应变率成像对急性前壁心肌梗死患者右室功能的评价

目的探讨应变率成像(SRI)定量评价急性前壁心肌梗死(AMI)患者右室局部心肌功能的临床价值。方法 AMI组20例,健康者30例为对照组,SRI测量其后间隔及右室侧壁不同水平的纵向收缩期、舒张早期及心房收缩期的峰值应变率(SRS、SRE、SRA),并以冠状动脉造影结果为参照进行对比分析。结果 AMI组后间隔基底段、中段、心尖段及右室侧壁基底段的SRS较对照组减低(P<0.05);AMI组后间隔基底段、中段、心尖段及右室侧壁基底段、中段的SRE较对照组减低(P<0.05);AMI组后间隔中段、心尖段的SRA较对照组减低(P<0.05)。结论 SRI技术是临床无创、定量评价AMI患者右室局部心肌功能的有效方法。

Evaluation of right ventricular function in patients with acute left ventricular anterior myocardial infarction by strain rate imaging

Objective To evaluate the clinical value of strain rate imaging （SRI） in quantitative assessment of right ventricular（RV） regional myocardial function. Methods Twenty patients with acute myocardial infarction （AMI） and thirty control subjects were enrolled in the study. Longitudinal peak strain rate of posterior interventricular septum （PS） and RV walls during systole, early diastole and atrium contraction （ SRS, SRE and SRA） were measured at different levels （basal middle and apical）. SRI data were compared with coronary angiography results. Results SRS in all levels of PS （ basal, middle and apical） and base RV wall was significantly decreased in AMI group （P 〈 0.05 ）, SRE in all levels of PS and base and middle level of RV in AMI group was significantly lower than that of control group （ P 〈 0. 05 ） , SRA in middle and apex level of PS in AMI group was significantly decreased compared with control group （ P 〈 0.05 ）. Conclusion SRI is sensitive and feasible in evaluating RV function of acute LV anterior wall myocardial infarction.