Abstract:
Electrocardiogram (ECG) generated by an electrical physiological device, called as electrocardiograph, is used to investigate and diagnose for analyze the electrical signal of the heart. However, the noise from the movement such as running known as motion artifact noise which is difficult to filter out of the ECG during the stress test. The noise from motion artifacts corrupts the desired signal and thus reduces the reliability of stress test results. This research aims to demonstrate a reduction of motion artifact for wireless three-lead ECG device using microcontroller to improve the investigate in ECG stress tests. The ECG signals are obtained by the device, and the motion artifact noise is filtered by using the adaptive filter based on Least Mean Square (LMS) algorithm. An accelerometer are attached to the subject and used as a sensor to provide motion data to create a reference signal for noise cancellation to get the desired ECG signal using Labview. The result of the adaptive filtering has shown some improvement on the stress test ECG signal with reduce amplitude of signal at 2 dB and have some delay of calculation which depend on the subject.