Fetal echocardiography
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Fetal echocardiography

Definition

Fetal echocardiography is a test that uses sound waves (ultrasound) to evaluate the baby’s heart for problems before birth.

How the Test is Performed

Fetal echocardiography is a test that is done while the baby is still in the womb. It is usually done during the second trimester of pregnancy, when the woman is about 18 – 24 weeks pregnant.

The procedure is similar to that of a pregnancy ultrasound. You will lie down for the procedure.

The test can be performed on your belly (abdominal ultrasound) or through your vagina (transvaginal ultrasound).

In an abdominal ultrasound, the person performing the test places a clear, water-based gel on your belly and then moves a hand-held probe over the area. The probe sends out sound waves, which bounce off the baby’s heart and create a picture of the heart on a computer screen.

In a transvaginal ultrasound, a smaller probe is inserted into the vagina. A transvaginal ultrasound can be done earlier in the pregnancy and produces a clearer image than an abdominal ultrasound.

How to Prepare for the Test

No special preparation is needed for this test.

How the Test Will Feel

The conducting gel may feel slightly cold and wet. You will not feel the ultrasound waves.

Why the Test is Performed

This test is done to detect a heart problem before the baby is born. It can provide a more detailed image of the baby’s heart than a regular pregnancy ultrasound.

The test can show:

  • Blood flow through the heart
  • Heart rhythm
  • Structures of the baby’s heart

The test may be done if:

  • A sibling or other family member had a heart defect or heart disease
  • A routine pregnancy ultrasound detected an abnormal heart rhythm or heart problem in the unborn baby
  • The mother has type 1 diabetes, lupus, or phenylketonuria
  • The mother has rubella during pregnancy
  • The mother abused drugs or alcohol during pregnancy
  • The mother has been exposed to drugs that can damage the baby’s developing heart (such as some epilepsy drugs and prescription acne medications)
  • An amniocentesis revealed a chromosome disorder

Normal Results

The echocardiogram finds no problems in the unborn baby’s heart.

What Abnormal Results Mean

Abnormal results may be due to:

The test may need to be repeated.

Risks

There are no known risks to the mother or unborn baby.

Considerations

Some heart defects cannot be seen before birth, even with fetal echocardiography. These include small holes in the heart or mild valve problems. Sometimes it may not be possible to see every part of the large blood vessels leading out of the baby's heart.

If the health care provider finds a problem in the structure of the heart, a detailed ultrasound may be done to look for other problems with the developing baby.

References

Jone PN, Schowengerdt KO Jr. Prenatal diagnosis of congenital heart disease. Pediatr Clin North Am. 2009 Jun;56(3):709-15

Maeno Y, Hirose A, Kanbe T, Hori D. Fetal arrhythmia: prenatal diagnosis and perinatal management. J Obstet Gynaecol Res. 2009 Aug;35(4):623-9.

Sekar P, Hornberger LK. The role of fetal echocardiography in fetal intervention: a symbiotic relationship. Clin Perinatol. 2009 Jun;36(2):301-27, ix.


Review Date: 2/15/2011
Reviewed By: Kimberly G Lee, MD, MSc, IBCLC, Associate Professor of Pediatrics, Division of Neonatology, Medical University of South Carolina, Charleston, SC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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