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Related Concept Videos

Cardiac Catheterization II: Right Heart Catheterization01:21

Cardiac Catheterization II: Right Heart Catheterization

Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...
Cardiac Catheterization III: Left Heart Catheterization01:24

Cardiac Catheterization III: Left Heart Catheterization

Left heart catheterization is an invasive diagnostic procedure used to evaluate the function and structure of the left side of the heart. It is generally performed to diagnose and treat cardiovascular conditions such as valve abnormalities, coronary artery disease, and congenital heart defects.Diagnostic and therapeutic purposesLeft heart catheterization serves various diagnostic and therapeutic purposes, including:Assessing coronary artery bypass grafts.Evaluating coronary artery disease in...

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A Left Atrial Positioning System to Enable Follow-up and Cohort Studies.

Noah J Mehringer, Elliot R McVeigh

    IEEE Transactions on Bio-Medical Engineering
    |May 27, 2025
    PubMed
    Summary

    A new Left Atrial Positioning System (LAPS) algorithm automatically converts 3D left atrium meshes into a standard 2D space. This system offers accurate and flexible visualization for mapping data in the left atrium.

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    Area of Science:

    • Medical imaging analysis
    • Computational anatomy

    Background:

    • Accurate spatial representation of the left atrium (LA) is crucial for understanding cardiac function and disease.
    • Current methods for analyzing LA surface data can be complex and lack standardization.

    Purpose of the Study:

    • To introduce a novel algorithm, the Left Atrial Positioning System (LAPS), for automatic conversion of 3D left atrium surface meshes into a standard 2D space.
    • To establish a standardized framework for regional LA surface data analysis.

    Main Methods:

    • Utilized 45 contrast-enhanced 4D CT datasets from 30 subjects.
    • Segmented left atrium volume using a neural network and created surface meshes.
    • Calculated LAPS coordinates (longitude/latitude) on meshes relative to the posterior wall and mitral valve.
    • Evaluated accuracy by transferring coordinates to a synthetic ground truth and measuring Euclidean distance error.

    Main Results:

    • Achieved a median point transfer error of 2.13 mm between follow-up scans and 3.99 mm between different subjects.
    • Successfully divided the left atrium into 24 anatomic regions.
    • Represented these regions on a 2D square diagram for visualization.

    Conclusions:

    • The LAPS algorithm is fully automatic, accurate, and robust to anatomical variations.
    • Provides flexible visualization for mapping data within the left atrium.
    • Enables a framework for comparing regional LA surface data in follow-up and cohort studies.