Caiani Enrico G, Coon Patrick, Corsi Cristiana, Goonewardena Sascha, Bardo Dianna, Rafter Patrick, Sugeng Lissa, Mor-Avi Victor, Lang Roberto M
Noninvasive Cardiac Imaging Laboratory, University of Chicago, Chicago, Illinois, USA.
J Am Soc Echocardiogr. 2005 Dec;18(12):1292-8. doi: 10.1016/j.echo.2005.06.008.
Real-time 3-dimensional echocardiographic continuous imaging (CIM) with contrast underestimates left ventricular (LV) volumes. We studied the effects of dual-triggered (DT) acquisition on the accuracy of LV volume measurements for patients with poor acoustic windows. Real-time 3-dimensional echocardiographic imaging was performed in 20 patients during LV opacification (Definity) on the same day as cardiac magnetic resonance imaging. Both CIM and DT data were analyzed using custom software to calculate end-systolic volume (ESV) and end-diastolic volume (EDV), which were compared with the cardiac magnetic resonance reference. CIM correlated well with the cardiac magnetic resonance reference (EDV: r = 0.89; ESV: r = 0.93), but underestimated EDV and ESV by 17% and 19%, respectively. In contrast, DT resulted in higher correlation (EDV: r = 0.95; ESV: r = 0.96) and smaller biases (9% and 6%, respectively). In conclusion, because the accuracy of LV volume measurements depends on the acquisition strategy of contrast-enhanced real-time 3-dimensional echocardiographic images, the use of DT instead of the conventional CIM acquisition is recommended.
实时三维超声心动图连续成像（CIM）联合造影剂会低估左心室（LV）容积。我们研究了双触发（DT）采集对声学窗不佳患者左心室容积测量准确性的影响。在与心脏磁共振成像同一天，对20例患者在左心室显影（使用Definity）期间进行实时三维超声心动图成像。使用定制软件分析CIM和DT数据，以计算收缩末期容积（ESV）和舒张末期容积（EDV），并与心脏磁共振成像参考值进行比较。CIM与心脏磁共振成像参考值相关性良好（EDV：r = 0.89；ESV：r = 0.93），但分别低估EDV和ESV 17%和19%。相比之下，DT具有更高的相关性（EDV：r = 0.95；ESV：r = 0.96）和更小的偏差（分别为9%和6%）。总之，由于左心室容积测量的准确性取决于造影剂增强实时三维超声心动图图像的采集策略，因此建议使用DT而非传统的CIM采集。
