this case, special precautions are needed. Your cardiologist may instruct you to take certain blood thinning medication in preparation for a coronary angiogram, and in general you should continue all your usual pills, unless instructed otherwise.
How do I find out what the Coronary Angiography shows?
Your cardiologist will likely either arrange a follow-up appointment or give you the results directly once the Coronary Angiography has been completed and reviewed.
Are there any risks associated with a Coronary Angiography?
Yes. As you might expect with a procedure that involves placing something in the body, there are small risks associated with coronary angiography. These risks depend on how bad your coronary artery disease is, how well your heart is pumping, your general health, how healthy your organs are, and whether you have had previous by-pass surgery.
The risks below are a guide to some of the more serious risks that can happen. These are not the only risks.
Less than 1 in 10,000 people:
- Skin injury from radiation, causing reddening of the skin.
Less than 1 in 1,000 people:
- A stroke. This can cause paralysis and long term disability.
- Heart attack.
- A dangerous reaction to the x-ray contrast medium (dye). This can cause severe reactions such as asthma, shock and convulsions. Death in extremely rare cases – about 1 in 250,000 to 400,000 injections.
- Need for major surgery to the leg at the puncture site.
- Need for emergency heart surgery or angioplasty.
- A higher lifetime risk of cancer from x-ray exposure.
- Death.
Less than 1 in 100 people:
- The heart may not beat with a proper rhythm, which will need urgent treatment.
- Surgical repair of the groin puncture site. This may need a longer stay in hospital.
- Minor reaction to contrast medium such as hives.
- Loss of kidney function due to the contrast medium.
Less than 1 in 20 people:
- Major bruising or swelling at the groin or wrist puncture site.
- Minor bruising.
