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Related Experiment Video

Updated: Jun 14, 2025

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

How the trabecular layer impacts on left ventricular function.

Ionela Simona Visoiu¹, Bjarke Jensen², Roxana Cristina Rimbas¹

¹Department of Cardiology and Cardiovascular Surgery, SEARCH-VASC Center of Excellence, University of Medicine and Pharmacy Carol Davila, University and Emergency Hospital, Bucharest, Romania.

Journal of Cardiology

|August 30, 2024

Summary

The adult heart's trabecular layer myocardium is functionally similar to the compact layer. This similarity explains why most individuals with increased trabeculation remain asymptomatic, despite variations in heart structure.

Keywords:

Echocardiography Ejection fraction Excessive trabeculation Heart failure Noncompaction

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Last Updated: Jun 14, 2025

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Published on: April 8, 2013

Area of Science:

Cardiovascular Biology
Cardiac Anatomy
Myocardial Physiology

Background:

The ventricular trabecular layer, vital in embryonic development, shows significant individual variation in adults.
Its functional capacity relative to compact myocardium is poorly understood, often assumed to be inferior.
Understanding trabecular function is key to comprehending its role in cardiac pathogenicity.

Purpose of the Study:

To review current knowledge on the natural variation and functional characteristics of the ventricular trabecular layer.
To compare the trabecular myocardium's properties with those of the compact myocardium.
To elucidate the impact of trabeculation on cardiac function and health.

Main Methods:

Narrative review of studies on trabeculation variation.
Analysis of tissue organization, transcriptomics, and immunohistochemistry.
Evaluation of vascularization, electrical propagation, and mechanical function (diastolic and systolic).

Main Results:

Adult trabecular and compact myocardium show no significant transcriptional differences.
Both myocardial layers possess comparable amounts of sarcomeric proteins, mitochondria, and vascular supply.
Similar structural features suggest equivalent stroke work per gram of tissue and high ejection fraction in the trabecular layer.

Conclusions:

The myocardium of the adult ventricular trabecular and compact layers is functionally and structurally highly similar.
This similarity provides a clear explanation for why excessive trabeculation is often asymptomatic.
Further research can refine our understanding of trabecular layer contributions to cardiac health and disease.