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目的探讨速度向量成像技术评价高血压患者左心室舒张功能的可行性。方法选取2013年1月-12月原发性高血压患者65例和健康对照41例,应用脉冲多普勒测量二尖瓣口舒张早期血流频谱(E峰)、二尖瓣口舒张晚期血流频谱(A峰),应用速度向量成像技术测量二尖瓣环侧壁舒张早期运动速度(Ve)、二尖瓣环侧壁舒张晚期运动速度(Va),并计算E/A、Ve/Va以及E/Ve,对两组之间的参数进行比较。结果高血压组与对照组A分别为79.54±13.43、56.47±10.46,Va分别为6.93±1.46、4.73±0.92,E/Ve分别为12.32±3.72、10.61±2.41,高血压组均大于对照组,差异有统计学意义(P<0.01);高血压组与对照组E分别为57.45±13.07、81.39±12.28,E/A分别为0.72±0.10、1.46±0.17,Ve分别为5.90±1.50、9.11±1.03,Ve/Va分别为0.89±0.30、2.00±0.43,高血压组均小于对照组,差异有统计学意义(P<0.001)。结论速度向量成像技术可识别左心室舒张功能异常,有望成为评价左心室舒张功能的新方法;同时,E/Ve也有可能成为一个新的评价左心室舒张功能的指标。
Objective To investigate the feasibility of velocity vector imaging in evaluating left ventricular diastolic function in hypertensive patients. Methods From January 2013 to December 2013, 65 patients with essential hypertension and 41 healthy controls were enrolled in this study. Pulmonary Doppler echocardiography (E-MAP), mitral end diastolic blood flow (A), the early diastolic velocity (Ve) and the late diastolic velocity (Va) of the mitral annular wall were measured by velocity vector imaging and E / A, Ve / Va And E / Ve, to compare the parameters between the two groups. Results A and B were 79.54 ± 13.43 and 56.47 ± 10.46 respectively in the hypertensive group and control group, with Va values of 6.93 ± 1.46 and 4.73 ± 0.92, E / Ve values of 12.32 ± 3.72 and 10.61 ± 2.41, respectively, The difference was statistically significant (P <0.01); hypertension group and control group E were 57.45 ± 13.07,81.39 ± 12.28, E / A were 0.72 ± 0.10,1.46 ± 0.17, Ve were 5.90 ± 1.50,9.11 ± 1.03, Ve / Va were 0.89 ± 0.30 and 2.00 ± 0.43, respectively. The levels of hypertension were significantly lower than those of the control group (P <0.001). Conclusion Velocity vector imaging can identify left ventricular diastolic dysfunction and is expected to become a new method to evaluate left ventricular diastolic function. Meanwhile, E / Ve may become a new index to evaluate left ventricular diastolic function.