Low-cost MCU solution for measuring HRV using SpO2 sensor

In this paper, a low-cost Heart Beat Variability (HRV) analyzer base on the principle of Photoplethysmography (PPG) is presented on an ultra-low power MCU platform. It is a non-invasive method of measuring the variation in blood volume in tissues using a light source and a detector. Base on the blood variation, the proposed HRV device will be able to calculate the heart beat rate, level of oxygenation and HRV data. In emergency, the specific information will be send back to the ICU center through the 3G-WCDMA interface, where caregivers can further analyze it and determine treatment methods.