The degree to which myocardial infarct site and size determine the electrocardiographic axis. Analysis of correlative data by computational modeling.
The degree to which myocardial infarct site and size determine the electrocardiographic axis. Analysis of correlative data by computational modeling.
复制标题
心肌梗塞部位和大小决定心电图轴的程度。
DOI：
10.1016/0002-9149(85)90483-7
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Flowers,NC
中科院分区：
文献类型：
--
作者：
Horan,LG;Havelda,CJ;Hand,RC;Flowers,NC
The spatial electrical QRS axis was determined for 428 twelve-lead electrocardiograms from patients subsequently shown by postmortem dissection to have ventricular myocardial fibrosis or necrosis. Four 16-segment ventricular models of the heart were used to “predict” the spatial electrical QRS axis from known ventricular mass and deficit. The raw model I in ideal anatomic position and vectors perpendicularly outward for each muscle segment showed a mean correlation value of −0.494; model II was rotated in the chest to produce best fit with a correlation of 0.638, but the anatomic orientation was not reasonable; model III maintained original position and orientation but the vectors were scaled (correlation 0.780); and model IV, with nonperpendicular vectors, yielded a mean correlation of 0.793. The exceptions to good predictability formed a distinct subset largely composed of electrocardiograms with some form of variant intraventricular conduction (slight QRS widening, fascicular block patterns and “indeterminate frontal-plane axis”).
