Recovery of cardiac event sensing and rhythm detection following electrical stimulation pulse delivery

A medical device comprising:

• a therapy delivery module configured to generate and deliver an electrical shock to a patient's heart via a plurality of electrodes coupled to the medical device;
• a sensing module configured to receive a cardiac electrical signal and produce cardiac event signals in response to the cardiac electrical signal crossing a cardiac event sensing threshold;
• and
• a control module coupled to the sensing module and the therapy delivery module and configured to receive the cardiac event signals from the sensing module and control the therapy delivery module to deliver the electrical shock, the control module configured to determine a pre-shock cardiac event amplitude prior to delivery of the electrical shock,
• the sensing module further configured to adjust a cardiac event sensing threshold in response to delivery of the electrical shock by the therapy delivery module and according to a post-shock decay sequence, the post-shock decay sequence controlled by a set of sensing control parameters comprising at least one sensing control parameter based on the pre-shock cardiac event amplitude, and wherein to adjust the cardiac event sensing threshold according to the post-shock decay sequence, the sensing module is configured to adjust the cardiac event sensing threshold to decay at a post-shock sequence decay rate, wherein the post-shock sequence decay rate is based on the pre-shock cardiac event amplitude.

A non-transitory, computer-readable medium storing a set of instructions which, when executed by a control module of a medical device, cause the medical device to:

• deliver an electrical shock to a heart of a patient via a plurality of electrodes coupled to the medical device;
• determine a pre-shock cardiac event amplitude prior to delivering the electrical shock;
• and
• adjust a cardiac event sensing threshold in response to the electrical shock delivery and according to a post-shock decay sequence, the post-shock decay sequence controlled by a set of sensing control parameters comprising at least one sensing control parameter based on the pre-shock cardiac event amplitude, and wherein to adjust the cardiac event sensing threshold, the instructions cause the medical device to adjust the cardiac event sensing threshold to decay at a post-shock sequence decay rate, wherein the post-shock sequence decay rate is based on the pre-shock cardiac event amplitude.