Construction of a 3-leads cardiac monitor for educational purposes

Abstract

The present work shows the design and construction of a didactic ambulatory prototype for measuring the electrical activity of the heart (ECG). The methodology is based on the theoretical analysis of cardiac biosignals and their acquisition methods, later the design is carried out taking as reference the introduction of equations and circuit diagrams that allow the capture and adaptation of the signal, these being the Obtaining the biosignal performed through surface electrodes connected to the user's extremities and sent to an electrical isolation system to avoid a possible shock to the user; the processing by means of analog electronic circuits for the amplification, filtering and adequacy of the signal, finally an Arduino card is implemented, to digitize the signal and display the information on the screen. Performance tests are performed using a multiparameter simulator that generates electrocardiogram signals with different characteristics to validate that the measurements are reliable.