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Related Experiment Video

Updated: Sep 8, 2025

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Published on: February 13, 2021

Simulation of Repair on Dynamic Patient-Specific Left Atrioventricular Valve Models.

Stephen Ching¹, Christopher Zelonis¹, Christian Herz¹

¹Children's Hospital of Philadelphia, Department of Anesthesia and Critical Care Medicine, Philadelphia, PA.

|August 20, 2025

Summary

This summary is machine-generated.

This study developed a physical simulation platform to test left atrioventricular valve (LAVV) repair strategies in pediatric patients. The platform showed potential for refining surgical techniques for congenital heart disease before clinical use.

Keywords:

3D printing complete atrioventricular canal congenital patient-specific modeling simulation valve repair

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Last Updated: Sep 8, 2025

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Area of Science:

Cardiovascular Surgery
Biomedical Engineering
Pediatric Cardiology

Background:

Congenital heart defects, such as atrioventricular canal defects, often require surgical repair of the atrioventricular valve.
Left atrioventricular valve (LAVV) regurgitation is a common complication after repair of atrioventricular canal defects.
Assessing the efficacy of different LAVV repair strategies in pediatric patients is challenging due to anatomical variations and the need for patient-specific solutions.

Purpose of the Study:

To develop and evaluate a dynamic, image-derived, patient-specific physical simulation platform.
To assess the effectiveness of various left atrioventricular valve (LAVV) repair strategies.
To provide a preclinical evaluation tool for pediatric patients with repaired atrioventricular canal defects.

Main Methods:

3D transesophageal echocardiographic images were used to create patient-specific silicone valve molds.
Custom software (SlicerHeart) was employed for image segmentation and mold generation.
Fabricated valve models were tested in a pulse duplicator under simulated physiological conditions to compare repair techniques.

Main Results:

Manufacturing consistency was high for annular metrics but lower for leaflet closure metrics.
In one patient, cleft closure and an Alfieri stitch eliminated regurgitation, but the Alfieri stitch increased pressure gradient.
In the second patient, a combination of patch augmentation and commissuroplasty minimized regurgitant area.

Conclusions:

A dynamic physical simulation platform for preclinical LAVV repair evaluation is feasible.
Challenges exist in accurately modeling leaflet closure and chordal mechanics.
This platform holds potential for refining surgical strategies, especially for heterogeneous pediatric congenital heart disease populations.