# US 12,758,782 B2 · Implantable medical device configured to provide an intracardiac function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,758,782 B2 - Document ID: US12758782B2 - Status: Granted - Kind: B2 - Application number: 18/557,078 - Filed: 2022-04-26 - Published: 2024-06-27 - Granted: 2026-10-13 - Earliest claimed: 2021-05-05 - Assignees: I BIOTRONIK SE & Co. KG - Applicants: BIOTRONIK SE & Co. KG - Inventors: Daniel Young; Madeline Anne Midgett; Christopher Jones; R. Hollis Whittington - Web page: https://patentgrep.com/patent/US12758782B2 ## CPC - A61N 1/365: controlled by a physiological parameter, e.g. heart potential {(evoked response A61N1/371)} - A61N 1/37512: {Pacemakers} - A61N 1/3756: {Casings with electrodes thereon, e.g. leadless stimulators} - A61N 1/0573: {chacterised by means penetrating the heart tissue, e.g. helix needle or hook} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract An implantable medical device configured to provide for an intracardiac function comprises a body, a sensor arrangement arranged on the body and configured to receive a cardiac sense signal, and a processing circuitry operatively connected to the sensor arrangement. The processing circuitry is configured to process the cardiac sense signal received using the sensor arrangement to monitor the cardiac sense signal to detect whether a start criterion is fulfilled, wherein the start criterion is fulfilled if at least one signal sample (s(i−3) . . . s(i+3)) of the cardiac sense signal is smaller than a start threshold, and to start an atrial detection window for detecting, within the atrial detection window, a signal deflection of the cardiac sense signal potentially indicative of an atrial event, based on whether the detection criterion is fulfilled. ## Claims ### Claim 1 A leadless pacemaker device configured to provide for an intracardiac function, the implantable medical device comprising: a body formed by a housing of the leadless pacemaker device; a sensor arrangement arranged on the body and configured to receive a cardiac sense signal; and a processing circuitry operatively connected to the sensor arrangement, wherein the processing circuitry is configured to process the cardiac sense signal received using the sensor arrangement: to monitor the cardiac sense signal to detect whether a start criterion is fulfilled, wherein the start criterion is fulfilled if at least one signal sample (s(i−3) . . . s(i+3)) of the cardiac sense signal is smaller than a start threshold; and to start an atrial detection window for detecting, within the atrial detection window, a signal deflection of the cardiac sense signal indicative of an atrial event, based on whether said start criterion is fulfilled; wherein the processing circuitry is configured to detect the signal deflection in the cardiac sense signal indicative of an atrial event based on a comparison of the cardiac sense signal to a sense threshold in the atrial detection window, wherein the processing circuitry is configured to adjust a pacing function of the leadless pacemaker device based on the detected signal deflection. ### Claim 2 (depends on 1) The leadless pacemaker device according to claim 1, wherein the start criterion is fulfilled if a predefined multiplicity of signal samples (s(i−3) . . . s(i+3)) of the cardiac sense signal is smaller than the start threshold. ### Claim 3 (depends on 1) The leadless pacemaker device according to claim 1, wherein the start criterion is fulfilled if a predefined multiplicity of consecutive signal samples (s(i−3) . . . s(i+3)) of the cardiac sense signal is smaller than the start threshold. ### Claim 4 (depends on 2) The leadless pacemaker device according to claim 2, wherein the predefined multiplicity of signal samples (s(i−3) . . . s(i+3)) lies in a range between 1 and 20. ### Claim 5 (depends on 1) The leadless pacemaker device according to claim 1, wherein the processing circuitry is configured to start the atrial detection window at the time of detection that the start criterion is fulfilled. ### Claim 6 (depends on 1) The leadless pacemaker device according to claim 1, wherein the processing circuitry is configured to blank a portion of said cardiac sense signal in a blanking window and to start monitoring the cardiac sense signal to detect whether the start criterion is fulfilled after the end of the blanking window. ### Claim 7 (depends on 1) The leadless pacemaker device according to claim 1, wherein the processing circuitry is configured to monitor the cardiac sense signal in a first processing state before the start criterion is fulfilled. ### Claim 8 (depends on 1) The leadless pacemaker device according to claim 1, wherein the processing circuitry is configured to monitor the cardiac sense signal in a second processing state within the atrial detection window for detecting the signal deflection of the cardiac sense signal indicative of an atrial event. ### Claim 9 (depends on 1) The leadless pacemaker device according to claim 1, wherein the start threshold is equal to the sense threshold. ### Claim 10 (depends on 1) The leadless pacemaker device according to claim 1, wherein the processing circuitry is configured, if the signal deflection indicative of an atrial event is detected, to determine a peak amplitude associated with the atrial event. ### Claim 11 (depends on 10) The leadless pacemaker device according to claim 10, wherein the processing circuitry is configured to determine the peak amplitude associated with the atrial event in a peak detection window following the atrial event (As). ### Claim 12 (depends on 1) The leadless pacemaker device according to claim 1, wherein the processing circuitry comprises a first processing channel having a first gain for processing a first processing signal derived from cardiac sense signals received via the sensor arrangement and a second processing channel having a second gain for processing a second processing signal derived from cardiac sense signals received via the sensor arrangement, the second gain being higher than the first gain. ### Claim 13 Method for operating a leadless pacemaker device for providing for an intracardiac function, comprising: receiving, using a sensor arrangement arranged on a body of the implantable medical device, a cardiac sense signal; processing, using a processing circuitry operatively connected to the sensor arrangement, the cardiac sense signal received using the sensor arrangement: to monitor the cardiac sense signal to detect whether a start criterion is fulfilled, wherein the start criterion is fulfilled if at least one signal sample (s(i−3) . . . s(i+3)) of the cardiac sense signal is smaller than a start threshold; and to start an atrial detection window for detecting, within the atrial detection window, a signal deflection of the cardiac sense signal indicative of an atrial event, based on whether said start criterion is fulfilled, detecting the signal deflection in the cardiac sense signal indicative of an atrial event based on a comparison of the cardiac sense signal to a sense threshold in the atrial detection window, and adjusting a pacing function of the leadless pacemaker device based on the detected signal deflection.