Nousiainen J, Oja S, Malmivuo J
Ragnar Granit Institute, Tampere University of Technology, Finland.
J Electrocardiol. 1994 Jul;27(3):221-31. doi: 10.1016/s0022-0736(94)80006-5.
The vector magnetocardiogram (VMCG) has been measured with the corrected unipositional VMCG lead system and analyzed statistically in 290 normal subjects. The morphologic study of the QRS waveforms showed that in the right-to-left (X) component, the triphasic qRs waveform appeared in 55% of the subjects. The superoinferior (Y) component was characterized by a prominent S wave in 96% of the subjects, and the anteroposterior (Z) component was also characterized by a prominent S wave in 95% . The VMGs were compared with the vector electrocardiograms (VECG) recorded in a subgroup of 200 subjects, in whom both the VMCG and VECG were available for computer analysis. The normal variability of the spatial vector magnitude measurements was significantly greater in the VMCG than in the VECG. Some similarities were observed in the waveforms of the time-averaged QRS complexes between the VMCG and VECG. Multiple linear regression analysis between the VMCG and VECG showed that maximally 27, 45, and 41% of the variation in the instantaneous QRS X, Y, and Z amplitudes of the VMCG, respectively, could be explained by the instantaneous X, Y, and Z amplitudes of the VECG.
采用校正后的单位置心磁图导联系统对290名正常受试者进行了心磁图（VMCG）测量，并进行了统计学分析。QRS波形态学研究表明，在左右（X）分量中，55%的受试者出现三相qRs波。在上下（Y）分量中，96%的受试者以明显的S波为特征，在前后（Z）分量中，95%的受试者也以明显的S波为特征。将200名受试者亚组的心磁图（VMG）与同时记录的心向量图（VECG）进行比较，这200名受试者同时拥有可用于计算机分析的心磁图和心向量图。心磁图空间向量大小测量的正常变异性显著大于心向量图。在心磁图和心向量图的时间平均QRS复合波波形中观察到一些相似之处。心磁图和心向量图之间的多元线性回归分析表明，心磁图瞬时QRS X、Y和Z振幅变化中，分别最多有27%、45%和41%可由心向量图的瞬时X、Y和Z振幅解释。
