One embodiment of the present invention is directed to a print media coating device that includes a web supply, a web take-up, a fuser, and a web cooler downstream in the media path from the fuser. The motion sensor can be built into a printed circuit board allowing for simple and cost effective manufacturing. Responsive to the detected change, a distribution of an electrical, mechanical, or electromechanical parameter related to contractile function of a heart chamber with respect to locations of multiple electrodes disposed within the heart chamber is determined.