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Left ventricular size and function in double inlet left ventricle.

G Isabella1, L Daliento, R Chioin

  • 1Padua University School of Medicine, Division of Cardiology, Italy.

International Journal of Cardiology
|October 1, 1988
PubMed
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Left ventricular size and function in double inlet left ventricle patients change with age and surgery. Ventricular volume adequacy for septation varies, while ejection fraction remains stable in children up to 15 years.

Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease
  • Cardiac Imaging

Background:

  • Double inlet left ventricle (DILV) is a complex congenital heart defect.
  • Understanding ventricular dynamics is crucial for surgical planning and patient management.

Purpose of the Study:

  • To evaluate changes in left ventricular size and function in DILV patients.
  • To assess the impact of age and palliative surgery on ventricular volume and performance.
  • To differentiate outcomes based on pulmonary flow restriction.

Main Methods:

  • Quantitative cineangiography in 15 DILV patients (1 day to 15 years).
  • Calculation of ventricular volumes using Simpson's rule.
  • Assessment of ejection fraction and systolic pressure to end-systolic volume ratio.

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Main Results:

  • Ventricular size inadequate for septation in pulmonary flow restriction, but improves post-shunting.
  • Adequate volume for septation in non-restricted patients initially, but may decrease post-pulmonary artery banding.
  • Ejection fraction is slightly lower than in biventricular hearts but stable with age.
  • Systolic pressure to end-systolic volume ratio is stable with age but affected by excessive pulmonary flow or valvar regurgitation.

Conclusions:

  • Ventricular volume dynamics in DILV are significantly influenced by pulmonary flow status and surgical interventions.
  • Left ventricular function, assessed by ejection fraction, demonstrates resilience throughout childhood in DILV patients.
  • Palliative surgical strategies require careful consideration of their impact on ventricular growth and hemodynamics.