Desenvolvimento de um eletrocardiógrafo portátil de três canais para aquisição e transmissão de sinais de ECG via aplicativo móvel

Abstract

This present paper approached the development of a portable three-channel electrocardiograph to acquisition and transmission of electrocardiogram signals via mobile app, through which aspects inherent to the cardiac system and coronary electrical activity were exposed. The bibliographic review and theoretical framework allowed a wide understanding of the heart electrical activity, as well as the generated waveforms and its interpretation. The electrocardiograph was designed in three stages, which consisted of the signal amplification right from an ECG simulator, filtering the noise and signal pre-existing interferences, that where attenuated with the use of High Pass, Notch and Low Pass designed filters, and analog/digital (A/D) signal conversion, for the implementation in the mobile application. From this, the printed circuit board responsible for amplifying and filtering the signal was developed, which was implemented in an application developed for Android mobile devices on MIT APP Inventor platform, displaying the collected ECG in real time and allowing the qualified health professional to add the report and still forward it directly to the patient. The A/D conversion and data processing were performed with the aid of the Arduino platform. The prototype was developed in a portable way, guaranteeing the viability of the system, since it uses the synchronism with Bluetooth.