TJ-Ⅳ型VCG微机自动分析系统的研制与临床应用

Development and Applications of an Auto-Analyzing System for Model TJ-Ⅳ Vector-Cardiogram

研制TJ-Ⅳ型心电向量图微机自动分析系统。与人工测算结果相比,本系统对正交心电图P波、Q波、R波、S波、R'波、S'波、T波起点和止点识别的准确性达98％,对各波谷点和峰点的识别准确性达100％。该系统开发诊断参数591项,包括46项创新指标。分析其中12项指标.人工测算结果与微机自动测算结果基本一致。该系统解决了心电向量图检测与分析中所存在的若干技术难题.提高了本系统抗干扰性能和安全性能,图形自动识别准确率高,测算参数精确度高,检测速度快。

A new computer-assisted vector-cardiogram analyzing system Model TJ-Ⅳ developed based on Model TJ-Ⅲ, has been using in the routine clinical work in order to evaluate its features and performances. The system employs a 586 computer with a CPU of 120 MHz, a special low-noise amplifier, a 12 bit A/D tranducer and the C language for programming. The examinations of 206 cases were performed and all the vector-cardiograms were analyzed by the computer system and by manipulative methods respectively. In comparison with the manipulative methods the system has a very high accuracy of picture-recognition. The accuracy for distinguishing the onsets and terminals of orthogonal ECG waves is 98% while that for distinguishing the peaks and troughs of the waves is 100%. These waves include P, Q, R, S, R' and S' waves. The new system is capable to provide the parameters of more than 591 items, including 46 newly-developed diagnostic parameters. The testing and analyzing of 12 parameters of orthogonal ECG and plane VCG have proved that the results of the aboved two methods have no difference. The new system has a very high accuracy of picture-recognition and index calculation with many technical problems existing in the old versions, solved - a great improvement of safety and anti-interference and an increase of the detecting & diagnostic speed.