Electrocardiograph Signal Acquisition Research Articles

Design and Application of Human Movement Respiratory and ECG Signal Acquisition System

To realize the design of mobile phone human movement breathing and electrocardiograph (ECG) signal acquisition system based on Bluetooth transmission, the principle of the generation and detection of ECG and respiratory signal and the guide system of signal acquisition are analyzed. Additionally, the hardware of the system is designed, including the hardware of the signal acquisition system, the design of ADS1292R ECG and respiratory signal acquisition module, the design of the main control chip and the design of the Bluetooth module. Then, the digital filtering processing of the ECG and respiratory signals is completed, including the baseline drift filtering and the suppression of the power frequency interference. The results show that the monitoring system runs well and it can effectively collect ECG and respiratory signals, calculate heart rate and respiratory frequency in real time, and display ECG waveform in real time. To sum up, the monitoring system is of great significance for real-time monitoring of the patient's condition.

Interference Reduction and Common Mode Rejection in Electrocardiograph Signal by Removing the Ground Electrode

Rejection of common mode voltages in biosignals is a crucial issue specially in acquiring electrocardiograph (ECG) signal susceptible to a significant interference due to the surrounding sources of noise. The identification and minimization of these common voltages and sources of interference are necessary to acquire such signal because its level is low (few millivolts) compared with these undesirable common voltages generated by the surrounding environment. We investigate different sources of interference and common voltages coupled to an ECG signal and analyze techniques to reject and mitigate their effects. We propose the elimination of the ground electrode and study its efficiency to reduce common-mode voltages and improve the rejection ratio of the bioamplifier. We provide a qualitative ECG signal acquisition with a sophisticated analog front-end architecture, resulting in an accurate ECG signal detection and an improved common-mode and isolation-mode rejection.

The ECG Data Storage System Design Based on SD Card and Reliability Analysis

The ECG data storage system based on 32-bit stm32 microprocessor, parsing complicated communication protocol of BMD101 electrocardiograph signal acquisition module. It is implemented that ECG data real-time storage of BMD101 of high sampling rate with SPI serial bus to carry out the serial correspondence between SD card and chip. This paper uses the physionet medical packet to analysis the difference between HRV of two groups of ECG data which reflects the reliability of the ECG data storage system. The analysis results show that the storage system with almost no loss of ECG data, stable performance, can realize ECG data storage for a long time.

ECG Signal Acquisition with on Chip Compression Algorithm

In this paper ECG signal acquisition and compression of the ECG signal is presented. ECG is an electronic method of recording the heart beat of the patient. The characteristic of heart beat is determined by PQRST curve. The detection of QRS complexes in an ECG signal provides information about the heart rate. This paper includes all the details about how to get the proper ECG signal and how it can be compressed. The paper presents an Electrocardiographic (ECG) signal front-end amplifier or pre-amplification of ECG for further processing. The signal conditioning contains amplification and filtering. Compression is required for the fast transmission of ECG signal over wireless network and to reduce the amount of data storage in long-term ECG recording. A new algorithm named Partition Algorithm is proposed for ECG signal compression and reconstruction which involves the partitioning of input signal into eight digital threshold levels which are further reconstructed. Also, it is proved that eight threshold levels are sufficient for providing the necessary ECG information in digital format.

From Holter Monitors to Automatic Defibrillators: Developments in Ambulatory Arrhythmia Monitoring

In 1961, Holter reported a design of a tape recorder that acquired and stored electrocardiographic (ECG) signals from ambulatory patients. This made long-term monitoring of patients in their day-to-day environments possible. The next generation of devices employ microcomputer circuits for automatic interpretation of cardiac arrhythmias. Implantable pacemaker also show some arrhythmia interpretation capability. A special case is the automatic implantable defibrillator which recognizes the ventricular fibrillation signal. We present here the details of the original Holter recorder, the microcomputer-based arrhythmia monitor, and the automatic implantable defibrillator. In conjunction with the historic account of these developments, we present the current techniques of ambulatory ECG signal acquisition, processing, arrhythmia detection, and performance evaluation of automated arrhythmia detectors.