目的  探讨使用频谱超声心动图评价扩张型心肌病右心室整体收缩功能的临床意义。方法  选取40例扩张型心肌病患者作为观察组，将观察组患者根据右室内径是否扩大分为扩大组18例和无扩大组22例；选取同时段40例体检显示健康者为对照组。两组研究对象均经频谱超声心动图检测右心室整体收缩功能的参数，包括右心室射血分数(RVEF)、肺动脉收缩压（SPAP）、右心室压力最大上升速率（dP/dtmax）、E/A以及Tei指数，比较并分析观察组治疗前后和对照组的各项参数。结果观察组SPAP、dP/dtmax与Tei指数值均较正常对照组显著增大，其中扩大组大于无扩大组；观察组RVEF与E/A值较对照组显著降低，其中扩大组小于无扩大组，以上各项比较差异均有统计学意义（P均＜0.05）；治疗后的扩张型心肌病患者dP/dtmax与Tei指数值较治疗前显著减小，RVEF与E/A值较治疗前显著增大（P均＜0.01）；治疗前后SPAP无显著改善（P＞0.05）。结论  采用频谱超声心动图评价扩张型心肌病患者的右心室整体收缩功能操作简便、安全可靠，能够提供可靠的诊断依据。 

ObjectiveTo investigate clinical significance of spectral echocardiography in evaluating global right ventricular systolic function in patients with dilated cardiomyopathy (DCM). MethodsForty patients with DCM were selected as the observation group, and they were divided into the dilation group (18 cases) and the nondilation group (22 cases) according to whether the right ventricular internal diameter was dilated or not. Forty healthy people who underwent physical examination in the same period were selected as the control group.  Parameters of global right ventricular systolic function , including right ventricular ejection fraction (RVEF), systolic pulmonary artery pressure（SPAP）, the maximum rate of right ventricular pressure rise (dP/dtmax), E/A and Tei index in both groups were detected by spectral echocardiography. The parameters of observation group before and after treatmen were compared with the control group. ResultsThe detection results showed that the SPAP, dP/dtmax and Tei index of patients with DCM in the observation group were significantly larger than those of the control group, and those of the dilation group were larger than the nondilation group. The RVEF and E/A of observation group were significantly lower than those of the control group, and those of the dilation group were smaller than the nondilation group (all P<0.05). The dP/dtmax and Tei index of patients with DCM were significantly decreased while RVEF and E/A were significantly increased after treatment (P<0.05). There was no significant improvement of SPAP after treatment (P>0.05). ConclusionSpectral echocardiography is simple to operate, safe and reliable in evaluating global right ventricular systolic function in patients with DCM. It can provide reliable bases for diagnosis.