Abstract
For early detection and therapy of heart diseases before problems grow serious, real-time and long-term monitoring and assessment of physiological signals like the electrocardiogram (ECG) is essential. Wearable ECG devices are becoming increasingly important for patients as heart disease becomes more widespread. The principles of portability and noise reduction are examined in this study, as well as recent examples and recommendations for how to enhance them. Specifically, this article focused on electrode mobility, battery power, CMOS resistance feedback ECG amplifiers, and user privacy. Meanwhile, in the noise reduction part, the resources, hardware design, and back-end signal processing approaches are discussed. Wearable ECG devices rely heavily on mobility and noise reduction to assist in preventing and detecting heart disease more effectively. The paper could provide a valuable reference for wearable ECG design.