Abstract:
Cardiovascular diseases remain one of the leading causes of mortality globally, particularly in
low- and middle-income countries where access to diagnostic tools is limited. This study
presents the design and development of a low-cost, portable electrocardiogram (ECG)
monitoring device aimed at improving early detection of cardiac abnormalities. The device
integrates a three-lead ECG sensor, a microcontroller-based signal processor, and a Bluetooth
module for real-time data transmission to a mobile application. Performance evaluation was
conducted on 50 subjects, comparing readings from the prototype with a standard hospitalgrade ECG machine. Results showed a 96% correlation in waveform accuracy, demonstrating
the potential of the device for community-level cardiac screening. The proposed system
offers a reliable, affordable, and accessible solution for cardiac monitoring, with possible
integration into telemedicine platforms for remote healthcare delivery.

Keywords: ECG, cardiac monitoring, biomedical device, telemedicine, low-cost design

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