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Int J Cardiovasc Imaging. 2012 Mar;28(3):587-93. doi: 10.1007/s10554-011-9865-7. Epub 2011 Apr 16.
Improper electrocardiogram (ECG) lead placement resulting in suboptimal gating may lead to reduced image quality in cardiac magnetic resonance imaging (CMR). A patientspecific systematic technique for rapid optimization of lead placement may improve CMR image quality. A rapid 3 dimensional image of the thorax was used to guide the realignment of ECG leads relative to the cardiac axis of the patient in forty consecutive adult patients. Using our novel approach and consensus reading of pre- and post-correction ECG traces, seventy-three percent of patients had a qualitative improvement in their ECG tracings, and no patient had a decrease in quality of their ECG tracing following the correction technique. Statistically significant improvement was observed independent of gender, body mass index, and cardiac rhythm. This technique provides an efficient option to improve the quality of the ECG tracing in patients who have a poor quality ECG with standard techniques.
心电图导联放置不当导致门控不佳可能导致心脏磁共振成像（CMR）的图像质量下降。一种针对患者的快速优化导联放置的系统技术可能会提高 CMR 的图像质量。在连续的 40 例成年患者中，使用快速的胸部 3 维图像来指导相对于患者心脏轴的 ECG 导联的重新定位。使用我们的新方法和对校正前后 ECG 轨迹的共识阅读，73%的患者的 ECG 轨迹质量有了定性改善，且在纠正技术后，没有患者的 ECG 轨迹质量下降。观察到的统计学显著改善与性别、体重指数和心律无关。该技术为使用标准技术获得质量较差的 ECG 的患者提供了一种有效改善 ECG 轨迹质量的选择。
