Real-time QRS detection using adaptive threshold

摘要

Portable system for analyzing ECG data comprises an analog front-end module coupled to the portable consumer device. Analog front-end module is composed of one or more leads to collect ECG data is operable to convert the analog ECG data into digital ECG data. Portable consumer devices such as smartphones (400) is coupled to receive the digital ECG data (150), using a filter (436) with cut-off frequency is adapted to the noise level in real time, QRS detection (451) configured to to run. ECG signal is non-linearly amplified (431), three windowed threshold signal (D, E, J) is derived. Cut-off frequency for the QRS detection can be dynamically selected as a function of a threshold signal (439). Sample value is equal to the first threshold signal, and only if greater than the filtered threshold signal, samples of the amplified signal is identified as the heart beat points. .BACKGROUND 4