Mitigating false messages and effects thereof in multi-chamber leadless pacemaker systems and other IMD systems
AssigneePacesetter, Inc.
InventorsDonald Chin, Matthew G. Fishler, Benjamin T. Persson, Suresh Gurunathan
Life of this patent
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Abstract
Implantable medical devices (IMDs) described herein, and methods for use therewith described herein, reduce how often an IMD accepts a false message and/or reduce adverse effects of an IMD accepting a false message. Such IMDs can be leadless pacemakers (LPs), or implantable cardio defibrillators (ICDs), but are not limited thereto. Such embodiments can be used help multiple IMDs (e.g., multiple LPs) implanted within a same patient maintain synchronous operation, such as synchronous multi-chamber pacing.
Claims26
A method for use by a leadless pacemaker (LP) implanted in or on a first cardiac chamber of a patient also having an implantable medical device (IMD) remotely located relative to the LP, the method comprising:
- the LP performing pacing of the first cardiac chamber at a pacing rate;
- the LP monitoring for one or more implant-to-implant (i2i) messages transmitted by the IMD remotely located relative to the LP;
- the LP decoding a said i2i message, received by the LP, to determine a pacing rate indicator that specifies a new pacing rate at which the LP is to perform pacing of the first cardiac chamber;
- the LP determining whether an adjustment to the pacing rate of the first cardiac chamber to match the new pacing rate specified by the pacing rate indicator would cause the adjustment to exceed a rate adjustment threshold, wherein the adjustment is equal to a difference between the pacing rate and the new pacing rate, and wherein the rate adjustment threshold limits how large the adjustment can be in response to the LP receiving the said i2i message;
- and
- the LP, in response to determining that the adjustment to the pacing rate of the first cardiac chamber to match the new pacing rate specified by the pacing rate indicator would cause the adjustment to exceed the rate adjustment threshold, adjusting the pacing rate to a further new pacing rate by limiting the adjustment to a specified amount.
An implantable leadless pacemaker (LP) configured to be implanted in or on a first cardiac chamber of a patient, the LP comprising:
- at least one receiver configured to receive one or more implant-to-implant (i2i) messages from an implantable medical device (IMD) remotely located relative to the LP;
- and
- a controller configured to:
- decode a said i2i message, received by the LP, to determine a pacing rate indicator that specifies a new pacing rate at which the LP is to perform pacing of the first cardiac chamber;
- determine whether an adjustment to the pacing rate of the first cardiac chamber to match the new pacing rate specified by the pacing rate indicator would cause the adjustment to exceed a rate adjustment threshold, wherein the adjustment is equal to a difference between the pacing rate and the new pacing rate, and wherein the rate adjustment threshold limits how large the adjustment can be in response to the LP receiving the said i2i message;
- and
- in response to determining that the adjustment to the pacing rate of the first cardiac chamber to match the new pacing rate specified by the pacing rate indicator would cause the adjustment to exceed the rate adjustment threshold, adjust the pacing rate to a further new pacing rate that limits the adjustment to a specified amount.
Dependencies are inferred from the claim text.