速度向量成像评价心尖肥厚型心肌病患者左室扭转  

Evaluation of Left Ventricular Systolic Torsion in Patients with Apical Hypertrophic Cardiomyopathy Using Velocity Vector Imaging

作　　者：由春媛[1] 杨承健[1] 叶新和[1] 冯雪虹[1] 徐欣[1] 王建瑾[1] 杨大庆[1] 

机构地区：[1]南京医科大学附属无锡第二医院心内科,江苏省无锡市214002

出　　处：《中国超声医学杂志》2011年第6期529-532,共4页Chinese Journal of Ultrasound in Medicine

摘　　要：目的应用速度向量成像(VVI)技术评价心尖肥厚型心肌病(ApHCM)患者左室短轴心肌扭转运动。方法使用彩色多普勒超声心动图采集17例ApHCM患者和17例正常对照者左室心尖和基底短轴切面二维动态图像,VVI软件脱机分析数据,测定各心肌节段收缩期峰值旋转角度、旋转速率,并计算左室扭转角度。结果 (1)ApHCM组左室短轴心尖部心肌收缩期峰值旋转角度、旋转速率明显低于正常组(分别为6.48°±3.85°比10.56°±3.26°,P<0.05和86.55°/s±14.43°/s比106.77°/s±lO.13°/s,P<0.05),而两组间心底部心肌收缩期峰值旋转角度、旋转速率差异无统计学意义。(2)ApHCM组左室扭转角度明显低于正常组(12.41°±4.90°比16.69°±3.73°,P<0.05)。结论 VVI技术可无创评价ApHCM患者左室旋转及扭转运动特征,ApHCM患者左室心尖部旋转角度的减小可能引起左室整体扭转功能的减低。Objective To evaluate left ventricular（LV） systolic torsion in patients with apical hypertrophic car diomyopathy （ApHCM） the velocity vector imaging（VVI） was used. Methods We acquired apical and basal LV shortaxis 2-dimension loops with color doppler echocardiography in 17 ApHCM patients and 17 normal persons. The peak systolic rotation and rotation rate were measured in the LV basal and apical plane and the peak systolic torsion was cal- culated using VVI software. Results Compared with the normal controls, apical rotation and rotation rate were markedly decreased in ApHCM patients（6.48°±3.85°vs 10.56°±3.26°,P〈0.05; 86; 55°/s±14.43°/s vs 106.77°/ s± 10.13°/s,P〈0.05）, but the decreases in basal rotation and rotation rate were not significant. As a consequence, LV torsion was significantly lower in ApHCM patients （12.41°±4.90° vs 16.69°± 3.73°,P〈0.05）. Conclusions VVI can De used to noninvasively assess the characteristic of LV torsion in ApHCM patients. LV torsion in ApHCM was significantly decreased due to a reduction in apical rotation.

关 键 词：速度向量成像 肥厚型心肌病 扭转 

分 类 号：R540.42[医药卫生—心血管疾病] R542.2[医药卫生—内科学]