【摘要】 目的:探讨64层螺旋CT冠状动脉成像心电编辑功能对于改善心律失常或心电图信号不明原因故障中冠脉成像质量的作用。方法:搜集30例在检查前已知心律失常或仅在检查过程中出现心律失常或检查过程中出现同步记录的心电图信号部分缺失的64层螺旋CT冠状动脉成像资料,使用心电图编辑功能,比较编辑前后重建的冠状动脉图像质量。结果:对于低心率(<70次/分)的房性早搏(扫描过程中出现一次),心电编辑软件可以有效改善其冠脉图像质量,编辑前后可评估率差异有统计学意义(P<0.05);对于房室传导阻滞、心电信号缺失冠脉图像质量可以有限度地改善,对房颤改善不明显。对于高心率(≥70次/分)的房性早搏(扫描过程中出现一次)、房室传导阻滞,心电编辑软件均可有限度地改善,对房颤改善不明显,编辑前后可评估率差异无统计学意义(P>0.05)。对心率不同的两组心律失常,低心率组图像质量可评估率(74.74%)高于高心率组(66.07%),心电编辑软件均可改善两组图像质量,但两组间比较差异无统计学意义。对于窦性心律不齐,心率波动幅度越大,冠脉图像不可评估率越大,两组心电编辑后图像质量均得到明显改善,差异有统计学意义(P<0.05)。结论:在检查前或检查过程中出现的心律失常或者不明原因出现心电信号的异常,使用心电编辑功能,能提高冠脉成像质量。更多还原

【Abstract】 Objective:To investigate the value of ECG editing software in improving the image quality of coronary angiography with 64-slice spiral CT(MSCTCA) in patients having arrhythmia or unidentified synchronous ECG error.Methods:MSCTCA materials of 30 patients with previously known arrhythmia/arrhythmia merely occurred during MSCTCA/unidentified ECG mechanic error happened during examination were included in this study.Using ECG editing software,the image quality of MSCTCA before and after editing were compared.Results:For patients with low heart rate(<70/min) and atrial premature beats(appear once in the scanning process),the image quality of MSCTCA was effectively improved after ECG editing,with significant statistical difference before and after-editing(P<0.05);for patients with atrio-ventricular block or partial ECG signals missing,the image quality of MSCTCA showed a limited improvement after editing;there was no obvious quality improvement in patients having atrial fibrillation.For patients with arrhythmia and heart rate ≥70/min,the image quality after ECG editing showed limited improvement in having atrial premature beats(appear once in the scanning process) and atrio-ventricular block,no obvious improvement was assessed in patients with atrial fibrillation.There were no significant statistical differences before and after ECG editing(P>0.05).For the two groups of arrhythmia patients with different heart rate,the image quality could all be improved by ECG editing,but with no significant statistic difference.The evaluation rate of image quality of MSCTCA in low heart rate patients was 74.74%,which was higher in patients with high heart rate(66.07%).For patients with sinus arrhythmia,the image quality evaluation rate lowered as the increase of heart beat fluctuation extent.Significant statistical difference before and after editing was assessed(P<0.05).Conclusion:The image quality of MSCTCA could be improved with ECG editing in patients with arrhythmia/arrhythmia occurred during examination or having unkown mechanic ECG signal abnormalities.更多还原