定量组织速度显像与应变率显像技术评价COPD患者右心室功能的价值

目的应用定量组织速度显像(quantita tissue velocity imaging,QTVI)和应变率显像(strain rate imaging,SRI)检测COPD患者右心室功能。方法对89例COPD患者及32例健康对照组行常规超声心动图及组织多普勒成像检查,并计算右室Tei指数。结果 COPD患者肺动脉高压组(pul monary hypertension,PH)右心系统增大,右心室前壁增厚,主肺动脉内径增宽(P<0.01);PH组三尖瓣环右室游离壁处Vs、Ve、Vs/Ve均减低,Tei指数增高,随肺动脉压力增高更为显著;右室游离壁各节段峰值运动速度沿心室壁长轴方向递减,COPD患者右心室游离壁Vs、Ve、SRs、SRe均显著降低。结论 COPD患者右心室局部与整体功能已经受损,肺动脉高压患者右心室功能受损更重,组织速度显像和应变率显像能有效评价COPD患者右心室功能。

Evaluation of right ventricular function value in patients with chronic obstructive pulmonary disease by quantitative tissue velocity imaging and strain rate imaging

Objective To evaluate right ventricular function in patients with chronic obstructive pulmonary disease(COPD) by quantitative tissue velocity imaging(QTVI) and strain rate imaging(SRI).Methods 89 patients with COPD and 32 healthy people as control group underwent conventional echocardiography and tissue doppler imaging.Calculation was made on the Tei index of right ventricular.Results Right heart system of COPD patients with PH was larger,right ventricular wall was thicker,and internal diameter of the main pulmonary artery was wider(P<0.01);In the PH group,Vs,Ve,and Vs/Ve of right ventricular free wall of tricuspid annulus decreased,Tei index increased,and the differences became more apparent as pulmonary artery pressure increasing;The peak velocity of right ventricular free wall of every segment decreased along the long axis of ventricular wall.Vs,Ve,SRs and SRe of right ventricular free wall in COPD patients significantly decreased.Conclusion Part or whole function of right ventricle in patients with COPD has been damaged,but the damages are more significant in PH patients.The technique of QTVI and SRI could effectively evaluate the function of right ventricle in patients with COPD.