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Related Experiment Video

Updated: Jul 11, 2025

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

Published on: July 20, 2022

MR 4D flow-derived left atrial acceleration factor for differentiating advanced left ventricular diastolic

Clemens Reiter^1,2,3, Ursula Reiter⁴, Corina Kräuter³

¹Division of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.

European Radiology

|November 12, 2023

Summary

The left atrial (LA) acceleration factor α, derived from 4D flow imaging, accurately detects advanced left ventricular diastolic dysfunction. This single parameter simplifies diagnosis, identifying patients at higher cardiovascular risk.

Keywords:

Cardiovascular system Diagnostic imaging Heart function tests Magnetic resonance imaging Validation study

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Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

Published on: September 1, 2014

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Last Updated: Jul 11, 2025

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Published on: July 20, 2022

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Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism

Published on: September 1, 2014

Area of Science:

Cardiovascular Imaging
Medical Physics
Diagnostic Cardiology

Background:

Left ventricular (LV) diastolic dysfunction diagnosis is complex and multi-parametric.
Non-invasive estimation of left atrial (LA) pressure is crucial for assessing diastolic dysfunction.
The LA acceleration factor α derived from 4D flow imaging is a novel parameter for estimating LA pressure.

Purpose of the Study:

To investigate the association between the 4D flow-derived LA acceleration factor α and the severity of LV diastolic dysfunction.
To evaluate the diagnostic performance of α in differentiating grades of LV diastolic dysfunction using echocardiography as a reference.

Main Methods:

Prospective study of 94 subjects undergoing echocardiography and 3-T cardiac MR 4D flow imaging.
Calculation of LA acceleration factor α using peak outflow and inflow velocities from 4D flow data.
Receiver operating characteristic (ROC) curve analysis to determine the diagnostic accuracy of α for diastolic dysfunction.

Main Results:

Mean α values increased significantly with higher grades of LV diastolic dysfunction (p < 0.001).
α demonstrated high accuracy in detecting advanced diastolic dysfunction (AUC = 0.998), with 100% sensitivity and 99% specificity at α ≥ 1.58.
α accurately differentiated grade III diastolic dysfunction (AUC = 0.998) at α ≥ 2.14.

Conclusions:

The 4D flow-derived LA acceleration factor α effectively distinguishes advanced (grade II and III) LV diastolic dysfunction from non-advanced grades.
α serves as a single, continuous parameter that can simplify the diagnostic algorithm for advanced LV diastolic dysfunction.
This parameter holds potential for identifying patients at increased risk of cardiovascular events.