PURPOSE: The aim of this study is to investigate the association between the cardiothoracic ratio (CTR), @entity299 ( @entity299 ), and left ventricular (LV) size and systolic function in @entity1 with or without preserved @entity1002 ( @entity1002 ). METHODS: A total of 181 subjects suspected with @entity453 underwent chest radiography (CR) and dual source computed tomography coronary angiography (DSCT-CA). @entity299 and CTR were derived from CR. The LV size and systolic function parameters, such as LV end-diastolic volume (LVEDV), LV end-systolic volume (LVESV) and @entity1002 were measured from DSCT-CA. The association between @entity299 , CTR and LV size and systolic function parameters were analyzed according to @entity1002 value (< 55%, depressed @entity1002 group; versus >=  55%, preserved @entity1002 group). RESULTS: Both @entity299 and CTR were higher in the depressed @entity1002 group compared with the preserved @entity1002 group. Significant correlations were found between @entity299 , CTR and LVEDV, LVESV, @entity1002 in depressed @entity1002 group. However, there was no significant association detected between CTR and LV size and systolic function parameters in preserved @entity1002 group. Both the LVEDV and LVESV showed a positive correlation with @entity299 in preserved @entity1002 group. CONCLUTION: Although CTR was not a reliable indicator of LV size and systolic function in @entity1 with preserved @entity1002 , it was correlated with LV size and @entity1002 in depressed @entity1002 @entity1 . Furthermore, @entity299 showed stronger correlations with LV size and systolic function even in @entity1 with preserved @entity1002 .

Which can predict left ventricular size and systolic function: Cardiothoracic ratio or XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity453 :: ('MESH:D003324', 'Disease') :: ['coronary artery disease'] @entity1002 :: ('MESH:D018487', 'Disease') :: ['LVEF', 'LV ejection fraction'] @entity299 :: ('MESH:D006331', 'Disease') :: ['TCD', 'transverse cardiac diameter']
@entity299 :: (MESH:D006331,Disease) :: ['transverse cardiac diameter']
