Echocardiography is an imaging test. It uses sound waves to make detailed pictures of the heart.
The test can be done in two ways.
- Transthoracic echo (TTE). This method uses a hand-held wand called a transducer. The healthcare provider moves it across the chest over the area where the heart is. The transducer sends and receives sound waves that are changed into images.
- Transesophageal (TEE) echo. The test may be done by passing a transducer down through the esophagus. The esophagus is the tube leading from the throat to the stomach. Because the esophagus sits right behind the heart, TEE provides better imaging detail than the transthoracic echo.
- Intracardiac echocardiography (ICE). This type of echocardiography is done with probes as part of a cardiac catheterization and does not require general anesthesia as TEE sometimes does.
- Doppler. This shows blood flow through the heart.
- Color Doppler. This shows color images to better see blood flow.
- 3-D. This gives 3 views of the heart.
- Stress echocardiography. This shows what the heart does under stress from medicine or exercise.
Echocardiography is an important imaging test for heart problems in infants and children. It may help diagnose problems your child was born with (congenital). Or it may help diagnose a problem that has developed (acquired). Below are reasons for having echocardiography.
- Signs or symptoms that may mean a heart problem. These might be a bluish color of the skin (cyanosis) or a heart murmur.
- Checking the heart because of other congenital problems
- Family history of congenital heart disease
- Other abnormal test results
- Infections or other conditions that may affect the heart
- High blood pressure
- Irregular heartbeats
- Your child won’t need to do anything special before an echocardiogram.
- If your child is old enough to understand, explain that he or she will have to lie still to have pictures taken.
- He or she may have medicine to go to sleep for a transesophageal echo. It’s sometimes needed for transthoracic echo, especially for younger children.
- Make sure your child knows that the procedure doesn’t cause pain.
- Most of the time, you can stay with your child during the exam.
- Your child may also be able to hold a toy or watch TV or a movie during the exam.
- For any special instructions, talk with your child’s provider or the facility.
The echo may be done in a cardiologist’s office, at a hospital, or at an imaging facility. It takes about 45 to 60 minutes for a transthoracic echo. A specially trained technician (cardiac sonographer) usually does the test. The steps are:
- Your child will lie down on an exam table in a room with the lights dimmed.
- The technician will put gel on your child's chest to help the transducer move.
- The technician will put the transducer on the chest and move it around to get the heart images. Your child will feel slight pressure of the probe as it’s moved around the chest.
- The images display on a computer screen.
Your child will need sedation if he or she is having a transesophageal echo. For this test, the transducer is passed into your child’s mouth, throat, and into the esophagus. A bite protector will be placed in your child's mouth. Vital signs including heart rate, blood pressure, and oxygen levels will be monitored. Once your child is sedated enough, the TEE probe will be inserted into the esophagus. This test lasts about 15 minutes.Once the test is done, the technician wipes the gel from the chest. If your child had sedation, he or she is watched until awake. A pediatric cardiologist reviews the images at some point after the exam. Depending on the results of the echo, your child may need other tests or procedures. Some children have a sore throat for a day or 2 after a TEE procedure.
Before you agree to the test or the procedure for your child make sure you know:
- The name of the test or procedure
- The reason your child is having the test or procedure
- What results to expect and what they mean
- The risks and benefits of the test or procedure
- When and where your child is to have the test or procedure
- Who will do the procedure and what that person’s qualifications are
- What would happen if your child did not have the test or procedure
- Any alternative tests or procedures to think about
- When and how will you get the results
- Who to call after the test or procedure if you have questions or your child has problems
- How much will you have to pay for the test or procedure
October 26, 2017
Feigenbaum Harvey, MD, FASE. Role of M-mode Technique in Today’s Echocardiography. Journal of the American Society of Echocardiography. 2010; 23(3):240–257., Kothavale Avinash A. A Systematic Approach to Performing a Comprehensive Transesophageal Echocardiogram: A Call to Order. BioMedCentral Cardiovascular Disorders. 2009; 9(18):1–12., Bartel, Thomas, Why is intracardiac echocardiography helpful? Benefits, costs and how to learn, European Heart Journal (2014); 35(2); 69-76
Kang, Steven, MD,Bass, Pat F., III, MD, MPH