MRI检测活性心肌初步研究与冠状动脉造影、M型超声对比

目的分析磁共振多技术扫描检测心肌活性的价值。方法应用磁共振多技术扫描对34例临床资料完整的冠心病患者进行检查,并将结果与冠状动脉造影和M型超声结果对照。结果磁共振测得射血分数、每搏射血量和心输出量明显低于超声测值且有统计学意义(P<0.05),磁共振测得舒张末期容积和收缩末期容积比超声测值稍高但无统计学意义(P>0.05)。以冠状动脉造影结果为参考标准,静息心肌灌注扫描检测冠状动脉狭窄50%以上的敏感性为70.4%,特异性为94.2%,总符合率为78.7%。结论磁共振多技术检测活性心肌优于M型超声,与冠状动脉造影有较高符合率。

Primary Study on Detecting the Myocardial Viability by MR Imaiging: Compared with Coronary Angiography and Echocardiography

Objective To evaluate the detecting value of myocardial viability by multimodality MR Imaging.Methods 34 patients who had coronary artery disease with complete clinical data underwent multimodality MR imaging,the results of MR scanning were compared with that of coronary angiography and echocardiography.Results Ejection fraction,stroke volume,cardiac output measured by cine MRI significantly lower than which measured by echocardiography(P<0.05),end-diastolic volume and end-systole volume measured by cine MRI higher than which measured by echocardiography,but had no significant statistic difference(P>0.05).Using result of coronary angiography as reference standard,the sensitivity,specificity and total coincidence in detecting coronary artery stenosis(>50% luminal narrowing) by rest first-pass MR imaging was 70.4%,94.2% and 78.7%,respectively.Conclusion Multimodality MR imaging in detecting the myocardial viability is superior to echocardiography,and has high coincidence with coronary angiography.