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Learning Center
Tetralogy of Fallot
These four heart problems present at birth change how blood flows through the body. Know the symptoms and treatment.
Tongue-tie (ankyloglossia)
With tongue-tie (ankyloglossia), a band of tissue (frenulum) tethers the tongue, restricting the range of motion. Learn about symptoms and treatment.
Tonic-clonic (grand mal) seizure
Learn about this type of seizure that can cause convulsions. Also know how to help if you see someone having one.
Total anomalous pulmonary venous return (TAPVR)
In this congenital heart condition, the lung's blood vessels attach to the wrong places in the heart. Know the symptoms and how it's diagnosed.
Toxoplasmosis
Learn about symptoms, causes, treatment and prevention of this parasitic infection that can cause severe disease.
Transposition of the great arteries
This serious, rare heart problem present at birth requires surgery to correct. Learn about its symptoms and treatment.
Trichomoniasis
This common sexually transmitted infection is caused by a parasite. Reduce your risk by using condoms when you have sex.
Tricuspid atresia
Learn how this congenital heart defect blocks blood flow from the heart to the lungs. Treatment involves multiple surgeries.
Tricuspid valve regurgitation
A leaky tricuspid valve may make you feel tired and have difficulty exercising. Learn how this type of heart valve disease is diagnosed and treated.
Triple X syndrome
Females with this genetic disorder have three X chromosomes instead of two. Symptoms can be mild or include developmental delays and learning disabilities.
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