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Updated: Aug 7, 2026

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
Published on: October 28, 2020
The matter of "unbalance" in right dominant atrioventricular septal defect
Ignacio Lugones1, María Fernanda Biancolini2, Germán Lugones3
1Cardiac Surgery Department, "Dr. Pedro de Elizalde" General Children's Hospital, Buenos Aires, Argentina.
Insights
Atrioventricular septal defect unbalance occurs at multiple levels and degrees. Hemodynamic factors are as crucial as dimensional comparisons for surgical decisions.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Disease
- Cardiac Surgery
Background:
- Atrioventricular septal defects (AVSD) present complex anatomical variations.
- Historically, AVSD unbalance assessment focused on ventricular and atrioventricular valve dimensions.
- A comprehensive understanding of AVSD unbalance requires integrating anatomical and hemodynamic perspectives.
Purpose of the Study:
- To emphasize the importance of hemodynamic assessment in atrioventricular septal defect unbalance.
- To advocate for a holistic approach combining anatomical and hemodynamic parameters for surgical planning in AVSD.
Main Methods:
- Review of existing literature on atrioventricular septal defect morphology and hemodynamics.
- Synthesis of anatomical and hemodynamic parameters relevant to AVSD unbalance.
- Conceptual framework development for integrated assessment.
Main Results:
- Unbalance in AVSD can manifest across multiple anatomical levels with varying severity.
- Hemodynamic considerations are critically important, potentially equal in relevance to dimensional analysis.
- Integrating diverse parameters provides a more complete picture of AVSD unbalance.
Conclusions:
- Surgical decision-making for AVSD requires a comprehensive evaluation beyond simple dimensional comparisons.
- Incorporating hemodynamic data alongside anatomical assessments is essential for optimal patient outcomes.
- A unified understanding of AVSD unbalance facilitates improved surgical strategies.
Abstract:
Unbalance in atrioventricular septal defect can be found in more than one anatomic level and in different degrees at each level. The definition of "unbalance" has historically been focused in comparing the dimensions of main cardiac structures, such as the atrioventricular valve and the ventricles. However, the hemodynamic aspects of unbalance need to be considered as having, at least, similar relevance. New concepts and already described parameters must be combined and understood as a whole to help the surgical decision-making process.
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