Embedded System for the Simultaneous Study of SAHS and Cardiac Arrhythmia

This letter presents a proposed embedded system for the simultaneous study of sleep apnea/hypopnea syndrome (SAHS) and related cardiac arrhythmias, which can affect about 1 billion people worldwide. Its objective is to become a tool to research the relational causes of these disruptions. It can record biomedical signals and vital parameters related to cardiac and respiratory activity commonly used in clinical practice. The system is designed to be used in sleep studies, providing greater comfort to users by integrating two devices into one. The proposed system is battery powered and has Bluetooth wireless communication for remote studies. The design is based on specific electronic components, such as analog front-end and system on chips, and best-practice guidelines for PCB design were followed. A hybrid-scheduler was selected as software architecture to ensure the task execution at specific intervals. The system’s signal quality recording subsystem was tested using a multiparametric simulator, commercial Holter device, and acquired real records. The results are similar to other works.