Does smartwatch-based blood pressure measurement provide accurate readings in normotensive and hypertensive patients compared to traditional sphygmomanometers?
Smartwatch-based blood pressure measurement using the Samsung Galaxy Watch Active 2 is not yet ready for clinical use due to systematic bias and insufficient accuracy.
This study demonstrates that the BP measurements by the Samsung Galaxy Watch Active 2 show a systematic bias toward a calibration point, overestimating low BPs and underestimating high BPs, when investigated in both normotensive and hypertensive patients. Standards for traditional non-invasive sphygmomanometers are not met, but these standards are not fully applicable to cuffless devices, emphasizing the urgent need for new standards for cuffless devices. The smartwatch-based BP measurement is not yet ready for clinical usage. Future studies are needed to further validate wearable devices, and also to demonstrate new possibilities of non-invasive, high-frequency BP monitoring.
Falter et al. (2022) studied this question.