Heart and Blood Conditions

Tetralogy of Fallot

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    • For appointments in Seattle, Bellevue, Everett, Federal Way, Olympia, Tri-Cities and Wenatchee, call 206-987-2515.
    • For appointments in Tacoma and Silverdale, call 253-272-1812.
    • For appointments in Alaska, call 907-339-1945.

    If this is a medical emergency, call 911.

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  • Locations +

    • Seattle Children's Main Campus: 206-987-2515
    • Bellevue Clinic and Surgery Center: 425-454-4644
    • Everett: 425-304-6080
    • South Clinic in Federal Way: 253-838-5878
    • Olympia: 360-459-5009
    • South Sound Cardiology Clinics: 253-272-1812
    • Tri-Cities (Richland): 509-946-0976
    • Wenatchee: 509-662-9266
    • Pediatric Cardiology of Alaska: 907-339-1945
    • Seattle Children's doctors provide many cardiac services at regional sites throughout the Pacific Northwest. See our complete list of Heart Center locations.

  • Refer a patient +

    • If you are a provider, fax a New Appointment Request Form (NARF) (PDF) (DOC) to 206-985-3121 or 866-985-3121 (toll-free).
    • No pre-referral work-up is required for most conditions. If you have already done testing such as an EKG, Holter monitor or echocardiogram, please fax this information as well as relevant clinic notes and the NARF to 206-985-3121 or 866-985-3121 (toll-free).
    • Your patient will be seen as quickly as possible by the provider who is the best match for managing the current problem.
    • View our complete Heart Center Referral Information (PDF).

What is tetralogy of Fallot?

Tetralogy of Fallot (pronounced teh-TRAHL-ah-jee of fah-LOH) is a rare, congenital condition that changes the normal flow of blood through the heart.

Tetralogy of Fallot involves 4 birth defects in the heart’s structure:

  1. The first is a large hole in the septum, or wall, between the right and left ventricles. This hole is called a ventricular septal defect. It allows oxygen-poor blood to mix with oxygen-rich blood in the ventricles.
  2. The second is a narrowing (stenosis) of the pulmonary valve. This limits blood flow from the right ventricle to the lungs. It forces some oxygen-poor blood through the ventricular septal defect into the aorta, the artery that carries blood from the heart to the body.
  3. The third problem is a thickening of the muscle wall in the right ventricle (right ventricular hypertrophy). It happens because the right ventricle has to work harder to try to get blood through the pulmonary valve.
  4. The fourth problem is when the aorta leaves the heart from a different spot, right over the ventricular septal defect. This is called overriding aorta. Normally, the aorta leaves the heart from the left ventricle.

Together, the 4 defects limit flow of oxygen-poor blood from the heart to the lungs, where it should pick up oxygen. Instead, oxygen-poor blood leaves the heart and goes out to the rest of the child’s body.

Tetralogy of Fallot

Reprinted with permission www.heart.org. ©2009, American Heart Association, Inc.

Tetralogy of Fallot at Seattle Children’s

Our heart team has treated many children with tetralogy of Fallot. We have years of experience with the surgery these patients require. We also have a pediatric cardiac anesthesia team and a cardiac intensive care unit ready to care for children who go through heart surgery.

When you come to Seattle Children’s, a team of people will take care of your child. Along with your child’s heart doctor (cardiologist), cardiac surgeons, cardiac anesthesiologists, cardiac intensive care specialists, newborn specialists (neonatologists), lung doctors (pulmonologists), advanced nurse practitioners, nurses, child life specialists, social workers and others will care for your child, if their help is needed. We work together to meet all of your child’s health needs and help your family through this experience.

Seattle Children’s has been treating children since 1907. Our team members are trained in their fields and in meeting the unique needs of children. For example, the doctors who give your child sedation (anesthesia) are board certified in pediatric anesthesiology. This means they have extra years of training in how to take care of kids. Our child life specialists know how to help children understand their illnesses and treatments in ways that make sense for their age.

The Adult Congenital Heart Disease Program shared by Children’s and the University of Washington can help with care throughout your child’s life.

Tetralogy of Fallot in Children

In recent years, the diagnosis and treatment of tetralogy of Fallot has improved greatly. Now, most children with this heart defect grow to adulthood and lead active lives.

Tetralogy of Fallot occurs in about 5 in every 10,000 babies. Children with this problem may have other disorders that they are born with (congenital defects), including genetic disorders such as Down syndrome and DiGeorge syndrome.

Contact Us

Contact the Heart Center at 206-987-2015 for a cardiac referral, a second opinion or more information.