Left ventricular regional function in healthy young and middle-aged Chinese evaluated by 256-slice computed tomography

doi:10.3969/j.issn.1002-7386.2015.03.001

Abstract：Objective To establish the normal range of left ventricular ( LV) regional function parameters in healthy young and middle-aged Chinese by using 256-slice CT, and to explore the change rule of normal value of left ventricular regional function parameters in 16 segments.Methods One hundred and twenty-eight healthy young and middle-aged Chinese underwent 256-slice CT angiography and cardiac functional analysis .The dedicated software of the Extended Brilliance Workspace ( Philips Medical Systems ) was used to calculate the end-systole wall thickness ( ESWT ) , end-diastole wall thickness(EDWT),wall motion(WM) and wall thickening percent according to 16 segments measurement method .Finally the results were statistically analyzed.Results (1)The normal range of left ventricular (LV) regional function parameters in healthy young and middle-aged people was obtained by 256-slice CT.(2)Based on the anatomy of left ventricular wall ,the 16 segments were divided into two parts:the left ventricular free wall and the interventricular septum .EDWT and WM were increased gradually from apex to base;EDWT,ESWT,WM were the largest in papillary muscle ,the next in apex of heart ,the smallest in basilar part , however , WT was gradually decreased from apex of heart to basilar part .These values in free left ventricularwall were greater than those in interventricular septum .( 3 ) The distribution characteristics in circumferential direction:according to the order of anterior ,antero-septal,infero-septal,inferior,posterior,ventri segment,the EDWT,ESWT, WT percent, and WM showed the distribution of “V” shape on the scattergram approximately .( 4 ) The distribution characteristics in longitudinal directions:from apex of heart to basilar part ,the EDWT,ESWT,WT percent and WM showed the distribution of inverted “V” shape on the scattergram approximately .Conclusoin The normal range of LV regional function parameters in healthy young and middle-aged Chinese is established by 256-slice CT, and there is certain rule in the parameters of 16 segments .