实时三维超声心动图在评估心梗患者左心功能的应用价值

Evaluation of left cardiac function in mycoardial infarction using real time three-dimensional echocardiography

目的:本研究以磁共振成像(MRI)检查结果为标准,应用实时三维超声心动图(real time 3-dimensional echo-cardiography,RT-3DE),定量评价左心室收缩功能,并比较同组病例的二维超声心动(two-dimensionalechocardiography,2D)的心功能指标,探讨实时三维超声心动图在心梗患者心功能评价中的应用价值。方法:临床诊断心梗患者33例,均行心脏MRI、二维超声心动图、实时三维超声心动图。结果:RT-3DE和MRI两种方法的心功能指标差异无统计学意义,收缩末期容积(ESV)、舒张末期容积(EDV)、每搏输出量(SV)、左室射血分数(EF)相关性高(r=0.81～0.87);2D和MRI两种方法测量的心功能指标差异没有统计学意义,EDV、SV相关性较高(r值分别为0.61、0.67);ESV和EF值相关性中等或较低(r值分别为0.41和0.33)。结论:RT-3DE能够准确、可靠的定量评价左心功能,用于定量评价心梗患者左心室收缩功能较2D更准确。

Objective：To compare RT-3DE with magnetic resonance imaging（MRI） in measurement of left ventricular（LV） function quantification in myocardial infarction.Methods：We evaluated a total of 33 patients with myocardial infarction who underwent RT-3DE,2D and MRI.Left ventricular ejection function,end-diastolic volume,endsystolic volume,stroke volume were manually assessed for each patient by two blinded readers.Intraobserver variability was calculated using paired-samples t-test and interobserver variability was calculated using analysis of variance of repeated measure.Results：There was no significant difference among the measurements for RT-3DE,2D and MRI of the ventricular function parameters.A strong correlation between RT-3DE and MRI（r=0.81~0.87） was found for all parameters.2D and MRI had a good correlation for EDV,SV（r=0.61,0.67）,and a moderate or low correlation for ESV（r=0.41）,and EF（r=0.36）.Conclusion：RT-3DE will be used in evaluating myocardial infarction cardiac function by clinical routing gradually.