斑点追踪成像技术定量评价急性心肌梗死患者左室收缩同步性  

Assessment of Left Ventricular Dyssynchrony in Patients with Acute Myocardial Infraction by Speckle Tracking Imaging

作　　者：黄佳[1] 谢斌[2] 胡波[1] 邓倾[1] 周青[1] 郭瑞强[1] 

机构地区：[1]武汉大学人民医院超声影像科,武汉市430060 [2]黄冈市中心医院超声影像科

出　　处：《中国超声医学杂志》2012年第12期1082-1085,共4页Chinese Journal of Ultrasound in Medicine

摘　　要：目的探讨二维斑点追踪成像技术定量评价急性心肌梗死患者左室同步性临床价值。方法 46例急性心肌梗死患者和40例对照者接受二维超声检查,用斑点追踪成像软件分析测量收缩期纵向应变达峰时间(tssl)、收缩期径向和环向应变达峰时间(tssr,tssc)。计算左室各节段达峰时间标准差(tssl-SD,tssr-SD,tssc-SD)及节段达峰时间最大差值(tssl-dif,tssr-dif,tssc-dif),测量纵向应变延迟指数(LSDI),LSDI≥25%作为左室不同步标准。同时运用改良Simpson双平面法测量左室射血分数LVEF。结果急性心肌梗死组同步性参数较对照组增加(P<0.001或P<0.05);LSDI与LVEF呈负向线性相关(r=-0.786,P<0.001)。结论二维斑点追踪技术能准确评价左室不同步性,纵向应变延迟指数LSDI与LVEF呈线性负相关。Objective To explore the clinical values of speckle tracking imaging in assessment of systolic dyssyn- chrony in patients with acute myocardial infraction. Methods The study included 46 patients with acute myocardial in farction and 40 age-gender related volunteers. Two dimensional echocardiography was performed to collect and the time to minimal systolic longitudinal, radial, circumferential strain （tssl, tssr and tssc） were measured. The left ven tricular segmental standard deviation （tssl-SD, tssr SD, tssc SD） and maximal difference （tssl dif, tssr-dif, tssc dif） were calculated for. Longitudinal strain delay index （LSDI） was measured for the definition of LSDI≥25 % as left ven- tricular dyssynchrony. Results The dyssynchrony parameters in the acute myocardial infarction group were signifi- cantly increased （P〈0. 001 or P〈0.05）. Linear regression showed that I.SDI was negative correlated with LVEF （r=-0. 786, P〈0. 001）. Conclusions Left ventricular dyssynchrony was accurately evaluated by speckle tracking imaging. LSDI and LVEF are negatively correlated.

关 键 词：二维应变显像 急性心肌梗死 左室收缩同步性 

分 类 号：R445.1[医药卫生—影像医学与核医学] R542.22[医药卫生—诊断学]