Normal left atrial strain and strain rate using cardiac magnetic resonance feature tracking in healthy volunteers

Vien T. Truong, Cassady Palmer, Sarah Wolking, Brandy Sheets, Michael Young, Tam N.M. Ngo, Michael Taylor, Sherif Nagueh, Karolina M. Zareba, Subha Raman, Wojciech Mazur

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

AIMS: The aim of our study was to establish normal ranges for left atrial (LA) strain and strain rate using cardiac magnetic resonance feature tracking (CMR-FT), LA sphericity index, and to compare LA strain using CMR-FT with 2D-speckle tracking echocardiography (STE) in a healthy population. METHODS AND RESULTS: A total of 112 volunteers (45 male, 67 female) had adequate tracking for analysis on CMR-FT (Circle Cardiovascular Imaging, Calgary, Canada). The median age was 42 years (range 19-79 years, interquartile range 30-53 years). LA reservoir, conduit, booster strain, strain rate using CMR-FT, and sphericity index were evaluated. Of the 112 volunteers, 91 patients had adequate tracking on 2D-STE using three commonly applied zero-baseline time reference methods: R-R gating, P-P gating, and volume gating (defining end-systole at the LA maximum and end-diastole at the LA minimum). The LA strain, strain rate using CMR-FT, and sphericity index were reported and comparable between both genders (P > 0.05 for all). The LA booster function including strain and strain rate increased significantly with age (P < 0.001 for all), while the LA conduit function gradually decreased. In comparison with STE, the LA reservoir strain was comparable between CMR and volume-gating methods (38.48 ± 9.31 vs. 36.77 ± 6.46; P = 0.13) but not with R-R and P-P gating methods (P < 0.001 for all). LA strain, strain rate, and sphericity index using CMR-FT had good intraobserver and interobserver reproducibility. CONCLUSION: LA strain, strain rate using CMR-FT, and sphericity index can be quickly assessed with good intraobserver and interobserver reproducibility.

Original languageEnglish (US)
Pages (from-to)446-453
Number of pages8
JournalEuropean Heart Journal Cardiovascular Imaging
Volume21
Issue number4
DOIs
StatePublished - Apr 1 2020

Keywords

  • 2D-STE
  • CMR-FT
  • LA booster strain
  • LA conduit strain
  • LA reservoir strain

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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