实时三维超声心动图评价急性心肌梗死患者左心室整体和局部心功能

目的 探讨实时三维超声心动图(RT-3DE)评价左室下壁、正后壁、侧壁急性心肌梗死患者整体和节段心功能的临床价值.方法 应用RT-3DE对23例下壁、正后壁、侧壁急性心肌梗死患者和41例正常人进行检查,软件分析得出左室整体和17节段的容积-时间曲线,比较正常组与心肌梗死组的整体和各节段舒张末期容积(EDV、rEDV)、收缩末期容积(ESV、rESV)、射血分数(EF、rEF)及节段-整体射血分数(rgEF)的差异.结果 与正常组比较,下壁、正后壁、侧壁急性心肌梗死组的整体心功能及梗死节段的心功能变化差异有统计学意义(P＜0.05),邻近梗死节段中部分节段的心功能变化差异有统计学意义(P＜0.05),远离梗死节段的大部分节段的心功能变化差异无统计学意义(P＞0.05).结论 RT-3DE可以定量评价急性心肌梗死患者整体和节段心功能.

Quantitative assessment of global and regional left ventricular function in patients with acute myocardial infarction by real-time three-dimensional echocardiography

Objective To probe into clinical value of real-time three-dimensional echocardiography (RT-3DE) in evaluating global and regional left ventricular function in patients with acute inferior, posterior and lateral myocardial infarction(MI).Methods The study consisted of 41 normal subjects and 23 patients with acute MI.RT-3DE was performed and three-dimensional image data was analyzed offline with software.A series of global and regional left ventricular volume curves were plotted.Regional and global diastolic volumes, regional and global systolic volumes, regional and global ejection fractions, regional stroke volume to global diastolic volume were compared respectively between control group and MI group.Results By contrast with control group, global left ventricle function and regional left ventricle function in the zones with infarction and part of the zones close to infarction had significant difference( P＜0.05),however,no effective statistic change was found in the most of the distal zones of infarction( P＞0.05).Conclusions RT-3DE can accurately evaluate measurement the left ventricular global and regional function in patients with acute MI.