Miniaturized 3D accelerometers placed on the heart can assess global and regional function in a closed-chest model. The technique may be used for continuous postoperative monitoring after cardiac surgery.

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In this paper a new design for an implantable MEMS acceleration sensor for heart monitoring is described. Based on one of the smallest commercially available accelerometers we have developed a miniaturized system that allows for implantation into the heart muscle and to be used in closed chest application. The paper also assesses the mechanical strength of different cable to substrate bonding methods. As a result the built system is ready for animal experiments which are essential to verify if the presented design is appropriate.