Patent ID: 8870780

Claim:
A system for providing BCG (ballistocardiogram) data from a user who is susceptible to movement, the system comprising: a BCG capture device including a heart-characteristic sensor configured and arranged to capture, from the user, a BCG signal for a plurality of a heartbeats from the user and indicative of physical cardiovascular movement of the user while the user stands at a stationary position, including mechanical output of the user's heart; a secondary sensor configured and arranged to detect an indication of a physiologic characteristic of the user, and to provide an output characterizing the detected indication; and a processor circuit, responsive to the BCG capture device and the secondary sensor, the processor circuit being configured to, provide a BCG waveform reference for the BCG signal; and estimate, using the BCG waveform reference, the BCG signal relative to noise present in the BCG signal and due to movement of the user while the user stands at a stationary position and thereby generate an output BCG signal indicative of a condition of the user's heart.