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Pathophysiological aspects after cavopulmonary anastomosis.

M Gewillig1, N Kalis

  • 1Department of Pediatric and Congenital Cardiology, Gasthuisberg University Hospital, University of Leuven, Belgium. marc.gewillig@uz.kuleuven.ac.be

The Thoracic and Cardiovascular Surgeon
|January 6, 2001
PubMed
Summary

The ventricle in single-ventricle hearts shows dysfunction, adapting to abnormal circulations from birth through Fontan-type procedures. Assessing its changing size, shape, and contractility remains challenging.

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Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease
  • Cardiac Physiology

Background:

  • Single-ventricle hearts (SVH) present unique challenges in ventricular assessment.
  • The ventricle in SVH undergoes significant changes due to congenital malformation and palliative surgeries.
  • Assessing ventricular size, shape, hypertrophy, stress, strain, contraction, and relaxation is complex.

Purpose of the Study:

  • To review the adaptive changes and dysfunction of the ventricle in functionally univentricular hearts.
  • To highlight the difficulties in evaluating ventricular mechanics throughout palliative treatment stages.
  • To understand the ventricle's evolution from a shunted state to post-Fontan circulation.

Main Methods:

  • Review of existing literature on ventricular adaptation in single-ventricle physiology.

Related Experiment Videos

  • Analysis of the impact of congenital defects and surgical palliation on ventricular function.
  • Discussion of challenges in quantitative assessment of ventricular parameters.

    • Main Results:

    • The ventricle in SVH is consistently dilated, hypertrophic, and hypocontractile.
    • Ventricular dysfunction stems from intrinsic malformation, prior surgeries, and abnormal hemodynamics.
    • The ventricle adapts by becoming overloaded and overstretched in shunted states, then underloaded and overgrown post-Fontan.

    Conclusions:

    • Ventricular adaptation in SVH involves complex changes in size, contractility, and hemodynamics.
    • Accurate assessment of ventricular function in SVH requires consideration of its dynamic and abnormal physiological environment.
    • Further research is needed to refine methods for evaluating ventricular health in these patients.