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目的探讨组织多普勒成像技术(DTI)在评价尿毒症患者心脏舒张功能中的价值。方法对33例尿毒症患者采用脉冲波多普勒法测量二尖瓣口前向血流速度参数:舒张早期峰值速度(E)、舒张晚期峰值速度(A),计算E/A比值;利用组织多普勒成像(DTI)技术,测量左室侧壁、前壁、下壁、室间隔的二尖瓣环水平DTI参数:舒张早期峰值速度(Em);舒张晚期峰值速度(Am);计算Em/Am比值。对比分析两种检测方法。结果病例组E/A正常例数与异常例数间差异有统计学意义(P<0.05),Em/Am正常例数与异常例数间有显著的统计学差异(P<0.01)。结论 DTI技术可以实时定量地反映心肌运动的方向与速度,准确、客观地评价左心室舒张功能,有效避免频谱多普勒检查中存在的假性正常化现象。
Objective To investigate the value of tissue Doppler imaging (DTI) in assessing diastolic function in patients with uremia. Methods 33 patients with uremia were measured by pulse wave Doppler flow velocities before mitral valve parameters: peak early diastolic velocity (E), peak diastolic velocity (A), calculate the E / A ratio; the use of more tissue DTI parameters of left ventricular wall, anterior wall, inferior wall and ventricular septal mitral annulus were measured by Doppler imaging (DTI) technique. The early diastolic peak velocity (Em) and late diastolic peak velocity (Am) Am ratio. Comparative analysis of two detection methods. Results There was a significant difference between normal cases and abnormal cases (P <0.05). There was a significant difference between normal cases and abnormal cases (P <0.01). Conclusion The DTI technique can reflect the direction and speed of myocardial motion quantitatively in real time and accurately and objectively evaluate the left ventricular diastolic function and avoid the phenomenon of pseudo normalization in Doppler spectrum effectively.