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Exercise performance after univentricular palliation.

Sachin Talwar1, Manikala Vinod Kumar2, Vishnubhatla Sreenivas3

  • 1Department of Cardiothoracic and Vascular Surgery, Cardiothoracic Centre, All India Institute of Medical Sciences, New Delhi, India.

Annals of Pediatric Cardiology
|February 15, 2018
PubMed
Summary
This summary is machine-generated.

Exercise performance in univentricular palliation varies by surgical approach. Total cavopulmonary connection (TCPC) generally shows better exercise capacity than bidirectional Glenn (BDG) procedures, with fenestrated TCPC offering potential advantages.

Keywords:
Bidirectional Glennexercise performancefontan operationsingle ventricle

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Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease
  • Cardiac Surgery

Background:

  • The optimal surgical strategy for univentricular palliation remains debated, particularly concerning the timing and necessity of staged procedures.
  • Understanding exercise performance is crucial for assessing functional outcomes in patients with complex congenital heart disease.

Purpose of the Study:

  • To evaluate and compare the exercise performance across different surgical techniques used in univentricular palliation.
  • To identify factors influencing exercise capacity in patients who have undergone bidirectional Glenn (BDG) or Fontan (total cavopulmonary connection [TCPC]) procedures.

Main Methods:

  • A retrospective and prospective comparative study involving 117 patients who underwent exercise testing between January 2012 and June 2015.
  • Patients were categorized based on surgical procedures: bidirectional Glenn (BDG) or total cavopulmonary connection (TCPC), with further subgroup analysis for TCPC variations (extracardiac, lateral tunnel, fenestrated, nonfenestrated).
  • Statistical analysis included Student's t-test, Wilcoxon rank-sum test for continuous data, and Pearson's Chi-square test for qualitative data.

Main Results:

  • No significant difference in exercise parameters was found between BDG patients with or without open antegrade pulmonary blood flow (APBF), despite higher oxygen saturations (SpO2) in the APBF group.
  • Extracardiac TCPC patients exhibited superior exercise capacity and increased SpO2 during exercise compared to lateral tunnel TCPC patients.
  • Fenestrated TCPC patients demonstrated higher metabolic equivalents (METs) consumption, fewer pleural effusions, and shorter hospital stays compared to nonfenestrated TCPC patients.

Conclusions:

  • While BDG with or without APBF showed no difference in exercise parameters, TCPC procedures, particularly extracardiac and fenestrated variations, appear to offer better exercise capacity.
  • Fenestrated TCPC was associated with improved outcomes, including higher exercise capacity and fewer complications, compared to nonfenestrated approaches.
  • Overall, patients undergoing TCPC demonstrated enhanced exercise capacity compared to those solely undergoing BDG.