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Updated: Feb 7, 2026
10:05
Anatomically Realistic Neonatal Heart Model for Use in Neonatal Patient Simulators
Published on: February 5, 2019
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Region-Specific Microstructure in the Neonatal Ventricles of a Porcine Model
Annals of Biomedical Engineering
|July 18, 2018
Summary
This study quantifies microstructural parameters in 1-day-old piglet hearts, revealing significant differences in tissue organization between ventricles and regions. These findings are crucial for developing accurate computational models of the neonatal heart.
Area of Science:
- Cardiovascular Physiology
- Biomedical Engineering
- Developmental Biology
Background:
- Neonatal circulation undergoes rapid adaptation at birth, transitioning from placental to pulmonary oxygen supply.
- Incomplete cardiac development can lead to poor circulation, impacting infant survival rates.
- Accurate characterization of the neonatal heart's microstructure is essential for understanding normal and abnormal development.
Purpose of the Study:
- To quantify region-specific microstructural parameters in the 1-day-old neonatal heart.
- To establish a foundation for enhanced mathematical and computational simulations of the young heart.
- To investigate variations in tissue organization within the neonatal ventricles.
Main Methods:
- Dissection of 1-day-old Yorkshire piglet hearts.
- Three-dimensional diffusion-tensor magnetic resonance imaging (3D DTI) to measure fractional anisotropy (FA).
- Two-photon excited fluorescence and second-harmonic generation microscopy to analyze cardiomyocyte and collagen fibril structures.
Main Results:
- Fractional anisotropy (FA) varied significantly across ventricular regions, with the highest values at the equator.
- Right ventricular FA was statistically greater than left ventricular FA in all regions.
- Cardiomyocyte and collagen fiber rotation was greatest in the anterior walls, with less dispersion compared to posterior walls.
Conclusions:
- This study provides critical microstructural data for the 1-day-old heart.
- The quantified parameters offer a valuable platform for developing and validating computational models of the neonatal heart.
- Understanding these parameters is key to investigating congenital heart defects and improving outcomes.
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