An Engineering Perspective of External Cardiac Loop Recorder: A Systematic Review (original) (raw)

Design and Implementation of a Portable ECG Device

2020

Electrocardiography(ECG) is the technology of measuring the electrical changes of the heart. The electrical change is due to the depolarization and repolarization of the heart cells which produces a specific wave or complex. The potential developed is captured by the electrodes placed on the skin, which ranges in micro to millivolts. Weak signals captured by the electrodes are amplified and converted into a voltage that is readable for microcontroller ATmega328P. ECG is represented by the waves called P, QRS, and T waves. One cardiac cycle of the heart consists of P-QRS-T waves in ECG. The amplitude of the waves, complexes, and the time interval between different waves or segments conveys the total information on the working activity of the heart. A proper study of those waveforms and time intervals on ECG aids to determine and diagnose different cardiac abnormalities. This paper presents a method of extraction of voltage generated during cardiac movement of the human body using an ...

A NEW APPROACH OF THE ECG LOGGER DESIGN USING MICROCONTROLLER

International Journal of Scientific Research and Management Studies (IJSRMS), 2015

There is a need to remotely monitor fully mobile heart patients in their natural environments. The Monitoring of a patient’s ECG waveforms in different conditions can track the diagnosis of a heart disease, which can further be treated to help prolong and improve the life of the patient. If a patient must be monitored without any delay that is associated with delivering data which is stored on a recording device, biotelemetry is necessary. Biotelemetry consists of measuring the biological waveforms to a remote area for recording and processing. Due to the limitations of the currently popular methods of biotelemetry, this paper proposes the use of the microcontroller based hand held ECG logger. It consist of the Isolated circuit that is comprising of an ECG preamplifier and protection circuit with two channels of ECG data, a right-leg drive, low and high pass filters, a gain stage, A/D converter, and the Isolation circuit for the signal lines. This extremely low powered device is designed to consume less than 5mA of power in full operation and Powered by a lithium polymer battery. The device will be very small in size, handy and thickness will also be very less. The topic of this paper is to design the Isolated circuitry of an ECG recorder, and an Wireless link (Transmitter and Receiver) for use in a portable ECG device for cardiac investigation.

DESIGNING A LOW-COST AMBULATORY ECG RECORDER FOR CARDIAC PATIENTS

Proceedings of 10th National Science Symposium, 2018

Ambulatory monitors play an important role in diagnosis of difficult to identify symptoms like dizziness, syncope and palpitation. Also, it is very useful in monitoring efficacy of drug over prolonged period before or after a specific treatment. Here is presented a small work to record single channel-single lead ECG signal in ambulatory fashion with our design. We designed it with AD8232 based amplifier and atmega328 (Arduino mini pro) based microcontroller system. It was tested and found to be useful for the limited objectives fixed for. Further enhancement in its functionality is expected and we are working over it.

Development of Electrocardiograph Monitoring System

MATEC Web of Conferences

Electrocardiograph (ECG) monitoring system is one of the diagnostic tools which can help in reduce the risk of heart attack. A cardiologist may be able to determine heart condition from the ECG signal that recorded from subject. The purpose was to design an ECG monitoring system which consists of ECG circuit and digital signal processing system to deny the unwanted signal. In general, the ECG signal is nature weak and only around 1mV amplitude. Therefore filter and amplifier circuits were designed into 3 stages with a total gain of 1000 to bring the signal to around 1V. Circuit designed included of instrumentation amplifier, bandpass filter and notch filter. The frequency bandwidth of ECG is between 0.05Hz until 100Hz. Schematic circuit was tested by software simulation before proceeding to hardware implementation. Simulation analysis was done by using Software Proteus 8 Professional while the further signal processing was done in MATLAB software environment. A PQRST ECG waveform ca...

Design Of Cost Effective Ecg Signal Acquisition System

2019

Electrocardiography (ECG) is the interpretation of the electrical activity of one’s heart over a period of time. Recently, it is found that many people are suffering from various heart diseases due to their lifestyle changes and food habits. So, it is important to monitor their heart rate from time to time. The ultimate aim of the project is to design a low cost circuit and to reduce the complexity. This paper aims at observing the patient’s heart rate continuously so that the irregularities can be detected in the early stages. Here, the wireless transmission is implemented using the HC-05 Bluetooth module.

Design and Development of a Low Cost Personal Computer Based ECG Monitor

Bangladesh Journal of Medical Physics, 2013

ECG equipment is vital for diagnosis of cardiac problems. However, such equipment come from the rich Western countries at a huge cost in both procurement and maintenance, and therefore cannot offer services to a large population in the Third World countries. The only solution is to design and develop such equipment in individual countries by developing local expertise. With three decades of experience, the Dhaka University group has taken a step towards developing prototypes of ECG equipment for dissemination to the healthcare service providers. This paper presents the detailed design of an PC based ECG equipment where optimized choice of components and of the design have been made keeping the cost and maintenance in view, but not sacrificing the quality, and incorporating necessary safety features to protect the patient from known hazards. Both the hardware and the software have been developed locally and are detailed in this paper. Outputs obtained from human subjects are shown wh...

Development of a Low Cost ECG Data Acquisition Module

The paper describes the development of a low cost and simple amplifier circuit for ECG acquisition from a single lead. The acquisition circuit uses clip-type flat metal plate limb electrodes to sense the heart signals and a basic amplifier circuit is designed using JFET OP-AMP IC LF-353 with the required gain to suitably amplify the signal. The amplified data fed into a computer using USB-6009 is then denoised, processed and displayed using LabVIEW software. The developed ECG acquisition module is evaluated by visual comparison of simultaneously recorded data acquired by the module with and by the MP-150 amplifier system from BIOPAC Systems Inc. Tests have been performed in the laboratory on several volunteers in the age group of 28-60 and the results were quiet satisfactory.

Design, implementation and evaluation of amicrocomputer-based portable arrhythmia monitor

Medical & Biological Engineering & Computing, 1984

I n t r o d u c t i o n 1.1 Background HOL-rER (1961) first described a tape recorder for continuously recording the ECG from ambulatory subjects. Holter recorders have since been widely used for recording up to 24 h of the ECG. WEBSTER (1978) reviews the recent developments in Holter tape recorders and playback systems, and their clinical applications. ECG analysis is performed at high speeds-usually manually by a trained nurse, but occasionally semiautomatically or automatically by a computer (RIPLEY and MURRAY, 1980). This has led to improved health care and improved clinical investigation. For example, OLWER et al. (1974) have used the ARGUS/H system to investigate the relationship between myocardial infarction and sudden death by periodically monitoring for up to three months. Although there are a number of clinical applications and the effectiveness of ambulatory monitoring has been proved, the task of data collection and processing is slow, time consuming and expensive. Computers have begun to play a significant role in Holter data storage, data reduction, and analysis. OLIVER et al. (1974) review the subject of automated arrhythmia detection. RWLEY and MURRAY (1980) list the specifications of various commercial and research arrhythmia detection systems.

Design and Development of a PC based ECG Equipment

Bangladesh Journal of Medical Physics, 2014

ECG is very important for diagnosis of cardiac disorders but most ECG equipment come from developed countries with very costly procurement and maintenance. Therefore, unless the technology is developed indigenously, common people in countries like Bangladesh will not get the benefits of modern healthcare technology. With the advent of personal computers (PC) at low cost, a PC based ECG equipment is also worth developing since many people already own a PC, thereby reducing the overall cost. With this view a PC based ECG equipment was designed and developed from the basics. An attempt was made to utilize maximum components and spares available in the local market. The main unit is based on a low cost but quality instrumentation amplifier IC with high common mode rejection ratio. Active filters were designed using common operational amplifier ICs. Right leg drive circuitry to reduce 50Hz noise of mains ac was kept as an option. Analog signal switching circuitry was used to obtain 12 Le...

Design of Portable ECG Monitoring System Based on LM4F120H5QR

The ECG acquisition circuit in the market now exists such defects as having complex structure , large size, high power consumption and overpriced, so to design a portable ECG monitor without the above mentioned disadvantages is urgently needed. The monitor designed by this paper uses ARM Cortex-M4 core processor LM4F120H5QR, and selects ADAS1000-3 as signal acquisition unit to reduce the amplification processing of ECG signals, in order to have a long period of ECG monitoring, the SD card is used as the storage medium. To realize the multi task processing and application management, the RT-Thread operating system is adopted. The digital signal processing technology is implemented by programming to replace the hardware filtering processing, which can save the circuit board size and reduce the power consumption. At the same time,the use of GPRS module for remote data transmission with PC monitoring interface can help doctors a remote diagnosis. Slave computer displays the collected ECG signal waveform and information on Colour LCD screen. After the comprehensive simulations and prototype tests, the results show that the system can achieve the success of the ECG signal acquisition, processing, storage, display and remote transmission. That’s the instrument has a good prospect.