Left Heart Catheterization: About This Test

Skip to the navigation
The heart

What is it?

Cardiac catheterization is a test to check the left side of your heart. Your doctor might look at the shape of your heart, the motion of your heart, or the blood pressure inside the chambers.

Why is this test done?

This test gives information about how your heart is working. It can:

  • Check blood flow and blood pressure in the chambers of the heart.
  • Check the pumping action of the heart.
  • Find out if a heart defect is present and how severe it is.
  • Find out how well the heart valves work.

What happens during the test?

  • You will get medicine to help you relax.
  • A thin tube called a catheter is put into a blood vessel in the groin or the arm. The doctor moves the catheter through the blood vessel into your heart.
  • You will get a shot to numb the skin where the catheter goes in. You may feel pressure when the doctor moves the catheter through your blood vessel into your heart.
  • Dye may be injected into your heart. Your doctor can watch on special monitors as the dye moves in your heart. The dye helps your doctor see blood flow in your heart.
  • You may feel hot or flushed for several seconds when the dye is put in.
  • If a heart defect is found, cardiac catheterization sometimes is used to correct it during the test.

How long does it take?

  • The test will take about 30 minutes. If a problem is found and the doctor treats it, it can take a few hours longer.

What happens after the test?

  • You will stay in a room for at least a few hours to make sure the catheter site starts to heal. You may have abandage or a compression device on your groin or arm to prevent bleeding.
  • If the catheter was placed in your groin, you may lie in bed for a few hours. If the catheter was put in yourarm, you will need to keep your arm still for at least 1 hour.
  • You may or may not need to stay in the hospital overnight. You will get more instructions for what to do at home.
  • Drink plenty of fluids for several hours after the test.

Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.

Where can you learn more?

Go to https://www.healthwise.net/patientEd

Enter W306 in the search box to learn more about "Left Heart Catheterization: About This Test".