You should not eat or drink for 8 hours before the test. (Your doctor or nurse may give you different directions.)

The procedure will take place in the hospital. You may be admitted the night before the test, but it is common to come to the hospital the morning of the procedure.

Your health care provider will explain the procedure and its risks. You must sign a consent form.

You will be given sedation to help you relax before the procedure, but you will be awake and able to follow instructions during the test.

You will be given local numbing medicine (anesthesia) before the catheter is inserted. You will feel some pressure as the catheter is inserted, but you should not feel any pain. You may have some discomfort from lying still for a long period of time.

The procedure is done to evaluate:

• Cardiac valve disease
• Cardiac tumors
• Heart defects (such as ventricular septal defects)
• Heart function

The procedure may also be done to repair certain types of heart defects, or to open a clogged heart valve.

When this procedure is done with coronary angiography, it can open blocked arteries or bypass grafts.

The procedure can also be used to:

• Collect blood samples from the heart
• Determine pressure and blood flow in the heart's chambers
• Examine the arteries of the heart (coronary angiography)
• Take x-ray pictures of the left side of the heart (ventriculography)

Images

Left heart catheterization

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Review Date: 07/10/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Michael A. Chen, MD, PhD, Assistant Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)