Clinical Research
Assessment for left atrial size by echocardiographic left atrial dimensional index
Linlin Chen, Qizhe Cai, Yanping Shi, Yidan Li, Hong Li, Yidan Wang, Xiuzhang Lyu
Published 2016-12-25
Cite as Chin J Ultrasonogr, 2016, 25(12): 1026-1029. DOI: 10.3760/cma.j.issn.1004-4477.2016.12.003
Abstract
ObjectiveTo investigate the diagnostic value of echocardiographic left atrial dimensional index(LADi) for evaluating left atrial size.
MethodsOne hundred and eleven subjects were divided into left atrial enlarged group(n=53) and left atrial normal group(n=58) by the left atrial volume index(LAVi) with cutoff value of 34 ml/m2. Left atrial antero-posterior diameter (D1),medial-later diameter (D2),superior-inferior diameter (D3) were measured,and the average value (D) was calculated. Left atrial dimensional index(LADi) were calculated as D divided by body surface area (BSA). Left atrial volume was measured using the biplane Simpson method,and LAVi was calculated. Based on LAVi as reference standards,inter-observer variability and diagnostic value of these parameters were analyzed.
ResultsThere were differences in the measured parameters between the two groups. In the left atrial enlarged group and normal group,LADi had good correlation with LAVi (left atrial enlargement group: r=0.87; normal control group: r=0.80). LADi had the best diagnostic accuracy,area under curve(AUC) was 0.95,and the cutoff value of LADi to diagnosing left atrial enlarged was 26.4 mm/m2. D,LADi and D1 showed good inter-observer agreement,intraclass correlation coefficient(ICC) was 0.94.
ConclusionsLADi may become a new method in evaluating left atrial size with its accuracy and efficiency.
Key words:
Echocardiography; Left atria; Left atril dimensional index
Contributor Information
Linlin Chen
Department of Echocardiography, Beijing Chao Yang Hospital, Capital Medical University, Beijing 100020, China
Qizhe Cai
Yanping Shi
Yidan Li
Hong Li
Yidan Wang
Xiuzhang Lyu