心电QRS波检测与心室辅助装置控制系统设计

ECG QRS Signal Detection and Control System Design of Ventricular Assist Device

为了实现心室辅助装置辅助时序自动跟踪心电(ECG)信号,本文设计了一套ECG采集电路,基于Lab-VIEW平台实现ECG信号采集、平滑滤波以及QRS波检测,并以QRS波为基准触发心室辅助装置辅助心脏收缩射血,辅助持续300ms后,辅助心脏舒张。经实验效果验证,本系统ECG采集电路抗干扰能力强,无QRS波误检测,无辅助装置误触发,辅助时序能够自动跟踪ECG信号。

In order to achieve auxiliary timing of ventricular assisting device to automatically track the ECG signals, we designed a set of ECG acquisition circuit in our study for the first time. Then we carried out ECG acquisition, smoothing filter and QRS detection on the LabVIEW. With the QRS signal as a benchmark, the control system im- mediately triggered ventricular assisting device to trigger the heart to contract for ejection for about 300 ms, and then to assist to make it relax. The practical effects of the experiment proved that ECG acquisition circuit had the feature of strong anti-interference, and control system had no false QRS detection and no false triggering of assist device. This achieves the auxiliary timing which could automatically track the ECG signal.