摘要
目的 研究心肌组织背向散射积分 (IBS)及IBS心动周期变化幅度 (CVIB)用于临床早期诊断急性心肌梗死的价值。方法 选 30例正常人、15例急性心肌梗死患者 (心肌梗死在 2 4h以内 )、15例陈旧性心肌梗死患者 (心肌梗死在 3个月以上 ) ,应用HP 5 5 0 0型超声诊断仪 ,在胸骨旁左室乳头肌短轴切面 ,分别测量左心室前间隔、前壁、侧壁 ,后壁、下壁和后间隔心肌组织的IBS ,并将其与心包IBS的比值作为心肌IBS的校正值(IBS %) ;舒张末期与收缩末期的IBS差值即CVIB ,并将其与心包IBS的比值作为心肌CVIB的校正值(CVIB %)。同时作心电图的比较对照。结果 15例急性心肌梗死患者心肌梗死部位的IBS值明显大于非梗死部位及正常人 ( 2 1.4vs 8.1,2 1.4vs 8.2 ,均P <0 .0 0 1) ,而CVIB明显小于非梗死部位及正常人 ( 6 .5vs 10 .1,6 .5vs 7.5 ,均P <0 .0 0 1)。与心电图变化一致。陈旧性心肌梗死部位的IBS明显高于急性心肌梗死部位 ( 2 5 .6vs 2 1.4,P <0 .0 5 ) ,CVIB则明显低于急性心肌梗死部位 ( 3.9vs 6 .5 ,P <0 .0 5 )。结论 IBS对临床上诊断急性心肌梗死有很高的特异性和敏感性 ,并可判断病变心肌的范围和功能状况 ,可作为早期诊断急性心肌梗死的可靠指标。
Objective To evaluate the early diagnosis of acute myocardial infarction (AMI) by the ultrasonic integrated backscatter (IBS).Methods Thirty healthy persons,15 cases with acute myocardial infarction (in 24 hours),15 cases with old myocardial infarction (more than 3 months ) were examined by IBS and the cyclic variation of integrated backscatter (CVIB) with HP 5500 ultrasonic system in different areas (the area of myocardial infarction and no myocardial infarction).Results In the area of AMI the IBS was much higher than that of normal in same patient ( 21.4 vs 8.1,P< 0.001),but the CVIB was lower ( 6.5 vs 10.1,P< 0.001).In the area of OMI the IBS was higher than the area of AMI but the CVIB was lower ( 25.6 vs 21.4, 3.9 vs 6.5,P< 0.05).Conclusions Ultrasonic tissue characterization with integrated backscatter can be used for early diagnosis of AMI,and can judge the area of AMI and function in the range of AMI.
出处
《中华超声影像学杂志》
CSCD
2001年第12期725-727,共3页
Chinese Journal of Ultrasonography
关键词
超声心动描记术
背向散射积分
心肌梗塞
诊断
Echocardiography
Integrated backscatter
Myocardial infarction/diagnosis
