Pulmonary and ventricular functions in children with repaired tetralogy of Fallot

Savaş Demirpençe1, Barış Güven2, Murat Muhtar Yılmazer3

  • 1Department of Pediatric Cardiology, Sifa University Faculty of Medicine, Izmir, Turkey. savasdemirpence@yahoo.com.

Insights

Children with repaired Tetralogy of Fallot (TOF) show impaired ventricular and lung function. Right ventricular myocardial performance index (MPI), FEV1, FVC, and 6-minute walking test (6MWT) distance are key indicators for follow-up.

Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease Research
  • Cardiopulmonary Function Assessment

Background:

  • Tetralogy of Fallot (TOF) is a complex congenital heart defect requiring surgical repair.
  • Long-term outcomes and functional status in repaired TOF patients require ongoing evaluation.
  • Assessing biventricular function, respiratory capacity, and exercise tolerance is crucial for managing these patients.

Purpose of the Study:

  • To evaluate biventricular function, brain natriuretic peptide levels, respiratory function, and 6-minute walking test (6MWT) distance in children with repaired TOF.
  • To analyze the correlation between these functional parameters and the clinical status of children post-TOF repair.
  • To identify potential biomarkers for monitoring long-term health in repaired TOF pediatric population.

Main Methods:

  • A comparative study involving 25 children with repaired TOF and 25 healthy controls.
  • Utilized Tissue Doppler echocardiography to assess biventricular myocardial performance indices (MPIs) and timings.
  • Measured respiratory function (spirometry including FVC, FEV1, FEF25-75, and inspiratory capacity) and 6MWT distance.

Main Results:

  • Children with repaired TOF exhibited significantly higher right and left ventricular MPIs and altered ventricular timings compared to controls.
  • Significantly reduced spirometry parameters (FVC, FEV1, FEF25-75) and inspiratory capacity were observed in the repaired TOF group.
  • Repaired TOF patients demonstrated significantly lower 6MWT distances, with right ventricular MPI correlating with FEV1, FVC, and 6MWT distance.

Conclusions:

  • Repaired Tetralogy of Fallot is associated with impaired biventricular and pulmonary functions.
  • Right ventricular MPI, alongside FEV1, FVC, and 6MWT distance, may serve as valuable tools for monitoring children post-TOF repair.
  • These functional parameters can aid in the comprehensive follow-up and management of pediatric patients with repaired TOF.
Abstract

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