Benameur Narjes, Arous Younes, Ben Abdallah Nejmeddine, Kraiem Tarek
Laboratory of Biophysics and Medical Technologies, Higher Institute of Medical Technologies of Tunis, University of Tunis El Manar, Tunis, Tunisia.
Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
Curr Med Imaging Rev. 2019;15(7):654-660. doi: 10.2174/1573405614666180815115756.
Echocardiography and Cardiac Magnetic Resonance Imaging (CMRI) are two noninvasive techniques for the evaluation of cardiac function for patients with coronary artery diseases. Although echocardiography is the commonly used technique in clinical practice for the assessment of cardiac function, the measurement of LV volumes and left ventricular ejection fraction (LVEF) by the use of this technique is still influenced by several factors inherent to the protocol acquisition, which may affect the accuracy of echocardiography in the measurement of global LV parameters.
The aim of this study is to compare the end systolic volume (ESV), the end diastolic volume (EDV), and the LVEF values obtained with three dimensional echocardiography (3D echo) with those obtained by CMRI (3 Tesla) in order to estimate the accuracy of 3D echo in the assessment of cardiac function.
20 subjects, (9 controls, 6 with myocardial infarction, and 5 with myocarditis) with age varying from 18 to 58, underwent 3D echo and CMRI. LV volumes and LVEF were computed from CMRI using a stack of cine MRI images in a short axis view. The same parameters were calculated using the 3D echo. A linear regression analysis and Bland Altman diagrams were performed to evaluate the correlation and the degree of agreement between the measurements obtained by the two methods.
The obtained results show a strong correlation between the 3D echo and CMR in the measurement of functional parameters (r = 0.96 for LVEF values, r = 0.99 for ESV and r= 0.98 for EDV, p < 0.01 for all) with a little lower values of LV volumes and higher values of LVEF by 3D echo compared to CMRI. According to statistical analysis, there is a slight discrepancy between the measurements obtained by the two methods.
3D echo represents an accurate noninvasive tool for the assessment of cardiac function. However, other studies should be conducted on a larger population including some complicated diagnostic cases.
超声心动图和心脏磁共振成像（CMRI）是评估冠心病患者心脏功能的两种非侵入性技术。虽然超声心动图是临床实践中评估心脏功能常用的技术，但使用该技术测量左心室容积和左心室射血分数（LVEF）仍受采集方案固有多种因素的影响，这可能会影响超声心动图测量左心室整体参数的准确性。
本研究旨在比较三维超声心动图（3D 超声）与 CMRI（3 特斯拉）获得的收缩末期容积（ESV）、舒张末期容积（EDV）和 LVEF 值，以评估 3D 超声评估心脏功能的准确性。
20 名年龄在 18 至 58 岁之间的受试者（9 名对照者、6 名心肌梗死患者和 5 名心肌炎患者）接受了 3D 超声和 CMRI 检查。使用短轴视图的一系列电影 MRI 图像从 CMRI 计算左心室容积和 LVEF。使用 3D 超声计算相同参数。进行线性回归分析和 Bland Altman 图以评估两种方法获得的测量值之间的相关性和一致性程度。
获得的结果表明，在功能参数测量方面，3D 超声与 CMR 之间存在很强的相关性（LVEF 值 r = 0.96，ESV r = 0.99，EDV r = 0.98，所有 p < 0.01），与 CMRI 相比，3D 超声测量的左心室容积值略低，LVEF 值略高。根据统计分析，两种方法获得的测量值之间存在轻微差异。
3D 超声是评估心脏功能的一种准确的非侵入性工具。然而，应在包括一些复杂诊断病例的更大人群中进行其他研究。
