Comparison of magnetocardiography and electrocardiography: a study of automatic measurement of dispersion of ventricular repolarization.
Comparison of magnetocardiography and electrocardiography: a study of automatic measurement of dispersion of ventricular repolarization.
复制标题
心磁图和心电图的比较：心室复极离散度自动测量的研究。
作者：
F. Smith;P. Langley;P. van Leeuwen;B. Hailer;L. Trahms;U. Steinhoff;J. Bourke;A. Murray
目标管理系统
关于心室复极测量值与心电图的离散度的临床意义存在一些争议。最近的研究表明，多通道心磁图（MCG）可以从体表上方的许多部位无创地测量心脏磁场强度，可以提供来自心电图的关于心室复极离散度的独立信息。在本研究中，通过自动测量心室复极离散度来比较心磁图和心电图。
方法和结果
通过同时记录 27 名健康志愿者和 22 名心脏病患者的 MCG 和标准心电图来确定心室复极时间的离散度。使用两种自动技术来确定心室复极的间隔。 ECG 和 MCG 测量之间的心室离散度存在显着差异，在不同技术和所有受试者中，多通道 MCG 比 ECG 多 52 (47) ms [平均值 (SD)] (P<0.00001)，12 通道 MCG 比 ECG 大 17 (40) ms (P<0.004)。心磁图对正常人和心脏病患者的区分能力更强，多通道 MCG 的差异为 46 (18) ms (P<0.017)，12 通道 MCG 的差异为 44 (16) ms (P<0.005)，而 ECG 的差异为 16 (7) ms (P<0.04)。
结论
心磁图能够区分区域心脏传导差异。
AIMS
There is some dispute over the clinical significance of dispersion of ventricular repolarization measurements from the electrocardiogram. Recent studies have indicated that multichannel magnetocardiograms (MCGs), which non-invasively measure cardiac magnetic field strength from many sites above the body surface, may provide independent information from ECGs about ventricular repolarization dispersion. For this study, magnetocardiography and electrocardiography were compared from automatic measurements of dispersion of ventricular repolarization.
METHODS AND RESULTS
Dispersion of ventricular repolarization time was determined in MCGs and standard ECGs recorded simultaneously from 27 healthy volunteers and 22 cardiac patients. Two automatic techniques were used to determine the interval of ventricular repolarization. There were significant differences in ventricular dispersion between ECG and MCG measurements, with multichannel MCG greater than ECG by 52 (47) ms [mean (SD)] (P<0.00001) and 12-channel MCG greater by 17 (40) ms (P<0.004) across techniques and all subjects. Magnetocardiograms had the greater discriminating power between normal and cardiac patients with differences of 46 (18) ms (P<0.017) for multichannel MCG and 44 (16) ms (P<0.005) for 12-channel MCG, compared with 16 (7) ms (P<0.04) for ECG.
CONCLUSION
Magnetocardiography has the power to discriminate regional cardiac conduction differences.