Processing of simultaneous biomedical signal data in circulatory system conditions diagnosis using mobile sensors during patient activity

This paper describes the process of acquiring, processing and interpreting biomedical data gathered using a mobile telemedical device. The device utilizes a piezoelectric-quartz sensor for heart sound analysis, three lead ECG monitor, and accelerometer and a gyroscope. The device prototype proved to provide sufficient quality signal to be used as a heart monitor. During testing, the patient first undergoes an ambulatory medical examination that provides reference information. Then, by utilizing a mobile recorder it is possible to perform on-line simultaneous measurements during every day activities. The data gathered is then filtered, classified and processed to obtain significant information about the patient condition. The data gathered during inactive periods corresponded to ambulatory measurements. However, during activity the marker values obtained varied significantly from ambulatory data, which implies the need for further research and norm construction.