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目的探讨组织同步成像(TSI)对儿童扩张型心肌病(DCM)左室功能诊断价值。方法2006年11月至2007年8月期间连续入重庆医科大学附属儿童医院心内科的DCM患儿16例,另选取健康儿童20例,用GEVivid7的TSI三平面成像测定左室基底段、中间段心肌收缩达峰时间(Ts),分析各组左室12节段Ts的标准差(Ts-SD)、Ts的最大值与最小值之差(Ts-12)及TSI图特点。结果(1)对照组儿童左室TSI图主要显示为绿色,仅少数节段为黄色,DCM组较多节段呈橙色甚至红色;(2)DCM组左室各节段Ts较对照组显著延长(P<0.05),该组Ts-SD为(64.23±34.48)ms、Ts-12为(176.56±77.90)ms,也较对照组显著延长(P<0.05)。结论儿童DCM普遍存在左室的非同步收缩,利用TSI技术可对其进行准确评价。
Objective To investigate the value of tissue synchronous imaging (TSI) in the diagnosis of left ventricular function in children with dilated cardiomyopathy (DCM). Methods From November 2006 to August 2007, 16 children with DCM admitted to Department of Cardiology, Children’s Hospital Affiliated to Chongqing Medical University were enrolled. Twenty-three healthy children were selected as healthy volunteers. The basal and middle basal segments of left ventricle The peak systolic time (Ts) was measured. The standard deviation (Ts-SD), Ts-12 (Ts-12) and TSI features of Ts were calculated. Results (1) The left ventricular TSI of the control group showed mainly green, only a few segments were yellow, more segments of DCM were orange or even red. (2) The Ts of left ventricular in DCM group was significantly longer than that in control group (P <0.05). The Ts-SD was (64.23 ± 34.48) ms and Ts-12 was (176.56 ± 77.90) ms, which was significantly longer than the control group (P <0.05). Conclusion There is a general prevalence of left ventricular systolic contraction in children with DCM, which can be accurately evaluated by TSI technique.