左室心尖与心底旋转变化规律的超声研究  

Regularity in Left Ventricular Apical Rotation and Basal Rotation on Ultrasound

作　　者：郭宝生[1] 任卫东[1] 陈昕[1] 晏华[2] 吉日[1] 赵含章[1] 程艳彬[1] 

机构地区：[1]中国医科大学附属第一医院心血管检查科,沈阳市110001 [2]沈阳市大众医院

出　　处：《中国超声医学杂志》2007年第7期481-483,共3页Chinese Journal of Ultrasound in Medicine

摘　　要：目的检测心尖旋转发生变化时心底旋转的变化规律。方法14只杂种犬作为研究对象,用加热的方法破坏心尖部心肌使心尖旋转幅度变小,用超声组织多普勒检测施加条件前、后心尖及心底旋转幅度的变化,并以收缩期旋转的峰值作为比较的参数。用配备了PhilipQLAB高级软件的个人电脑计算心尖及心底旋转幅度。结果心尖部心肌被破坏后心尖旋转幅度明显降低,由8.48°±4.02°降为3.14°±1.35°(P<0.001);左室扭转因心尖旋转的明显减低而减低(左室扭转=左室心尖旋转-左室心底旋转);心底旋转幅度也有一定程度的减低,由2.41°±0.68°减低为1.11°±0.90°(P<0.001)。结论心尖旋转幅度明显减低时,心底旋转幅度也减低。虽然心底旋转减低并未使左室扭转保持不变,但其部分代偿了左室扭转的降低,这显示了除收缩期左室被破坏心肌以外的其它部位心肌代偿收缩增强的同时左室扭转也有代偿的过程。左室扭转是左室收缩的组成部分,一定程度上反映左室的收缩情况。Objective To detect the regularity of left ventricular basal rotation during the changes of apical rotation. Methods Experiment was performed in 14 Mongrel dogs. Heating was used to destroy the apical myocardium in order to decrease the apical rotation. The apical and basal rotations before and after heating were detected and recorded. Peak values of apical and basal rotations during systolic period were regarded as the comparable parameters. Personal computer equipped with Philip QLAB Advanced Software was used to calculate the apical and base rotation values. Results After the apex had been heated, apical rotation was significantly decreased than that before heating, and values were 8.48±4.02 degrees vs 3.14±1.35 degrees, P〈0. 001, left ventricular torsion was reduced because of the significant reduction of apical rotation; basal rotation was also reduced, 2.41±0. 68 degrees vs 1.11±0.90 degrees P〈0. 001. Conclusions Basal rotation was also reduced along with apical rotating reduction. Although reduction of basal rotation could not keep the left ventricular torsion remained constant, it could partially compensate the left ventricular torsion reduction. It is shown that the strengthened contraction of the other parts except the destroyed myocardium and the left ventricular torsion were also compensated. Left ventricular torsion is a component of left ventricular contraction reflecting the contraction state of the left ventricle to some extent.

关 键 词：心尖旋转 心底旋转 左室扭转 组织多普勒 

分 类 号：R445.1[医药卫生—影像医学与核医学]