Validation of a Manual Method for Measuring Left Atrial Reservoir Strain Against Automated Speckle Tracking Analysis
Marina Leitman1,2, Vladimir Tyomkin1
1Department of Cardiology, Shamir Medical Center, Zerifin 70300, Israel.
A new manual method for calculating left atrial reservoir strain shows strong agreement with automated software. This technique offers a reliable alternative for assessing cardiac function, especially where automated tools are unavailable.
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Left atrial reservoir strain is a key indicator of cardiac function and cardiovascular risk.
- Automated analysis of left atrial strain is not widely accessible, particularly in resource-limited settings.
Purpose of the Study:
- To develop and validate a manual method for biplane left atrial reservoir strain calculation.
- To assess the agreement between manual and automated methods in patients with and without atrial fibrillation.
Main Methods:
- Echocardiography data from 60 patients (30 with atrial fibrillation, 30 in sinus rhythm) were analyzed.
- Left atrial reservoir strain was measured using both automated speckle tracking and a manual point-by-point method.
- Agreement was evaluated using Pearson correlation, Bland-Altman analysis, and intraclass correlation coefficient.
Main Results:
- Strong correlation (r=0.95 in AF, r=0.94 in SR) and excellent agreement were found between manual and automated methods.
- Bland-Altman analysis revealed narrow limits of agreement.
- High intraclass correlation coefficients (0.95 in AF, 0.92 in SR) indicated excellent reliability.
Conclusions:
- Manual measurement of left atrial reservoir strain is feasible and reproducible.
- The manual method demonstrates excellent agreement with automated software.
- This manual approach provides a reliable alternative for left atrial strain assessment when automated tools are unavailable.
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