Image Processing Reference
In-Depth Information
8
A DSP Practical Application:
Working on ECG Signal
Cristian Vidal Silva 1 , Andrew Philominraj 2 and Carolina del Río 3
1 University of Talca, Business Informatics Administration
2 University of Talca, Language Program
3 University of Talca, Business Administration
Chile
1. Introduction
An electrocardiogram (ECG) is a graphical record of bioelectrical signal generated by the
human body during cardiac cycle (Goldschlager, 1989). ECG graphically gives useful
information that relates to the heart functioning (Dubis, 1976) by means of a base line and
waves representing the heart voltage changes during a period of time, usually a short period
(Cuesta, 2001).
Putting leads on specific part of the human body, it is possible to get changes of the
bioelectrical heart signal (Goldschlager, 1989) where one of the most basic forms of
organizing them is known as Einthoven lead system which is shown in Figure 1 (Vidal &
Pavesi, 2004; Vidal et al., 2008).
Fig. 1. Einthoven lead system
1.1 ECG usefulness
The ECG has a special value in the following clinical situations (Goldschlager, 1989):
Auricular and ventricular hypertrophy.
Myocardial Infarction (heart attack).
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