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Related Experiment Videos

Ventricular function in the single ventricle before and after Fontan surgery.

S R Parikh1, R A Hurwitz, R L Caldwell

  • 1Division of Pediatric Cardiology, Indiana University Hospitals, Indianapolis.

The American Journal of Cardiology
|June 15, 1991
PubMed
Summary

Ventricular ejection fraction is lower in single ventricle patients and often declines after Fontan surgery, regardless of age or morphology. This highlights the importance of ventricular function in single ventricle outcomes.

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Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease
  • Cardiac Surgery

Background:

  • Single ventricle physiology presents unique challenges in cardiac function assessment.
  • The Fontan procedure is a palliative surgery for complex single ventricle defects.
  • Understanding ventricular function is crucial for predicting outcomes after Fontan surgery.

Purpose of the Study:

  • To evaluate ventricular ejection fraction in single ventricle patients.
  • To assess the relationship between ventricular function and outcomes following the Fontan procedure.
  • To identify factors influencing ventricular function before and after Fontan surgery.

Main Methods:

  • Radionuclide angiocardiography was used to estimate ventricular ejection fraction in 47 single ventricle patients.

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  • Preoperative and postoperative ejection fraction measurements were compared.
  • Patient demographics, ventricular morphology, and surgical factors were analyzed for their correlation with ejection fraction and outcomes.

    • Main Results:

    • Preoperative ejection fraction in single ventricle patients (0.57 ± 0.10) was significantly lower than normal controls (0.68 ± 0.09).
    • Ventricular ejection fraction did not significantly change during childhood or correlate with age or morphology.
    • Postoperative ejection fraction significantly decreased to 0.39 ± 0.11 after Fontan surgery (p < 0.001).

    Conclusions:

    • Single ventricle patients exhibit reduced ventricular ejection fraction compared to normal controls.
    • Ventricular ejection fraction in single ventricle patients is not significantly influenced by age or morphology during childhood.
    • The Fontan procedure is associated with a significant decline in ventricular ejection fraction, underscoring the need for careful monitoring and further research into ventricular function in these patients.