Coronary artery motion during the cardiac cycle and optimal ECG triggering for coronary artery imaging
Coronary artery motion during the cardiac cycle and optimal ECG triggering for coronary artery imaging
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DOI：
10.1097/00004424-200105000-00002
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发表时间：
2001-05-01
影响因子：
6.7
通讯作者：
Budoff, MJ
中科院分区：
文献类型：
--
作者：
Lu, B;Mao, SS;Budoff, MJ
基本原理和目标，我们的目的是研究冠状动脉的运动特征，并确定心动周期期间的最佳心电图 (ECG) 触发时间，以尽量减少运动伪影。方法，对 70 名受试者进行电子束断层扫描 (EBT) 图像的对比度增强多层电影研究，EBT 数据集以 58 毫秒的间隔覆盖整个心动周期，通过 ECG 获取心脏的短轴视图结果,在整个心动周期中,三大冠状动脉的运动变化很大,并随着患者基线心率的增加而增加,确定了心动周期中冠状动脉运动的最大和最低速度,根据心动周期中右冠状动脉运动的最低速度,最佳心电图触发时间位于35%左右静息心率小于或等于每分钟 70 次 (bpm) 的患者，R-R 间期的 (31.4%-37.6%) 或 70% (68.7%-71.4%)； 71 至 100 bpm 组中 R-R 间隔的 50% (47.2%-61.1%)；在 > 100 bpm 组中，在 R-R 间期的 55%（52.8%-59.1%）处，我们的数据表明，左旋支动脉的运动特征与右冠状动脉的运动特征非常相似，并且左冠状动脉前降支在整个心动周期中的运动没有显着差异。每切片需要 35.4 至 75.5 毫秒的最小扫描速度才能完全消除心脏运动伪影（平面内冠状动脉运动
RATIONALE AND OBJECTIVES, Our purpose was to investigate the motion characteristics of the coronary arteries and determine optimal electrocardiographic (ECG) trigger time during the cardiac cycle to minimize motion artifacts,METHODS, Contrast-enhanced multislice movie studies of electron beam tomography (EBT) images were performed on 70 subjects, The EBT datasets, which covered an entire cardiac cycle at 58-ms intervals, were acquired for a short-axis view of the heart with ECG triggering, The pixel values along x and y axes were measured at multiple intervals during the cardiac cycle to establish the motion distance and velocity of three major coronary arteries,RESULTS, Coronary artery motion varied greatly throughout the cardiac cycle in three major coronary arteries and increased with the patient's baseline heart rate, The greatest and lowest velocities of coronary arterial movement during the cardiac cycle were determined, Based on the lowest velocity of right coronary artery movement during the cardiac cycle, the optimal ECG trigger times were located at approximately 35% (31.4%-37.6%) or 70% (68.7%-71.4%) of the R-R interval in patients whose resting heart rate was less than or equal to 70 beats per minute (bpm); at 50% (47.2%-61.1%) of the R-R interval in the 71- to 100-bpm group; and at 55% (52.8%-59.1%) of the R-R interval in the >100-bpm group, Our data demonstrated that the motion characteristics of the left circumflex artery were quite similar to those of the right coronary artery and that the left anterior descending coronary artery had no significant differences in motion throughout the cardiac cycle. A minimum scan speed of 35.4 to 75.5 ms per slice is needed to completely diminish cardiac motion artifacts (in-plane coronary artery motion with