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Left atrial (LA) size and function have been demonstrated to be important imaging biomarkers with powerful potential in predicting clinical outcome in several disorders. The angle-independent three-dimensional (3D) speckle-tracking echocardiography (3DSTE) has a capability for quantitative assessment of LA volumes and strains in 3D space at the same time from the same 3D acquired datasets. Therefore, the objective of the present study was to define normal values of 3DSTE-derived LA strains in healthy subjects. It was also examined whether there is any age- and gender-dependency of these parameters. The present study comprised 309 healthy volunteers, from which 87 were excluded due to inadequate image quality. The remaining group consisted of 222 subjects (mean age: 36.3 ± 13.7 years, 112 males). Complete two-dimensional echocardiography and 3DSTE have been performed in all cases. Peak circumferential strain (CS) increased with age with a decline &gt; 50 years in females, in males CS remained almost unchanged. While peak longitudinal strain (LS) increased with age with unchanged parameters &gt; 50 years, parallel increase in peak area strain (AS) with age could be demonstrated in both genders with a decline in females &gt; 50 years. While CS and AS at atrial contraction increased with age in females, parallel decrease could be demonstrated in males. LS at atrial contraction increased with age especially in females. Normal values of 3DSTE-derived LA peak strains and strains at atrial contraction are demonstrated together with their age- and gender-dependency.

the international journal of cardiovascular imaging

Normal reference values of three-dimensional speckle-tracking echocardiography-derived left atrial strain parameters (results from the MAGYAR-Healthy Study)