组织多普勒成像技术评价老年高血压患者右心室功能的临床研究

目的探讨组织多普勒成像(TDI)技术评价老年高血压患者右心室功能的临床价值。方法选择老年高血压患者34例(高血压组)和健康老年人44例(对照组)。经胸超声心动图检查,应用TDI技术于心尖四腔观获取右心室侧壁三尖瓣环处心肌运动频谱图,测量舒张早期峰值速度(Em)、舒张晚期峰值速度(Am),并计算Em和Am比值。同时测量收缩期峰值速度(Sm)、等容收缩期心肌加速度。结果高血压组Em(5.91±1.56)cm/s、Am(12.79±2.63)cm/s、Sm(10.82±1.45)cm/s均明显低于对照组Em(7.57±2.11)cm/s、Am(14.27±2.03)cm/s、Sm(12.68±2.33)cm/s,差异有统计学意义(P=0.000,P=0.006,P=0.000);Em/Am高血压组(0.47±0.12)明显低于对照组(0.54±0.15),差异有统计学意义(P=0.048)。结论 TDI可以准确、直观地评价老年高血压患者右心室功能。

Tissue Doppler imaging evaluation of function of right ventricle in elderly patients with hypertension

Objective To investigate the tissue Doppler imaging(TDI) in evaluating the function of right ventricle in elderly patients with hypertension.Methods Thirty-four elderly patients with hypertension and 44 healthy individuals as control group were enrolled in the study.The frequency spectrogram of tricuspid annular motion was obtained by pulse-wave Doppler tissue imaging. The peak systolic velocity(Sm),the peak velocity at early diastole(Em) and at late diastole(Am) were measured.The ratio of Em/Am was calculated and the myocardial acceleration during isovolumic contraction was measured.Results The Em(5.91±1.56) cm/s,Am(12.79±2.63) cm/s and Sm(10.82±1.45) cm/s in hypertension group were significantly lower than those in the control groupEm(7.57±2.11) cm/s,Am(14.27±2.03) cm/s and Sm(12.68±2.33) cm/s](P = 0.000,P =0.006,P =0.000).The ratio of Em/Am(0.47±0.12)in hypertension patients was significantly lower than that(0.54±0.15) in the control group(P =0.048).Conclusions TDI can accurately and directly assess the function of right ventricle in elderly patients with hypertension.