Medtronic, Inc.

Michael Andrew Reinert

Todd Jon Sheldon

James Kevin Carney

Can Cinbis

David A Anderson

Michael B Terry

Eric R Williams

Kenneth D Rys

Xiaonan Shen

Aspects of the present disclosure include a medical device system including an implantable medical device and an external device with three or more electrodes configured to contact a patient's skin. The external device either transmits or receives a test signal to or from the implantable medical device using a plurality of possible receive dipoles, where each possible receive dipole is formed by a pair of electrodes. A signal quality monitor, either at the implantable medical device or at the external device, measures a signal quality for the possible receive dipoles.

Determination of dipole for tissue conductance communication

A relatively compact implantable cardiac medical device includes a wireless communications module, which employs a directional antenna and which is adapted to receive input concerning ventricular wall motion. When the cardiac medical device is anchored to a ventricular wall, transmitter elements of the communications modules are only activated for communication during a detected period of reduced ventricular wall motion. The period of reduced ventricular wall motion may be defined as at least one time interval during which an axis of the directional antenna does not rotate out from a baseline orientation by more than 15 degrees. The communication may be conducted with an external programmer-type device, or with another implanted device, for example, located remote from the heart.

Controlling wireless communication in an implanted cardiac device

Techniques for determining an attachment stability of leadless pacing device (LPD) implanted within a patient are described. For example, the LPD may detect one or more stability metrics from one or more electrodes of the LPD and/or an activity sensor within the LPD. Based on one or more of these stability metrics, e.g., a mechanical motion of the LPD, a stability module within the LPD may determine the attachment stability of the LPD within the patient. If the attachment stability is insufficient to provide efficacious therapy or indicates at least partial dislodgement of the LPD from tissue, the LPD may wirelessly transmit stability information to an external device. In some examples, the LPD may be implanted within a chamber of the heart.

IMD stability monitor

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St. Cloud, MN, United States of America

Michael Andrew Reinert