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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Pediatric Cardiology

Growing Up with TGA: Long-Term Monitoring and Milestones

At a Glance

While TGA surgery is highly successful, survivors need lifelong monitoring. Long-term care focuses on watching for artery or valve changes, early screening for developmental and motor delays, and transitioning to a congenital heart specialist in adulthood.

The success of the Arterial Switch Operation (ASO) means that most babies born with TGA today will not only survive but will thrive well into adulthood [1]. However, “repaired” does not mean “cured.” Because the heart was surgically remodeled, it requires specialized, lifelong monitoring to ensure that the “new” plumbing continues to function correctly as the child grows [2][3].

Potential Long-Term Heart Changes

While the majority of TGA survivors lead active lives, several specific areas of the heart require regular checkups with a pediatric or adult congenital cardiologist:

  • Neoaortic Root Dilation: Over time, the base of the aorta (the neoaortic root) may widen or “dilate” [4]. While this is common and often harmless, it can eventually cause the aortic valve to leak (regurgitation) [5][6].
  • Pulmonary Branch Stenosis: The most common reason for a “re-intervention” (a second procedure, often using a balloon or stent in a catheterization lab) is a narrowing of the pulmonary arteries [7]. This is frequently seen in the first ten years of life [8].
  • Coronary Artery Health: Because the tiny coronary arteries were moved during surgery, doctors must ensure they continue to grow and provide enough blood to the heart muscle [9]. While rare, narrowing or blockages can occur years later [1].

To monitor these, doctors use echocardiograms (ultrasound) regularly, but as children become teenagers, they often add Cardiac MRI or CT scans to get a more detailed view of the arteries that ultrasound cannot see [10][11].

The Importance of Neurodevelopmental Support

Research has shown that children who undergo major heart surgery as infants have a higher risk for certain developmental and learning challenges [12]. These are not usually related to the child’s intelligence, but rather how the brain processes information.

Common areas where TGA survivors may need extra support include:

  • Executive Function: Challenges with planning, organizing, and completing multi-step tasks [13].
  • Attention: A higher prevalence of ADHD (Attention-Deficit/Hyperactivity Disorder) compared to the general population [14].
  • Motor Skills: Delays in fine motor skills (like handwriting) or gross motor skills (like balance) [12].
  • Emotional Health: Higher rates of anxiety as children reach adolescence [14].

Early intervention is key. Pediatric cardiologists now recommend formal neurodevelopmental screenings at specific milestones (such as age 2 and before starting kindergarten) to catch these challenges early and provide support like speech, physical, or occupational therapy [15][16].

Transitioning to Adult Care

As your child reaches their late teens, their care will move from a pediatric cardiologist to an Adult Congenital Heart Disease (ACHD) specialist [2]. This transition is a critical milestone.

Adults with TGA have unique medical needs that general cardiologists (who mostly treat age-related heart disease) may not be trained to manage [17]. An ACHD specialist understands the specific surgical history of TGA and is trained to monitor for the late-stage complications that can arise in the third or fourth decade of life [3][18]. Ensuring your child understands their own heart history and stays connected to a specialized care team is the best way to protect their health for the long term [2].

Common questions in this guide

Why does my child need lifelong cardiology care after TGA repair?
Even though surgery successfully reroutes blood flow, the surgically remodeled heart requires lifelong monitoring as a child grows. Regular checkups help cardiologists detect and manage late-stage complications, such as artery narrowing or valve leaks, before they become serious.
What long-term heart changes are common years after TGA surgery?
Survivors may experience widening of the neoaortic root, narrowing of the pulmonary arteries, or changes in coronary artery blood flow. Doctors use regular echocardiograms and advanced imaging like MRIs to monitor these areas closely over time.
Are learning and developmental delays common in children with TGA?
Children who undergo major heart surgery as infants face a higher risk for neurodevelopmental challenges. These are usually related to how the brain processes information, and may involve executive function, attention issues like ADHD, or delays in fine and gross motor skills.
When should a child with TGA have a formal neurodevelopmental evaluation?
Pediatric cardiologists typically recommend formal screenings at specific milestones, such as at age 2 and right before starting kindergarten. Catching any challenges early allows families to begin helpful interventions like speech, physical, or occupational therapy.
When should a TGA patient transition to an adult cardiologist?
In their late teens, patients should transition from a pediatric cardiologist to an Adult Congenital Heart Disease (ACHD) specialist. ACHD specialists are uniquely trained to monitor the specific surgical history and late-stage complications of childhood heart surgeries.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.When is the best time for our child to have their first formal neurodevelopmental evaluation?
  2. 2.Based on the specifics of our child's surgery, what signs of neoaortic root dilation or pulmonary stenosis will you be looking for in future checkups?
  3. 3.At what age does your clinic typically begin the transition process to an Adult Congenital Heart Disease (ACHD) specialist?

Questions For You

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References

References (18)
  1. 1

    Management of the Adult with Arterial Switch.

    Breinholt JP, John S

    Methodist DeBakey cardiovascular journal 2019; (15(2)):133-137 doi:10.14797/mdcj-15-2-133.

    PMID: 31384376
  2. 2

    Long-term Outcomes of the Arterial Switch Operation for d-Transposition of the Great Arteries.

    Moe TG, Bardo DME

    Progress in cardiovascular diseases 2018; (61(3-4)):360-364 doi:10.1016/j.pcad.2018.08.007.

    PMID: 30227186
  3. 3

    Long-term Management of the Arterial Switch Patient.

    Kirzner J, Pirmohamed A, Ginns J, Singh HS

    Current cardiology reports 2018; (20(8)):68 doi:10.1007/s11886-018-1012-9.

    PMID: 29946937
  4. 4

    Altered Ascending Aorta Hemodynamics in Patients After Arterial Switch Operation for Transposition of the Great Arteries.

    van der Palen RLF, Deurvorst QS, Kroft LJM, et al.

    Journal of magnetic resonance imaging : JMRI 2020; (51(4)):1105-1116 doi:10.1002/jmri.26934.

    PMID: 31591799
  5. 5

    Evolving concern: Late outcomes after repair of transposition of the great arteries.

    Rocha RV, Barron DJ, Mazine A, et al.

    The Journal of thoracic and cardiovascular surgery 2025; (169(5)):1296-1303.e2 doi:10.1016/j.jtcvs.2024.11.032.

    PMID: 39617321
  6. 6

    Neoaortic outcomes after the arterial switch operation: A systematic review and meta-analysis.

    Negm S, Mahmoud AB, Desnous B, et al.

    Archives of cardiovascular diseases 2026; (119(3)):233-243 doi:10.1016/j.acvd.2025.08.013.

    PMID: 41193284
  7. 7

    30 years' experience with the arterial switch operation: risk of pulmonary stenosis and its impact on post-operative prognosis.

    Sobczak-Budlewska K, Łubisz M, Moll M, et al.

    Cardiology in the young 2023; (33(9)):1550-1555 doi:10.1017/S1047951122002670.

    PMID: 36040409
  8. 8

    Interventions after Arterial Switch: A Single Low Case-Volume Center Experience.

    Jonas K, Jakutis V, Sudikienė R, et al.

    Medicina (Kaunas, Lithuania) 2021; (57(5)) doi:10.3390/medicina57050401.

    PMID: 33919045
  9. 9

    Cardiac Magnetic Resonance Myocardial Perfusion After Arterial Switch for Transposition of Great Arteries.

    Raimondi F, Aquaro GD, De Marchi D, et al.

    JACC. Cardiovascular imaging 2018; (11(5)):778-779 doi:10.1016/j.jcmg.2017.07.015.

    PMID: 29055630
  10. 10

    Pulmonary, aorta, and coronary arteries post-arterial switch in transposition of great arteries: intermediate-term surveillance utilizing conventional echocardiography and cardiac multislice computed tomography.

    Rakha S, Batouty NM, ElDerie AA, Hussein A

    Italian journal of pediatrics 2024; (50(1)):122 doi:10.1186/s13052-024-01686-x.

    PMID: 38926831
  11. 11

    Evaluation of Operated Dextro-Transposition of Great Arteries Patients in Follow-Up: Comparison of Transthoracic Echocardiography and Cardiac CT Angiography.

    Güzelbağ AN, Özyılmaz İ, Kangel D, et al.

    Diagnostics (Basel, Switzerland) 2025; (15(19)) doi:10.3390/diagnostics15192419.

    PMID: 41095637
  12. 12

    Neuroimaging and Neurodevelopmental Outcomes Among Individuals With Complex Congenital Heart Disease: JACC State-of-the-Art Review.

    Phillips K, Callaghan B, Rajagopalan V, et al.

    Journal of the American College of Cardiology 2023; (82(23)):2225-2245 doi:10.1016/j.jacc.2023.09.824.

    PMID: 38030353
  13. 13

    Performance on the ROCF at 8 Years Predicts Academic Achievement at 16 Years in Individuals with Dextro-Transposition of the Great Arteries.

    Fasano-McCarron ME, Bernstein JH, Waber DP, et al.

    Journal of the International Neuropsychological Society : JINS 2021; (27(9)):857-864 doi:10.1017/S1355617720001356.

    PMID: 33441211
  14. 14

    Neurodevelopmental Outcomes for Individuals With Congenital Heart Disease: Updates in Neuroprotection, Risk-Stratification, Evaluation, and Management: A Scientific Statement From the American Heart Association.

    Sood E, Newburger JW, Anixt JS, et al.

    Circulation 2024; (149(13)):e997-e1022 doi:10.1161/CIR.0000000000001211.

    PMID: 38385268
  15. 15

    Correction of d-Transposition of the Great Arteries Sooner Rather Than Later.

    Rollins CK, Newburger JW

    Circulation 2019; (139(24)):2739-2741 doi:10.1161/CIRCULATIONAHA.119.040012.

    PMID: 31180749
  16. 16

    Fetal brain growth and risk of postnatal white matter injury in critical congenital heart disease.

    Peyvandi S, Lim JM, Marini D, et al.

    The Journal of thoracic and cardiovascular surgery 2021; (162(3)):1007-1014.e1 doi:10.1016/j.jtcvs.2020.09.096.

    PMID: 33185192
  17. 17

    Chordal Systolic Anterior Motion of the Mitral Valve in Dextro-Looped Transposition of the Great Vessels After Mustard Procedure.

    Pfirman K, Gleaves E, Donley C, et al.

    The American journal of case reports 2022; (23()):e933703 doi:10.12659/AJCR.933703.

    PMID: 35102129
  18. 18

    External Validation of a Risk Score Model for Predicting Major Clinical Events in Adults After Atrial Switch.

    Albertini M, Santens B, Fusco F, et al.

    Journal of the American Heart Association 2024; (13(9)):e032174 doi:10.1161/JAHA.123.032174.

    PMID: 38686874

This page provides educational information about long-term care and milestones for Transposition of the Great Arteries (TGA). It is not a substitute for professional medical advice from your child's pediatric cardiologist or ACHD specialist.

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