Patents by Inventor Todd J. Sheldon

Todd J. Sheldon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220288387
    Abstract: A medical device is configured to sense a cardiac electrical signal and detect an atrial tachyarrhythmia based on the sensed cardiac electrical signal. The medical device is configured to determine that far field oversensing criteria are met by the cardiac electrical signal during the detected atrial tachyarrhythmia. The medical device may detect termination of the detected atrial tachyarrhythmia in response to the far field oversensing criteria being met.
    Type: Application
    Filed: February 10, 2022
    Publication date: September 15, 2022
    Inventors: Saul E. GREENHUT, Mark L. BROWN, Vincent P. GANION, Yanina GRINBERG, Troy E. JACKSON, Todd J. SHELDON, Shravya SRIGIRI, Paul R. SOLHEIM
  • Publication number: 20220288397
    Abstract: An intracardiac ventricular pacemaker having a motion sensor is configured to produce a motion signal including an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase, set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after an expected time interval of the ventricular diastolic event. The pacemaker is configured to detect the atrial systolic event in response to the motion signal crossing the detection threshold and set an atrioventricular pacing interval in response to detecting the atrial systolic event.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 15, 2022
    Inventors: Vincent E. SPLETT, Todd J. SHELDON, Yong K. CHO, Wade M. DEMMER, Mark K. ERICKSON
  • Publication number: 20220280368
    Abstract: Disclosed is a dual-receptacle carrier that is generally configured for attachment to a rollator or walker and that is configured to retain either a beverage or a mobile device, such as a cellular telephone. The device comprises a body, a base, and first and second opposing retention arm portions that are configured as a receptacle for a beverage. The first and second opposing retention arm portions and base include recesses that define a receptacle for an electronic device.
    Type: Application
    Filed: May 18, 2022
    Publication date: September 8, 2022
    Inventors: Todd Brockway, Emily Berman, Caren Wax, Tambra Martin, William Elliott Brooks, Robert W. Sheldon, Gregory J. Foster
  • Patent number: 11420067
    Abstract: A medical device includes a motion sensor for producing a motion signal including cardiac event signals. The medical device generates a ventricular pacing pulse upon expiration of a pacing interval. The medical device determines a synchrony metric from the motion signal after a delivered ventricular pacing pulse and adjusts the pacing interval based on the synchrony metric.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: August 23, 2022
    Assignee: Medtronic, Inc.
    Inventors: Wade M. Demmer, Alexander R. Mattson, Todd J. Sheldon, Zhongping Yang
  • Patent number: 11389100
    Abstract: The control module of a first pacemaker included in an implantable medical device system including the first pacemaker and a second pacemaker is configured to set a pacing escape interval in response to a far field pacing pulse sensed by the first pacemaker. The far field pacing pulse is a pacing pulse delivered by the second pacemaker. The pacing escape interval is allowed to continue without restarting the in response to a far field intrinsic event sensed by the first pacemaker during the pacing escape interval. The first pacemaker delivers a cardiac pacing pulse to the heart upon expiration of the pacing escape interval.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: July 19, 2022
    Assignee: Medtronic, Inc.
    Inventors: Wade M. Demmer, Todd J. Sheldon, Saul E. Greenhut, James D. Reinke
  • Patent number: 11369798
    Abstract: An implantable medical device system includes an extracardiac sensing device and an intracardiac pacemaker. The sensing device senses a P-wave attendant to an atrial depolarization of the heart via housing-based electrodes carried by the sensing device when the sensing device is implanted outside the cardiovascular system and sends a trigger signal to the intracardiac pacemaker in response to sensing the P-wave. The intracardiac pacemaker detects the trigger signal and schedules a ventricular pacing pulse in response to the detected trigger signal.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: June 28, 2022
    Assignee: Medtronic, Inc.
    Inventors: Jian Cao, Paul J. Degroot, Todd J. Sheldon
  • Patent number: 11357987
    Abstract: An intracardiac ventricular pacemaker having a motion sensor is configured to produce a motion signal including an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase, set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after an expected time interval of the ventricular diastolic event. The pacemaker is configured to detect the atrial systolic event in response to the motion signal crossing the detection threshold and set an atrioventricular pacing interval in response to detecting the atrial systolic event.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: June 14, 2022
    Assignee: Medtronic, Inc.
    Inventors: Vincent E. Splett, Todd J. Sheldon, Yong K. Cho, Wade M. Demmer, Mark K. Erickson
  • Publication number: 20220176127
    Abstract: A pacemaker is configured to operate in an atrial synchronous ventricular pacing mode and, after expiration of a conduction check time interval, switch to an asynchronous ventricular pacing mode that includes setting a ventricular pacing interval to a base pacing rate interval. The pacemaker is further configured to determine when atrioventricular block detection criteria are satisfied during the asynchronous ventricular pacing mode and, responsive to the atrioventricular block detection criteria being satisfied, switch back to the atrial synchronous ventricular pacing mode.
    Type: Application
    Filed: February 25, 2022
    Publication date: June 9, 2022
    Inventors: Juliana E. PRONOVICI, James W. BUSACKER, Keelia M. ESCALANTE, Vincent P. GANION, Greggory R. HERR, Todd J. SHELDON, Vincent E. SPLETT
  • Publication number: 20220168578
    Abstract: Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.
    Type: Application
    Filed: February 18, 2022
    Publication date: June 2, 2022
    Inventors: Hyun J. Yoon, Wade M. Demmer, Matthew J. Hoffman, Robert A. Betzold, Jonathan D. Edmonson, Michael L. Ellingson, Mark K. Erickson, Ben W. Herberg, Juliana E. Pronovici, James D. Reinke, Todd J. Sheldon, Paul R. Solheim
  • Patent number: 11305126
    Abstract: An intracardiac ventricular pacemaker is configured to detect a ventricular diastolic event from a motion signal received by a pacemaker control circuit from a motion sensor. The control circuit starts an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event. The control circuit detects an atrial systolic event from the motion signal after expiration of the atrial refractory period and controls a pulse generator of the pacemaker to deliver a pacing pulse to a ventricle of a patient's heart at a first atrioventricular pacing time interval after the atrial systolic event detection.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: April 19, 2022
    Assignee: Medtronic, Inc.
    Inventors: Vincent E. Splett, Todd J. Sheldon, Yong K. Cho, Wade M. Demmer, Mark K. Erickson
  • Publication number: 20220096837
    Abstract: An intracardiac ventricular pacemaker having a motion sensor, a pulse generator and a control circuit coupled to the pulse generator and the motion sensor is configured to identify a ventricular systolic event, detect a ventricular passive filling event signal from the motion signal, and determine a time interval from the ventricular systolic event to the ventricular passive filling event. The pacemaker establishes a minimum pacing interval based on the time interval.
    Type: Application
    Filed: November 19, 2021
    Publication date: March 31, 2022
    Inventors: Wade M. DEMMER, Juliana E. PRONOVICI, Todd J. SHELDON
  • Publication number: 20220088393
    Abstract: A medical device is configured to produce a cardiac motion signal by sampling a signal produced by an axis of a motion sensor, starting a blanking period, suspending the sampling of the signal during at least a portion of the blanking period, and restarting the sampling of the signal at the sampling frequency before the blanking period has expired. The medical device may detect a cardiac event from the cardiac motion signal and generate a pacing pulse in response to detecting the cardiac event in some examples.
    Type: Application
    Filed: December 3, 2021
    Publication date: March 24, 2022
    Inventors: Todd J. SHELDON, Vincent P. GANION, Greggory R. HERR, Michael L. HUDZIAK, Juliana E. PRONOVICI, Paul R. SOLHEIM
  • Publication number: 20220080210
    Abstract: A medical device is configured to receive a cardiac signal and determine a morphology matching score from the cardiac signal and a capture detection morphology template that corresponds to a first type of cardiac pacing capture that includes capture of at least a first portion of the His-Purkinje system. The device is configured to detect a second type of cardiac pacing capture in response to the morphology matching score being less than the first match threshold. The second type of cardiac pacing capture is different than the first type of cardiac pacing capture and may include capture of the ventricular myocardium and/or a second portion of the His-Purkinje system different than the first portion.
    Type: Application
    Filed: November 22, 2021
    Publication date: March 17, 2022
    Inventors: Jian CAO, Wade M. DEMMER, Elizabeth A. MATTSON, Todd J. SHELDON, Xiaohong ZHOU
  • Publication number: 20220072316
    Abstract: A medical device is configured to generate an acceleration signal and a temperature signal. The device is configured to determine an activity metric from the acceleration signal that is representative of patient physical activity. In response to determining that the activity metric is equal to or greater than a previously determined activity metric, the device is configured to adjust a target cardiac pacing rate based at least on a temperature change determined from the temperature signal. The device may include a pulse generator for generating cardiac pacing pulses based on the target cardiac pacing rate.
    Type: Application
    Filed: August 17, 2021
    Publication date: March 10, 2022
    Inventors: Hyun J. YOON, Vincent P. GANION, Yanina GRINBERG, Saul E. GREENHUT, Todd J. SHELDON, Paul R. Solheim, Eric R. WILLIAMS
  • Publication number: 20220062646
    Abstract: A medical device is configured to sense a cardiac signal, determine a monitoring metric representative of activity of at least one heart chamber from the sensed cardiac signal, and determine that the monitoring metric meets expected rhythm criteria. The medical device may enable a monitoring feature of the medical device that is based on processing and analysis of the cardiac signal in response to the monitoring metric meeting the expected rhythm criteria.
    Type: Application
    Filed: August 3, 2021
    Publication date: March 3, 2022
    Inventors: Michelle M. GALARNEAU, Saul E. GREENHUT, Yanina GRINBERG, Todd J. SHELDON
  • Publication number: 20220062645
    Abstract: This disclosure is directed to devices and techniques for classifying of pacing captures to evaluate effectiveness of pacing by a pacing device, such as an implantable medical device (IMD). An example system includes stimulation circuitry to generate a pacing stimulus, sensing circuitry to sense an evoked response after the pacing stimulus, and processing circuitry. The processing circuitry determines classification features from the evoked response and applies the classification features to a classification model, the classification model generated by a machine learning algorithm using one or more test sets comprising a plurality of sample evoked responses for each of a plurality of classifications. Based on the output of the model, the processing circuitry classifies the evoke response as one of the plurality of classifications.
    Type: Application
    Filed: August 12, 2021
    Publication date: March 3, 2022
    Inventors: Jian Cao, Elizabeth A. Mattson, Todd J. Sheldon, Xiaohong Zhou, Wade M. Demmer
  • Patent number: 11260234
    Abstract: A pacemaker is configured to operate in an atrial synchronous ventricular pacing mode and, after expiration of a conduction check time interval, switch to an asynchronous ventricular pacing mode that includes setting a ventricular pacing interval to a base pacing rate interval. The pacemaker is further configured to determine when atrioventricular block detection criteria are satisfied during the asynchronous ventricular pacing mode and, responsive to the atrioventricular block detection criteria being satisfied, switch back to the atrial synchronous ventricular pacing mode.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: March 1, 2022
    Assignee: Medtronic, Inc.
    Inventors: Juliana E. Pronovici, James W. Busacker, Keelia Doyle, Vincent P. Ganion, Greggory R. Herr, Todd J. Sheldon, Vincent E. Splett
  • Patent number: 11253707
    Abstract: Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: February 22, 2022
    Assignee: Medtronic, Inc.
    Inventors: Hyun J. Yoon, Wade M. Demmer, Matthew J. Hoffman, Robert A. Betzold, Jonathan D. Edmonson, Michael L. Ellingson, Mark K. Erickson, Ben W. Herberg, Juliana E. Pronovici, James D. Reinke, Todd J. Sheldon, Paul R. Solheim
  • Patent number: 11229795
    Abstract: Cardiac resynchronization therapy (CRT) delivered to a heart of a patient may be adjusted based on detection of a surrogate indication of the intrinsic atrioventricular conduction of the heart. In some examples, the surrogate indication is determined to be a sense event of the first depolarizing ventricle of the heart within a predetermined period of time following the delivery of a fusion pacing stimulus to the later depolarizing ventricle. In some examples, the CRT is switched from a fusion pacing configuration to a biventricular pacing configuration if the surrogate indication is not detected, and the CRT is maintained in a fusion pacing configuration if the surrogate indication is detected.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: January 25, 2022
    Assignee: Medtronic, Inc.
    Inventors: Aleksandre Sambelashvili, Thomas J. Mullen, Todd J. Sheldon
  • Publication number: 20210401350
    Abstract: An implantable medical device is configured to determine a first atrial arrhythmia score from ventricular events sensed by a sensing circuit of an implantable medical device and determine a second atrial arrhythmia score from an intraventricular signal comprising atrial mechanical event signals attendant to atrial systole and produced by a sensor of the implantable medical device. An atrial arrhythmia is detected based on the first atrial arrhythmia score and the second atrial arrhythmia score.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Inventors: Shantanu SARKAR, Wade M. DEMMER, Todd J. SHELDON, Vincent E. SPLETT