North America leads the ERG Test Device market with a 38% share, driven by advanced healthcare infrastructure, high adoption of wearable technologies, and robust R&D investments. The region benefits from stringent regulatory frameworks ensuring device accuracy and a mature ecosystem of key players. Europe follows at 28%, fueled by an aging population, government-funded healthcare initiatives, and growing demand for non-invasive diagnostics. Asia Pacific (22%) is the fastest-growing region, propelled by rising urbanization, expanding middle-class demographics, and aggressive investments in digital health infrastructure, particularly in India and China.