We read with great interest the article by Zhong et al entitled ‘Effects of age and gender on left atrial ejection force and volume from real-time three-dimensional echocardiography’. The authors determined the normal reference values for left atrial (LA) volumes and LA ejection force (LAEF) assessed by real-time three-dimensional echocardiography (RT3DE). The study was interesting, but we have a few additional comments on the evaluation of LA volumes and LAEF.
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