Pediatric Cardiac MRI

A magnetic resonance imaging scan of the heart, called cardiac MRI, is an important tool for diagnosing and even treating congenital heart disease, a heart condition a child is born with.

What is Cardiac MRI?

Cardiac MRI is a noninvasive imaging procedure that uses magnetic technology, not radiation, to create detailed images of the heart. The procedure provides your child’s heart team with high-resolution images of the moving heart and blood vessels, so we can see how the heart looks and functions.

At Children’s National Heart Institute, our specialized hybrid MRI suite combines MRI and cardiac catheterization, allowing us to obtain detailed diagnostic images and perform cardiac catheterizations in the least invasive, safest way possible.

Hybrid Cardiac MRI Suite at Children’s National

Our heart team is pioneering new ways to harness the power of MRI, so we can provide you with the safest, most effective diagnosis and treatment possible. In our hybridsuite, we combine the powerful imaging technology of an MRI with the precision and detail of the catheterization lab.

Features of our cardiac MRI hybrid suite include:

  • Minimal exposure to radiation. Traditional cardiac catheterization uses radiation. While we always use the lowest dose possible, we are working to minimize radiation exposure even more. By using MRI technology to guide a catheterization procedure, we are able to obtain detailed images with minimal or no radiation exposure.  
  • 3-D images. The 3-D MRI technology allows us to take the images we get from the MRI study and view them from every angle. This gives us more information about your child’s condition, helping us treat him or her even better. 
  • Specialized team. Our team consists of pediatric specialists who have dedicated their careers to pediatric heart care. Our experienced cardiac MRI technologists have extensive training in pediatric cardiac imaging. While many heart programs are adult-centered and may also treat children, our focus is entirely on treating infants, children and adolescents.
  • Convenient. If your child needs both an MRI and a catheterization procedure, we may be able to perform them at the same time if your child meets certain criteria. This reduces the amount of sedation your child needs. 
  • Comprehensive evaluation. Echocardiography, an ultrasound for the heart, is a popular, safe diagnostic tool. However, as children get physically bigger, the echo may be less effective. We use cardiac MRI extensively for adolescents and adults with congenital heart disease because it offers the most comprehensive, detailed evaluation available.  
  • Next level of cardiac care. Our team continues to investigate and advance the field of cardiac imaging. We are one of the few hospitals in the world working on capabilities that will allow us to do cardiac interventional procedures in the MRI suite. This will lead to the most minimally invasive and effective procedure for your child.

Cardiac MRI for Children: What to Expect

While every patient differs, here’s a general idea of what you can expect on the day of the procedure:

  • Before your child’s MRI, we will discuss the procedure with you in detail. We encourage you to ask any questions you may have. We will also discuss with you if we are using contrast during the MRI, a material that helps us visualize your child’s heart better.
  • Your child may need sedation, depending on their age and ability to lie still. Parents can wait in the waiting room with a pager, so we can let you know when the procedure is finished.
  • If your child will not be receiving sedation, one parent can be in the room (unless the parent has a health concern that would make it unsafe).
  • We perform the MRI, which takes 45-60 minutes.
  • We discuss the results with you.

Who Needs Cardiac MRI?

We use cardiac MRI to diagnose congenital heart defects and provide noninvasive evaluation for complex conditions, such as:

  • Tetralogy of Fallot
  • Coarctation of the aorta, a narrowing of the aorta
  • Certain rhythm abnormalities (arrhythmias)
  • Cardiomyopathies, diseases of the heart muscle
  • Single ventricle defects, a condition affecting one of the lower chambers of the heart

Contact Us

For more information, call us at 202-476-2020.

Children's Team

Children's Team


Raymond Sze

Division Chief, Diagnostic Imaging and Radiology
Children's Locations that Perform this Procedure

Children's Locations that Perform this Procedure

Treatment Service Locations

Specialty Outpatient Center of Virginia in Loudoun


19415 Deerfield Avenue
Suite 213
Lansdowne, Virginia 20176

main hospital

Main Hospital

111 Michigan Avenue, NW
Washington, District of Columbia 20010

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Cardiac Imaging

Learn more about the advanced cardiac imaging procedures we use to diagnose infants and children in our Heart Institute.


Children’s National Heart Institute, an international leader in comprehensive cardiac care for infants, children, and adults.

Diagnostic Imaging and Radiology

The Division of Diagnostic Imaging and Radiology has a team of expert physicians, board-certified pediatric radiologists, technologists, pediatric anesthesiologists, and nurses, specially trained to provide pediatric radiology services for infants, children, and adolescents.

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