DTI检测左心室收缩速度与扩张型心肌病患者运动耐量的关系  

Relationship Between Cardiopulmonary Exercise Capacity in Dilated Cardiomyopathy and Left Ventricular Systolic Velocities Assessed by DTI

作　　者：郭建英[1] 朱永胜[1] 张军[1] 刘丽文[1] 王军学[1] 童卫[1] 

机构地区：[1]第四军医大学,西安710032

出　　处：《医疗卫生装备》2008年第7期97-98,共2页Chinese Medical Equipment Journal

摘　　要：目的:分析组织多普勒检测左心室长轴方向收缩速度与扩张型心肌病患者运动耐量的相关性。方法:68例DCM患者根据运动试验测定的最大耗氧量(VO2max)是否大于14ml/(kg·min)分为2组,分别用组织多普勒显像方式于心尖四腔切面检测左心室侧壁(L)和室间隔(S)的瓣环处、中部和二者中点的射血前期(is)和射血期速度(ez),结果与VO2max进行相关性分析。结果:DTI检测左心室等容收缩期和射血期峰值速度VO2max<14ml/(kg·min)组(32例)均低于VO2max≥14ml/(kg·min)组(36例),其中S1ez、L1ez、L1is、L2is、L3is存在显著差异(P<0.05)。结论:DTI检测左心室收缩速度与扩张型心肌病的运动耐量有较好的相关性。Objective To analyse the relationship between the left ventricular longitudinal systolic velocities quantified by DTI and the cardiopulmonary performance in patients with dilated cardiomyopathy（DCM）. Methods Maximal oxygen consumption （VO2max） and systolic velocities were assessed in 68 patients with DCM during their regular follow-up. Peak velocities during isovolumic contraction （is） and ejection （ez） were assessed at the site of anal, at the middle of the wall, and at the middle site between the two sites of interventricular septum （S）, lateral wall （L） of LV in apical 4 chambers view. Results Peak velocities during IVC and ejection in group of patients （32cases） with VO2max〈14 ml/（kg .min） were lower than those （36 cases） with VO2max〉 14 ml/（kg.min）, especially significantly for S1ez,L1ez,L1is,L2is, and L3is （P〈0.05）. Conclusion Regional LV longitudinal velocities interrogated by DTI show a close correlation to exercise capacity in DCM.

关 键 词：扩张型心肌病 最大耗氧量 组织多普勒显像 

分 类 号：R542.2[医药卫生—心血管疾病]