Desenvolvimento e avaliação experimental de um dispositivo vestível multimodal para aquisição de sinais cardiovasculares

Abstract

This paper presents the development of a low-cost wearable device for the acquisition and experimental analysis of non-invasive cardiovascular signals. The system is based on the simultaneous acquisition of Electrocardiogram (ECG) and Photoplethysmography (PPG) signals, processed by an ESP32-C3 microcontroller. As a main focus, a comparative analysis of the performance of dry stainless steel and 1000 silver electrodes was conducted, evaluating ECG signal quality metrics such as noise level, QRS complex amplitude, and signal-to-noise ratio. Additionally, a qualitative comparison was made with commercial devices for non-clinical use, such as home pulse oximeters and smartwatches. The results obtained demonstrate the technical feasibility of the prototype as an experimental and educational platform for acquiring cardiovascular signals, respecting the limitations inherent to a low-cost academic prototype.