To diagnose some heart conditions, a special dye, known as a contrast medium, may be put into the catheter to make the inside of the heart and blood vessels show up on X-rays. Samples of blood and heart muscle may be taken through the tube. Certain heart problems can be treated during this procedure.
Why is cardiac catheterization done?Often a cardiac catheterization is performed to find out why a patient is having chest pain. The procedure can reveal blocked or narrowed places in the heart's arteries that can cause this pain. During cardiac catheterization, it may be possible to open up the blocked arteries by doing another procedure called angioplasty.
Most people who have heart attacks have arteries that are partly or completely blocked. That is why cardiac catheterizations are often carried out after patients have heart attacks. The procedure can indicate if there are blocked arteries that can be treated with angioplasty or surgery.
Another reason for doing cardiac catheterizations is to look at the overall shape of the heart and its four chambers (the atria and ventricles). This makes it possible to:
What are the risks for cardiac catheterization?Cardiac catheterization is a common medical procedure that rarely causes serious problems. But complications can include:
The risk of complications with cardiac catheterization is higher in:
How to prepare for a cardiac catheterizationBefore having a cardiac catheterization, it is a good idea for the patient to meet with his/her doctor to learn about the procedure and how to prepare for it. In that meeting, the patient might discuss things such as:
What happens during a cardiac catheterization?During a cardiac catheterization, the patient is kept on his/her back and awake. That way the patient can follow instructions given during the procedure. A drug is administered to aid relaxation, which make make the patient sleepy.
A doctor or nurse will numb the area where the small plastic tube (catheter) will enter the blood vessel through a small cut or needle in the arm, upper thigh (groin), or neck. The catheter is then threaded through the vessel and into the chambers of the heart. Special X-ray movies are taken of the tube as it is threaded up into the heart. This helps the doctor see where to put the tube.
Once the catheter is at the right spot, it can be used it to conduct several tests or treatments. Often, special dye is put in the tube to make the inside of the heart's arteries and other structures show up on an X-ray. A procedure called angioplasty may be used to open up the blocked arteries and blood samples may be taken from different parts of the heart or do minor heart surgery.
Once the doctor does all of the needed tests or treatments, the catheter will be taken out. The opening in the blood vessel that the tube went through will then be closed up and bandaged. A small sandbag or other type of weight may be put on top of the bandage to apply more pressure. This will help prevent major bleeding from the site.
What happens after a cardiac catheterization?After a cardiac catheterization, the patient will be moved to a special care area where you will stay for several hours or overnight. While recovering in this area, the patient's movement is limited to avoid bleeding from where the tube (catheter) was inserted. Nurses will check your heart rate and blood pressure regularly. They will also check to see if there is any bleeding from the tube insertion site.
Eventually, a small bruise will appear where the tube was put in. That area may feel sore or tender for about a week. The patient should let his/her doctor know if:
Related categories• HEART TOPICS
• HEALTH AND DISEASE
Source: U.S. National Heart, Lung and Blood Institute
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