ECG Acquisition in a Computer - ECG Acquisition and Automated Remote Processing - page 66

Fig. 3.14 Developed GUI for PC-based ECG acquisition

V ðÞ¼ Digital value

½ ðÞ digital equivalent of bias voltage 19 : 6

Analog m ðÞ value

Total amplification achieved in Amplifiers

ð 3 : 8 Þ

where 19.6 mV corresponds to the resolution of the ADC.
The flowchart of the MATLAB algorithm is given in Appendix 2. The lead data
are finally stored in a two-column time-stamped data file for future processing.

3.6 GUI-Based Front End for ECG Acquisition System

Nowadays, graphical user interfaces have become an integral part of any appli-
cation software. MATLAB provides an easy-to-develop platform with most
common tools for graphical user interface development. Hence, a user interface
developed in MATLAB provides additional advantage of using the powerful
computational tools. In recent years, there has been extensive use of MATLAB
GUI in biomedical applications [ 28 - 29 ]. In the developed ECG DAS as described
in Sects. 3.4 , 3.5 , the objective is to provide a simple easy to interface to the
operator at the healthcare clinic for collection of patients' ECG. The interface