The Review of Technology in Monitoring the Heart Health of the Elderly Muhammad Sobri, Mohamad Taha Ijab, Norshita Mat Nayan, Alexander Edo Tondas and S. Fipiariny E3S Web Conf., 448 (2023) 02029 Published online: 17 November 2023 DOI: 10.1051/e3sconf/202344802029