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What is a Tee?
An echocardiogram is a test that uses
ultrasound waves to examine the heart. A transesophageal echocardiogram,
or TEE, is an echocardiogram that is done from inside the esophagus
(the tube leading from the mouth to the stomach).
Because the esophagus lies just behind the heart, the TEE provides much clearer images of the heart than a standard echocardiogram, which is performed from
outside the chest.
How Does the TEE Work?
A long prove
(flexible tube) about the width of a
little finger is inserted into the mouth and down the esophagus.
A small transducer at the tip of the prove sends ultrasound waves
that reflect (echo) off the various parts of the heart. The
echoes are converted into moving images of the heart.
The images show the actual shape and movement of the different heart
structures, and the flow of blood through the heart chambers and valves. The images are displayed on a television screen, and can be recorded on videotape.
Why is the TEE Done?
Because it gives images
that are sharp and clear, the TEE is generally performed when doctors want to examine hard-to-see structures of the heart. Here are some situations where a TEE may be done:
- To detect blood clots or masses inside
the heart.
- To assess the severity of some valve
defects.
- To examine prosthetic (artifical) heart
valves.
- To evaluate holes between heart chambers.
- To detect infection of the heart valves.
- To diagnose a dissection (a tear) in
the lining of the aorta (the body's main artery)
- When the standard echocardiogram is of
poor quality or inadequate (suich as in people who are obese or
have chronic lung disease).
Preparing for the Test
Do not eat or drink for 6 hours before the procedure, to make sure that your stomach is empty. You may have sips of water to swallow your medications. If the test is done as an outpatient, have someone drive you to the hospital or clinic. Also, arrange to have someone drive you home after the test. Do not plan to drive yourself home, as you may be drowsy. Be sure to tell the doctor if you have a problem swallowing or if you have any conditions involving your esophagus or stomach.
Also, tell the
doctor or nurse if you have allergies
to medications, especially sedatives (medicines that help you relax.)
Before the test, you'll be given an explanation of the procedure, potential benefits, and possible risks. Feel free to ask questions or share concerns you may have. You'll then be asked to sign a consent form. If you wear dentures or oral prostheses, you will need to remove them, as they may interfere
with the test. An intravenous (IV) line will be inserted into a vein in your arm, to allow injection of medications, such as sedatives or antibiotics.
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