What is it about?
LA strains are becoming more and more important to assess LA function quantitatively.
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Why is it important?
Normal reference ranges for LA strain were reported from initial few studies with modest sample sizes (n = 100–350) . Via systematic review and meta-analysis, The normal ranges were determined from 40 studies (n=2,542 healthy subjects) . Reservoir strain: 39% [95% CI, 38%–41%] Conduit strain: 23% [21%–25%] Contractile strain (LA Kick function): 17% [16%–19%].
Perspectives
Roughly, normal range for Reservoir strain is >38%, Conduit strain>21% and Contractile strain >16%. Reservoir strain = conduit strain + contractile strain
Dr Kazuaki Negishi
University of Tasmania
Read the Original
This page is a summary of: Normal Ranges of Left Atrial Strain by Speckle-Tracking Echocardiography: A Systematic Review and Meta-Analysis, Journal of the American Society of Echocardiography, January 2017, Elsevier,
DOI: 10.1016/j.echo.2016.09.007.
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