NigaAmanj Hussain and Aree Ali Mohammed 2025. An IoT-Based Vital Signs System for Early Heart Attack Detection. Journal of Sensors, IoT & Health Sciences (JSIHS,ISSN: 2584-2560). 3, 4 (Dec. 2025), 17–30. DOI:https://doi.org/10.69996/jsihs.2025017.