van Oosterom A, Hoekema R, Uijen G J
Department of Medical Physics and Biophysics, University of Nijmegen, The Netherlands.
J Electrocardiol. 2000;33 Suppl:219-27. doi: 10.1054/jelc.2000.20356.
Various measures for quantifying the interindividual variability of the electrocardiogram and the vectorcardiogram in healthy subjects are presented. An analysis of factors that may cause this variability is performed, in particular of the geometrical factors of body size, heart size, heart position, and orientation. The results indicate that the variations in the magnitude of the electrocardiogram as observed through leads placed on the anterior thorax are dominated by the solid angle at which the outline of ventricular mass is seen from points on the thorax. Heart size and body size as such play only a secondary role. The limited spatial sampling of the anterior thorax directly overlaying the heart causes the mean values of all measures of amplitudes in women to be lower than in men. The vectorcardiogram magnitude was found to be much less dependent on overall geometry and heart position, and, hence, also to be less dependent on gender.
本文介绍了多种用于量化健康受试者心电图和向量心电图个体间变异性的方法。对可能导致这种变异性的因素进行了分析，特别是身体大小、心脏大小、心脏位置和方向等几何因素。结果表明，通过放置在前胸的导联观察到的心电图幅度变化主要由从胸部各点观察心室质量轮廓的立体角决定。心脏大小和身体大小本身仅起次要作用。直接覆盖心脏的前胸有限的空间采样导致女性所有幅度测量值的平均值低于男性。发现向量心电图幅度对整体几何形状和心脏位置的依赖性要小得多，因此对性别的依赖性也较小。
