Karp P J, Katila T E, Saarinen M, Siltanen P, Varpula T T
Circ Res. 1980 Jul;47(1):117-30. doi: 10.1161/01.res.47.1.117.
This paper presents a multipole analysis of the QRS complex of the normal magnetocardiogram (MCG) of six normal subjects. The multipole strengths up to the octupole term were determined from the measured distribution of the z-component of the cardiac magnetic field (the component perpendicular to the frontal plane). This equivalent magnetic multipole generator was found to represent the cardiac magnetic field with a minimum error of less than 10%. The dipolar term of the expansion was found to represent the field distribution with reasonable accuracy early during ventricular activation, whereas late during activation, the higher multipole terms were clearly more significant.
本文呈现了对六名正常受试者正常心磁图（MCG）QRS波群的多极分析。从测得的心脏磁场z分量（垂直于额面的分量）分布确定了直至八极项的多极强度。发现这种等效磁多极发生器能以小于10%的最小误差来表示心脏磁场。结果发现，展开式的偶极项在心室激活早期能以合理的精度表示场分布，而在激活后期，更高阶的多极项显然更显著。
