改进的解剖M型超声对高血压左心室短轴局部心肌运动功能的评价

Evaluation of regional short-axis myocardial function of left ventricle in hypertension disease with improved anatomic M-mode echocardiography

目的应用改进的解剖M型(AMM)超声所测量和计算的参数(速度、加速度、相对力)评价高血压左心室短轴局部心肌运动功能。方法正常组30例,高血压组30例。采集两组左心室短轴乳头肌平面6个节段(前壁、前间隔、后间隔、后壁、侧壁、下壁)的解剖M型曲线,应用改进的解剖M型后处理工作站,分别测量3个时相(收缩期、舒张早期、舒张晚期)的峰值速度、加速度、相对力并进行比较。结果高血压组与正常组收缩期左心室短轴乳头肌平面6个节段的速度和加速度比较差异无统计学意义,舒张早期高血压组均低于正常组(P<0.05),舒张晚期两组速度无明显差异,而加速度高血压组均低于正常组(P<0.05);6个节段的相对力,在舒张早期前间隔、后间隔、下壁、后壁节段高血压组低于正常组,其他节段和时相差异无统计学意义。结论改进的解剖M型超声所测量和计算的参数能够反映高血压舒张功能的异常,并有其自身变化特点,这些新的技术参数为短轴方向心肌局部运动功能的全面定量评估提供一定的参考价值。

Objective To evaluate the movement function of the left ventricular short-axis by the parameters （velocity, acceleration and relatively force） that were measured and calculated by improved anatomical M-mode uhrasound. Method A total of 30 healthy subjects and 30 subjects with hypertension were included. The M-mode curves of short-axis sections at mitral valve level were recorded by vivid 7 and then the myocardial velocities, acceleration and force of the peak systolic phase, early-diastole and end-diastole were measured and calculated by the post processing station. Result At the papillary level, the myocardial velocities and acceleration of the systolic phase were no significant difference among the 6 segments between the two groups ; the myocardial velocities and acceleration of early-diastole of the hypertension group were significantly lower （ P 〈 0.05 ） among the 6 segments following the healthy group ; the end-diastolic myocardial velocities were not significantly different, but the end-diastofic acceleration of the hypertension group were significantly lower （ P 〈 0.05 ） among the 6 segments following the healthy group ; the early-diastolic force of the hypertension group were significantly lower （ P 〈 0.05 ） among the anteroseptal-posterior and anterior-inferior segments following normal group but no significant difference within the other segments. Conclusion The new parameters measured and calculated by anatomical M-mode ultrasound can reflect the movement functions of the patients with hypertension. This method is a new way to quantitatively assess the movement function in the region of left ventricular short-axis.