中文摘要：

提出一种提取QRS波群时间-电压面积的新方法,以QRS波群内的一点为基点,向前和向后逐段求出线段参数的WLS估计和线性度,根据线段参数的WLS估计和线性度确定基线,在基线上利用假设检验的方法得出该导联上的QRS波群的起点和终点,在另一导联上用同样的方法求出该QRS波群的起点和终点并最终确定该QRS波群的起点和终点.从而提取了QRS波群时间—电压面积这一特征参数.该方法成功应用于MIT-BIH数据库的QT数据库的所有105个数据文件,在第一组专家标记的3623个QRS波群上获得97.5%的精确度;在第二组专家标记的404个QRS波群上获得98.0%的精确度.为解决非人工交互的实时的心电图计算机自动诊断打下了基础.

英文摘要：

A new method of WLS（weighted least square） estimation-based time-voltage QRS area extraction by dual-lead has been put forward in this paper.Based on the point inside the QRS complexes,the WLS estimations and linear measurements of linear segments from this point have been calculated backward and forward.Based on these parameters,a basic linear segment has been checked out.On the basis of this basic linear segment,the onset and offset of the QRS complex are determined by the hypothesis testing.This method applied to another lead and the final onset and offset have been determined.Therefore the time-voltage QRS area has been extracted.The method has been successfully applied to all 105 records of QT database from MIT-BIH database;it has reached the precision of 97.5% on the 3623 QRSs marked by one group of cardiologists and 98.0% on the 404 QRSs marked by another group of cardiologists.It has made a foundation for real-time and automatic computer-diagnosis of ECG without man-machine alternation.