256层iCT评价正常升主动脉弹性与左心功能的相关性

目的 利用256层iCT探讨正常升主动脉弹性与左心功能的相关性.方法 收集行256层iCT冠状动脉CT血管成像(CTA)且冠状动脉正常,同时行超声检查无升主动脉粥样硬化的志愿者105例,分别按年龄分成3组、按性别分成2组,CT测量左室功能的诸参数:收缩末期容积(ESV)、舒张末期容积(EDV)、每搏输出量(SV)、射血分数(EF)、心输出量(CO)、心肌质量(MM);CT、超声2种方法测量冠状窦上方15 mm处升主动脉的最大及最小横断面积,计算主动脉弹性,评价升主动脉弹性与左心功能的相关性.结果 Bland-Altman图显示CT和超声测得升主动脉弹性值一致性良好(ICC=0.988,P<0.05);不同年龄组正常升主动脉弹性与EDV、ESV、SV、EF均有正相关关系,与MM有负相关关系,与CO没有相关性;与年龄呈负相关(r=-0.546,P<0.05).结论 正常升主动脉弹性与左心功能有一定的相关性,256层iCT能够准确测量升主动脉壁弹性并判断其与左心功能的关系,为临床评估心血管疾病的危险性提供了一定依据值.

256 slice iCT in assessment of correlation between normal ascending aortic elasticity and left ventricular function

Objective To investigate the correlation between normal ascending aortic elasticity and the left ventricular function by 256 slice iCT.Methods 105 subjects who underwent CTA and echocardiography inspection and diagnosed with normal coronary artery and without ascending aortic atherosclerosis were collected.Subjects were divided into three groups according to age and two groups according to gender respectively.Left ventricular function parameter values on CT were measured, including ESV,EDV,SV,EF,CO and MM.The aortic elasticity on CT and echocardiography was measured and calculated respectively on cross-sectional area at 15 mm above aortic valve.The relationship between ascending aortic elasticity and the left ventricular function was evaluated.Results Bland-Altman plot revealed that there was a good conformity between CT and echocardiography in measurement the value of ascending aortic elasticity(ICC=0.988,P<0.05).In different grougs of age,normal ascending aortic elasticity was positively correlated with EDV,ESV,SV,EF and negatively correlated with MM.There was no correlation with the CO.There was a negative relationship between aortic elasticity and age(r=-0.546,P<0.05)