A systematic review and meta-analysis of the normal reference value of the longitudinal left atrial strain by three dimensional speckle tracking echocardiography

• Published in: Scientific reports 2022-03, Vol.12 (1), p.4395-4395, Article 4395
• Main Authors: Mohseni-Badalabadi, Reza, Mirjalili, Tayebeh, Jalali, Arash, Davarpasand, Tahereh, Hosseinsabet, Ali
• Format: Article
• Language: English
• Subjects: 692/308; 692/4019; Adult; Atrial Appendage; Blood pressure; Cardiovascular diseases; Echocardiography; Health risks; Heart Atria - diagnostic imaging; Heart rate; Heterogeneity; Humanities and Social Sciences; Humans; Meta-analysis; multidisciplinary; Reference Values; Regression analysis; Reproducibility of Results; Risk factors; Science; Science (multidisciplinary); Systole; Ventricular Function, Left - physiology
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-022-08379-7

The normal reference value of the global longitudinal left atrial strain during the reservoir phase (LASr) by 3D speckle-tracking echocardiography (3DSTE) is needed to define the abnormal and normal spectra and to compare and interpret the obtained values. The present study is a meta-analysis of 3DSTE-derived normal reference value of the longitudinal LASr and an attempt to determine probable contributing factors in the variations of reported ranges. The databases of PubMed, Scopus, and Embase were searched for the following keywordS: “Left atrial/left atrium” and “strain/speckle/deformation” and "three-dimensional/3-dimensional/three dimensional/3 dimensional/three dimension/3 dimension/three-dimension/3-dimension/3D/3-D". The studies selected included those on adult healthy subjects without cardiovascular risk factors. A random-effect model was used to calculate the global 3DSTE-derived longitudinal LASr, and meta-regression was applied to determine inter-study heterogeneity. Our search yielded 316 adult subjects from 5 studies. The mean value of the global 3DSTE-derived longitudinal LASr was 27.5% (95% CI, 25.2–29.8%). There was significant heterogeneity between the studies. The meta-regression analysis revealed the publication year, the heart rate, and systolic and diastolic blood pressure as the sources of heterogeneity. The current meta-analysis determined a normal reference value of the global 3DSTE-derived longitudinal LASr of 27.5% (95% CI, 25.2–29.8%). The heterogeneity between studies may be explained by the publication year, the heart rate, and systolic and diastolic blood pressure.