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PubMed This is a summary of 12 peer-reviewed journal articles Updated
Pediatric Cardiology

Long-Term Health and Monitoring After Repair

At a Glance

After pAVSD surgery, patients require lifelong cardiology monitoring for potential complications like valve leakage, outflow tract narrowing, and arrhythmias. Most children need dental antibiotics for six months post-surgery, with ongoing visits to ensure the heart continues to function properly.

For most children, the surgical repair of partial atrioventricular septal defect (pAVSD) is a one-time procedure that leads to a healthy, active life. However, because the heart’s architecture was altered, your child will need lifelong “surveillance”—regular checkups to ensure the heart continues to function correctly as it grows.

Key Areas of Long-Term Monitoring

While the hole is closed and the valve is stitched, the heart must be monitored for three specific long-term developments:

  • Left Atrioventricular Valve Regurgitation (LAVVR): The “cleft” that was stitched during surgery can sometimes leak over time [1]. If this leakage becomes moderate or severe, it may strain the heart and is the most common reason a child might need a second surgery (reoperation) [2][3].
  • Left Ventricular Outflow Tract Obstruction (LVOTO): In some children with pAVSD, the area below the aortic valve is naturally narrow. Over time, extra tissue can grow there, creating a “speed bump” that makes it harder for blood to leave the heart [4][5].
  • Arrhythmias: Because the heart’s electrical wiring was slightly displaced, some patients develop irregular heart rhythms—like atrial fibrillation—years or even decades after their surgery [6][7].

Protecting the Heart: Antibiotics and the Dentist

The American Heart Association (AHA) provides specific guidelines for preventing infective endocarditis (an infection of the heart’s lining or valves). Because surgery uses a patch to close the hole, your child’s heart is temporarily more susceptible to bacteria.

  • The 6-Month Rule: For most children, antibiotic prophylaxis (taking an antibiotic before a dental cleaning) is required for the first 6 months after surgery while the heart tissue naturally grows over the patch [8][9].
  • The “Residual” Exception: Your child only needs lifelong antibiotics for dental work if there is a residual defect (a leak) specifically located at or adjacent to the prosthetic patch, or if prosthetic material was used during the valve repair [8][9]. A mild leak on the native valve itself does not require lifelong antibiotics.

Surveillance Schedule

While your cardiologist will set a specific plan, the following is a typical monitoring framework for a child after pAVSD repair:

  • First Year Post-Op: 1, 3, 6, and 12-month visits to ensure the patch is secure and the valve is healing [10].
  • Years 2 - 5: Annual or bi-annual visits to monitor for the development of LVOT narrowing or valve leakage [4].
  • Adolescence & Beyond: Annual or every 2 years for long-term monitoring for arrhythmias and valve durability into adulthood [11][12].

Staying Empowered

It is helpful to keep a “Heart Passport”—a small folder containing your child’s most recent echocardiogram report and the specific details of the surgery. This ensures that any doctor your child sees in the future understands their unique anatomy and the presence of any prosthetic material [10].

Return to Home

Common questions in this guide

How long does my child need antibiotics for the dentist after pAVSD surgery?
Most children require antibiotics before dental procedures for the first six months after surgery while the heart tissue heals over the surgical patch. Lifelong antibiotics are only necessary if there is a residual leak near the patch or if prosthetic material was used during valve repair.
What are the most common long-term complications after pAVSD repair?
The most common long-term issues include left atrioventricular valve regurgitation (LAVVR), which is a leaking valve. Other potential issues include narrowing below the aortic valve and irregular heart rhythms that can develop years later.
Will my child need a second heart surgery after pAVSD repair?
While the initial repair is intended to be a one-time procedure, a second surgery may be required if moderate or severe valve leakage develops as the child grows. Routine echocardiograms help monitor this risk.
How often will my child need to see a cardiologist after surgery?
During the first year, visits typically occur at 1, 3, 6, and 12 months post-surgery. Monitoring then transitions to annual or bi-annual visits for years two through five, and continues regularly into adulthood.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.What is the current grade of mitral valve regurgitation (LAVVR) seen on my child's latest post-operative echo?
  2. 2.Does my child have a specific residual defect or prosthetic ring that requires lifelong antibiotics for dental work, or do we stop at 6 months?
  3. 3.Are there any signs of narrowing in the area below the aortic valve (LVOT)?
  4. 4.At what point would my child be able to transition from visits every few months to once a year?
  5. 5.What specific physical signs of an irregular heart rhythm should I be looking for at home as my child grows?

Questions For You

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References

References (12)
  1. 1

    Surgical Outcomes in Children With Partial and Transitional Atrioventricular Septal Defect.

    Nakayama Y, Shinkawa T, Hoki R, et al.

    World journal for pediatric & congenital heart surgery 2022; (13(4)):451-457 doi:10.1177/21501351221100140.

    PMID: 35757952
  2. 2

    Evaluation of mid-term outcomes of partial and intermediate atrioventricular canal defect surgery.

    Altin HF, Korun O, Cicek M, et al.

    Cardiology in the young 2024; (34(12)):2610-2618 doi:10.1017/S1047951124026350.

    PMID: 39397749
  3. 3

    Long-term outcomes of reoperations following repair of partial atrioventricular septal defect.

    Buratto E, Ye XT, Bullock A, et al.

    European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2016; (50(2)):293-7 doi:10.1093/ejcts/ezw018.

    PMID: 26920940
  4. 4

    Surgical treatment of recurrent subvalvular discrete membrane and left ventricular outflow tract stenosis in an adult patient with a history of congenital cardiac surgery.

    Kahraman N, Topal D, Coşkun G, et al.

    Echocardiography (Mount Kisco, N.Y.) 2023; (40(3)):279-284 doi:10.1111/echo.15531.

    PMID: 36721975
  5. 5

    Left ventricular outflow tract obstruction caused by abnormal mitral valve tendinous Chordae manifesting in the extremely remote period after surgery for partial atrioventricular septal defect: a case report.

    Kawamoto T, Kogure T, Shinkawa T, et al.

    European heart journal. Case reports 2025; (9(11)):ytaf539 doi:10.1093/ehjcr/ytaf539.

    PMID: 41246225
  6. 6

    Partial atrioventricular septal defect associated with wolff-parkinson-white syndrome: Perioperative dysrhythmias during the intracardiac repair.

    Mammen A, Tewari P, Horo P, Pande S

    Annals of cardiac anaesthesia 2021; (24(4)):479-482 doi:10.4103/aca.ACA_49_20.

    PMID: 34747759
  7. 7

    A hol(e)y predicament.

    Meka SG, Shelden D, Mertens A, et al.

    Respirology case reports 2017; (5(4)):e00237 doi:10.1002/rcr2.237.

    PMID: 28435681
  8. 8

    Infective Endocarditis Antibiotic Prophylaxis: Review of the Evidence and Guidelines.

    Pries-Heje MM, Bundgaard H, Iversen KK, et al.

    Current cardiology reports 2023; (25(12)):1873-1881 doi:10.1007/s11886-023-02002-5.

    PMID: 38117447
  9. 9

    Antibiotic Prophylaxis and Infective Endocarditis Incidence Following Invasive Dental Procedures: A Systematic Review and Meta-Analysis.

    Sperotto F, France K, Gobbo M, et al.

    JAMA cardiology 2024; (9(7)):599-610 doi:10.1001/jamacardio.2024.0873.

    PMID: 38581643
  10. 10

    Repair of Partial Atrioventricular Septal Defects in Adults: A Single Center Experience.

    Patlolla SH, Dearani JA, Connolly HM, et al.

    Seminars in thoracic and cardiovascular surgery 2021; (33(2)):469-478 doi:10.1053/j.semtcvs.2020.08.009.

    PMID: 32858219
  11. 11

    Repair of partial atrioventricular canal defect in adult patients: two-year follow-up outcomes of a retrospective study.

    Song L, Ling Y, An Q

    Journal of cardiothoracic surgery 2019; (14(1)):106 doi:10.1186/s13019-019-0931-x.

    PMID: 31186038
  12. 12

    Outcomes of Atrioventricular Septal Defect Repair: Two-Institutions, 10-Year Experience in Cordoba, Argentina.

    Juaneda I, Pizzulli L, Ferrari P, et al.

    World journal for pediatric & congenital heart surgery 2025; (16(4)):509-515 doi:10.1177/21501351241305135.

    PMID: 39885724

This page provides general information about long-term care following pAVSD repair for educational purposes. It does not replace professional medical advice. Always consult your pediatric cardiologist regarding specific monitoring schedules or antibiotic requirements.

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