Microcontroller based data acquisition system for Heart Rate Variability (HRV) measurement

Abstract

Heart rate variability (HRV) is a reliable index and reflection of the many physiological factors modulating the normal rhythm of the heart. In fact, this provides a powerful means of observing the interplay between the sympathetic and parasympathetic nervous systems. Heart Rate (HR) is a non stationary signal; its variation may contain indicators of current disease, or warnings about impending cardiac diseases. The indicators may be present at all times or may occur at random during certain intervals of the day. Hence t is strenuous and time consuming to study and pinpoint abnormalities in voluminous data collected over several hours. Therefore HR variation analysis (instantaneous HR against time axis) has become a popular noninvasive tool for assessing the activities of the autonomic nervous system. Computer based analytical tools for in-depth study of data over daylong intervals can be very useful in diagnostics. Therefore, the HRV signal parameters, extracted and analyzed using computers, are highly useful in diagnostics. Here we present an inexpensive AVR microcontroller based data acquisition system with computer interface. Typical data collected is presented and analyzed using Poincare plot and Rescale Range analysis technique and thus fractal dimension of the time series of HR signal is determined and details discussed.

Microcontroller based RR-Interval measurement using PPG signals for Heart Rate Variability based biometric application

“…Only RR-Interval is required for HRV analysis and it is traditionally measured from ECG signals. Researchers have documented evidences in favor of PPG to surrogate ECG for HRV analysis [1][2][3]. PPG based detectors use the mechanical activity of the beating of the heart to identify a beat in contrast to ECG where electrical activity is monitored.…”

“…The data acquisition and computer interface part very much resemble the system used for recording real time parameters during fractal growth [8] and is radical modification and improvisation of an earlier design [1], few limitations like data size restriction and sampling time resolution are taken care of and improvised. The proposed system consists of three main units, i.e.…”

“…With this in view we developed an RRI measurement and data acquisition system that can be interfaced with a computer using serial or USB port. New generation desktop PC's and laptops are not equipped with the classical printer (parallel) port, therefore the design is improvisation to our previous work which employed parallel port of PC [1]. This design provides additional features and can be connected to computer through serial port or USB port (using a serial to USB bridge), this makes the system more flexible and versatile.…”

Can a Smartband be Used for Continuous Implicit Authentication in Real Life

“…One of the most essential properties of this signal is the Heart Rate Variability (HRV). Although research in the past mostly focused on the connection between HRV and different types of health disorders [7], the validity of using HRV for biometric recognition is supported by the fact that the physiological and geometrical differences of the heart in different individuals display certain uniqueness in their HRV features [8].…”

Design of Electro Cardiograph Machine Based on Atmega Microcontroller

“…ECG machine on the market, has the price is quite expensive, so it is not accessible to the public medium or small clinics in addition to the technology used is difficult to understand, if the device is damaged very difficult and many electronic circuits are secret. Technological knowledge microcontroller for ECG machine design has been done by several researchers, including microprocessor-based physiological signal monitoring and recording system for ambulatory subjects (Kao, 1995) [4] Development of a Portable ECG linux-Based Measurement and Monitoring System (Without Hsu, 2011) [5], Research of portable ECG Monitoring Device (Geng huang Yang, 2012) [6], Design of the intelligent simple Electrocardiograph (Sun, 2012) [7], Microcontroller-based data acquisition system for Heart Rate Variability (HRV) measurement (Akhter, 2012) [8], Two Low-Cost Solutions for Cardiac Mobile Monitoring (R.I. Gonzalez, 2008) [9], Novel compact micro strip low pass filter with sharp transition and improved stop band (Ping Juan Zhang,2015) [10], Fast Distance Protection for Proximal Fault of EHV Transmission Line (Li Zhenkun,2013) [11], Designing ECG mini one channel with graphic display LCD (Triwiyanto, 2014) [12].…”