Assessment for left atrial size by echocardiographic left atrial dimensional index
10.3760/cma.j.issn.1004-4477.2016.12.003
- VernacularTitle:超声心动图左心房径线指数评价左心房大小的临床研究
- Keywords:
Echocardiography;
Left atria;
Left atril dimensional index
- From:
Chinese Journal of Ultrasonography
2016;25(12):1026-1029
- CountryChina
- Language:Chinese
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Abstract:
Objective To investigate the diagnostic value of echocardiographic left atrial dimensional index( LADi) for evaluating left atrial size . Methods One 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/ m 2 . 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 . Results There 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 / m 2 . D ,LADi and D1 showed good inter-observer agreement ,intraclass correlation coefficient( ICC) was 0 .94 .Conclusions LADi may become a new method in evaluating left atrial size with its accuracy and efficiency .
