Measuring Pacing, Threshold, Capture Margin, Or Contact Impedance Patents (Class 607/28)
  • Patent number: 10596381
    Abstract: An implantable or other ambulatory medical apparatus comprises a posture sensing circuit, a physiologic sensing circuit that senses a time varying physiologic signal, and a processor circuit. The processor circuit includes a posture calculation circuit and a measurement circuit. The posture calculation circuit determines a posture of the subject using posture data obtained using the posture signal and determines when the posture of the subject is steady state. The measurement circuit derives a physiologic measurement using physiologic data extracted from the physiologic signal during at least one time period when posture is determined to be steady state and provides the physiologic measurement to at least one of a user and a process in association with the determined steady state posture.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: March 24, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Viktoria A. Averina, John D. Hatlestad, Abhilash Patangay, Pramodsingh Hirasingh Thakur, Yi Zhang, Kenneth C. Beck
  • Patent number: 10575346
    Abstract: A method, system and external instrument are provided. The method initiates a communication link between an external instrument (EI) and an implantable medical device (MD), established a first connection interval for conveying data packets between the EI and IMD and monitors a connection criteria that includes at least one of a data throughput requirement. A battery indicator or link condition of the communications link is between the IMD and EI. The method further changes from the first connection interval to a second connection interval based on the connection criteria.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: February 25, 2020
    Assignee: PACESETTER, INC.
    Inventors: Yongjian Wu, Chao-Wen Young, Jun Yang, Xing Pei, Reza Shahandeh
  • Patent number: 10561326
    Abstract: Physiological monitoring can be provided through a lightweight wearable monitor that includes two components, a flexible extended wear electrode patch and a reusable monitor recorder that removably snaps into a receptacle on the electrode patch. The wearable monitor sits centrally (in the midline) on the patient's chest along the sternum oriented top-to-bottom. The placement of the wearable monitor in a location at the sternal midline, with its unique narrow “hourglass”-like shape, significantly improves the ability of the wearable monitor to cutaneously sense cardiac electrical potential signals, particularly the P-wave and, to a lesser extent, the QRS interval signals indicating ventricular activity in the ECG waveforms. Additionally, the monitor recorder includes an ECG sensing circuit that measures raw cutaneous electrical signals and performs signal processing prior to outputting the processed signals for sampling and storage.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: February 18, 2020
    Assignee: BARDY DIAGNOSTICS, INC.
    Inventors: Jason Felix, Jon Mikalson Bishay, Gust H. Bardy
  • Patent number: 10525270
    Abstract: According to some methods, for example, preprogrammed in a microprocessor element of an implantable cardiac pacing system, at least one of a number of periodic pacing threshold searches includes steps to reduce an evoked response amplitude threshold for evoked response signal detection. The reduction may be to a minimum value measurable above zero, for example, as determined by establishing a ‘noise floor’. Alternately, amplitudes of test pacing pulses and corresponding post pulse signals are collected and reviewed to search for a break, to determine a lower value to which the evoked response threshold may be adjusted without detecting noise. Subsequent to reducing the threshold, if no evoked response signal is detected for a test pulse applied at or above a predetermined maximum desirable pulse energy, an operational pacing pulse energy is set to greater than or equal to the maximum desirable in conjunction with a reduction in pacing rate.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: January 7, 2020
    Assignee: Medtronic, Inc.
    Inventors: Todd J Sheldon, Wade M Demmer
  • Patent number: 10512784
    Abstract: Systems, methods and implantable devices configured to provide cardiac resynchronization therapy and/or bradycardia pacing therapy. A first device located in the heart of the patient is configured to receive a communication from a second device and deliver a pacing therapy in response to or in accordance with the received communication. A second device located elsewhere is configured to determine an atrial event has occurred and communicate to the first device to trigger the pacing therapy. The second device may be configured for sensing the atrial event by the use of vector selection and atrial event windowing, among other enhancements. Exception cases are discussed and handled as well.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: December 24, 2019
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Stephen J. Hahn, Krzysztof Z. Siejko, William J. Linder, Keith R. Maile, Amy Jean Brisben, Keith L. Herrmann, Brendan E. Koop, Benjamin J. Haasl
  • Patent number: 10493286
    Abstract: An implantable medical device (IMD) automatically determines at least a portion of the parameters and, in some instances all of the parameters, of an exposure operating mode based on stored information regarding sensed physiological events or therapy provided over a predetermined period of time. The IMD may configure itself to operate in accordance with the automatically determined parameters of the exposure operating mode in response to detecting a disruptive energy field. Alternatively, the IMD may provide the automatically determined parameters of the exposure operating mode to a physician as suggested or recommended parameters for the exposure operating mode. In other instances, the automatically determined parameters may be compared to parameters received manually via telemetry and, if differences exist or occur, a physician or patient may be notified and/or the manual parameters may be overridden by the automatically determined parameters.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: December 3, 2019
    Assignee: Medtronic, Inc.
    Inventors: Michael L. Ellingson, Hyun J. Yoon
  • Patent number: 10441789
    Abstract: The present invention relates to an interface means, especially an interface means for a medical device, comprising at least one or more lines, whereby the lines are configured such that each line has at least one specific functionality and/or is able to connect a first connection means with a second connection means, and at least one grouping and/or redistributing means, wherein the at least one grouping and/or redistributing means is configured such that the lines can be grouped and/or redistributed onto one or more lines and/or the functionality of lines can be grouped and/or redistributed onto one or more lines, preferably onto at least one single line. Furthermore, the present invention relates to a method for communicating a plurality of signals, in particular power and/or data signals and/or control signals, over a plurality of lines.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: October 15, 2019
    Assignee: Medtronic Bakken Research Center, B.V.
    Inventor: Jeroen Jacob Arnold Tol
  • Patent number: 10434314
    Abstract: A medical system may include a first medical device such as a leadless cardiac pacemaker (LCP) that is configured to pace a patient's heart and a second medical device that is configured to have a capture threshold capability. The second medical device may monitor the patient's heart to ascertain whether the pacing pulses from the first medical device are capturing the heart, and to send the first medical device instructions to alter an energy level of subsequent pacing pulses.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: October 8, 2019
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Jacob M. Ludwig, Keith R. Maile
  • Patent number: 10426962
    Abstract: Methods, devices, and systems for performing pacing capture verification in implantable medical devices such as a leadless cardiac pacemakers using a pressure signal. An example medical device includes a pressure sensor and is configured to monitor for an evoked capture response using the pressure sensor following pace delivery. Various factors of the pressure waveform may be used including the use of threshold, templating, and slope, as well as comparing cross-domain sensed events including using a fiducial point from the pressure signal for comparison to an acoustic, electrical, or motion event, or the use of data obtained from a second device which may be implanted, wearable, or external to the patient.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: October 1, 2019
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Qi An, Jeffrey E. Stahmann, Pramodsingh Hirasingh Thakur, Yinghong Yu, Michael J. Kane
  • Patent number: 10429395
    Abstract: Disclosed are methods, apparatuses, etc. for glucose sensor signal stability analysis. In certain example embodiments, a series of samples of at least one sensor signal that is responsive to a blood glucose level of a patient may be obtained. Based at least partly on the series of samples, at least one metric may be determined to assess an underlying trend of a change in responsiveness of the at least one sensor signal to the blood glucose level of the patient over time. A reliability of the at least one sensor signal to respond to the blood glucose level of the patient may be assessed based at least partly on the at least one metric assessing the underlying trend. Other example embodiments are disclosed herein.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: October 1, 2019
    Assignee: Medtronic Minimed, Inc.
    Inventors: Ying Luo, Rebecca K. Gottlieb, Meena Ramachandran, Chia-Hung Chiu, Nandita Dangui-Patel, Michael Kremliovsky, Jefferson Rose
  • Patent number: 10420945
    Abstract: According to some embodiments, a device operates by comparative morphological analysis of depolarization signals collected in spontaneous rhythm on separate respective channels, with two temporal components combined into a single 2D parametric VGM vectogram characteristic. Similarity quantification methods evaluate a variation over time of a descriptor parameter of a current VGM compared to a stored previous reference VGM. This variation is compared with predetermined thresholds to diagnose an occurrence of remodeling or reverse remodeling in a patient, and/or to detect a lead failure or an occurrence of ischemia. The descriptor parameter is a function of a velocity vector of the VGM, a comparison relating to a correlation coefficient between respective magnitudes of a current VGM velocity vector and of a reference VGM velocity vector, and an average angle between these respective velocity vectors.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: September 24, 2019
    Assignee: Sorin CRM SAS
    Inventors: Paola Milpied, Marie-Anne Euzen
  • Patent number: 10413734
    Abstract: A cardiac stimulation system and associated capture management method are provided in which capture and device longevity are improved. The device determines a series of capture thresholds. Capture threshold is the minimum pulse level (pulse energy or pulse amplitude or pulse width) that captures the heart. Each determination requires delivery of pacing pulses at several (at least two) known levels (pulse energy, pulse amplitude and/or pulse width) over time. The individual determined capture thresholds are combined into a set and the variability of the set is used to set the safety margin. The greater the variability in the capture thresholds, the bigger the safety margin.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: September 17, 2019
    Assignee: Medtronic, Inc.
    Inventors: Eric A Shilling, Karen J Kleckner
  • Patent number: 10384066
    Abstract: A non-invasive bodily-attached ambulatory medical monitoring and treatment device with pacing is provided. The device includes at least one therapy electrode; a memory storing information indicative of a patient's cardiac activity; circuitry for implementing a plurality of pacing routines, each pacing routine of the plurality of pacing routines corresponding to at least one cardiac condition of a plurality of cardiac conditions; and at least one processor coupled to the circuitry and configured to identify, within the information, at least one cardiac condition of the plurality of cardiac conditions; and respond to the identified cardiac condition in part by causing execution of at least one pacing routine corresponding to the identified cardiac condition.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: August 20, 2019
    Assignee: ZOLL MEDICAL CORPORATION
    Inventors: Jason T. Whiting, Thomas E. Kaib, Rachel H. Carlson, Gregory R. Frank
  • Patent number: 10350411
    Abstract: Devices, systems and methods for treating medical disorders, such as migraine or other primary headaches, or fibromyalgia, by noninvasive electrical stimulation of a vagus nerve, used in conjunction with the measurement of evoked potentials (EPs). The system comprises a stimulator that is applied to the surface of the patient's neck to apply electrical impulses sufficient to stimulate a cervical vagus nerve, scalp electrodes that are used to measure EPs that are evoked by that stimulation, feedback or biofeedback circuits to vary the stimulation based upon EP characteristics, and other sensory stimulation modalities that produce EPs. The system is preferably used to optimize the placement of the stimulator, to test whether a patient is a suitable candidate for treatment using vagus nerve stimulation, and to select the stimulation parameters that optimized acute or chronic treatment, e.g., by correcting an EP habituation deficit.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: July 16, 2019
    Assignee: Electrocore, Inc.
    Inventors: Bruce J. Simon, Joseph P. Errico
  • Patent number: 10278217
    Abstract: A method, system and external instrument are provided. The method initiates a communication link between an external instrument (EI) and an implantable medical device (IMD), established a first connection interval for conveying data packets between the EI and IMD and monitors a connection criteria that includes at least one of a data throughput requirement. A battery indicator or link condition of the communications link is between the IMD and EI. The method further changes from the first connection interval to a second connection interval based on the connection criteria.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: April 30, 2019
    Assignee: Pacesetter, Inc.
    Inventors: Yongjian Wu, Chao-Wen Young, Jun Yang, Xing Pei, Reza Shahandeh
  • Patent number: 10183169
    Abstract: Systems and methods may facilitate selection of a vector for delivering electrical stimulation to a patient's heart. One illustrative method may include delivering electrical stimulation at a first voltage to each vector in a first set of two or more vectors of a multi-vector medical system, determining whether the delivered electrical stimulation at the first voltage resulted in capture for each of the vectors in the first set of two or more vectors, identifying those vectors of the first set of two or more vectors that were determined to result in capture as a second set of vectors, delivering electrical stimulation at a second voltage that is lower than the first voltage to each vector in the second set of vectors, and determining whether the delivered electrical stimulation at the second voltage resulted in capture for each of the vectors in the second set of vectors.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 22, 2019
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Holly E. Rockweiler, Sunipa Saha, Keith L. Herrmann, Yinghong Yu, Joel A. Krueger
  • Patent number: 10159847
    Abstract: An implantable medical device includes a housing, a power source and an operational circuit that is coupled to the power source. The operational circuit includes a first electrode terminal and a second electrode terminal, an output circuit configured to deliver an electrical stimulation therapy through the first and second electrode terminals and a control circuit configured to evaluate an electrical parameter associated with the output circuit and to control generation of the electrical stimulation therapy responsive to a result of the evaluated parameter. Among other things, the implantable medical device may modify a parameter of the therapy delivery in response to a result of the evaluation.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: December 25, 2018
    Assignee: Medtronic, Inc.
    Inventors: Marshall J. Rasmussen, Lonny V. Cabelka, Randolph E. Crutchfield, Jon E. Zimmer
  • Patent number: 10124174
    Abstract: An example of a system includes an implantable medical device (IMD) for implantation in a patient, where the IMD includes a cardiac pace generator, phrenic nerve stimulation (PS) sensor, a memory, and a controller, and where the controller is operably connected to the cardiac pace generator to generate cardiac paces. The controller is configured to provide a trigger for conducting a PS detection procedure and perform the PS detection procedure in response to the trigger. In performing the PS detection procedure the controller is configured to receive a signal from the sensor, detect PS using the signal from the sensor, and record the PS detection in storage within the IMD.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: November 13, 2018
    Assignee: Cardiac Pacemakes, Inc.
    Inventors: Holly Rockweiler, Sunipa Saha, Aaron R. McCabe, Krzysztof Z. Siejko
  • Patent number: 10118042
    Abstract: A method includes sensing a cardiac electrogram (EGM) signal of a patient via one or more electrodes on at least one implantable medical lead. An asystolic EGM signal is detected from the patient, and a lead integrity test of the at least one implantable medical lead is initiated in response to the asystolic EGM signal.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: November 6, 2018
    Assignee: Medtronic, Inc.
    Inventors: Bruce D. Gunderson, William J. Havel
  • Patent number: 10064567
    Abstract: Systems, methods, and graphical user interfaces are described herein for identification of optimal electrical vectors for use in assisting a user in implantation of implantable electrodes to be used in cardiac therapy. Cardiac improvement information may be generated for each pacing configuration, and one or more pacing configuration may be selected based on the cardiac improvement information. Optimal electrical vectors using the selected pacing configurations may be identified using longevity information generated for each electrical vector. Electrodes may then be implanted for use in cardiac therapy to form the optimal electrical vector.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: September 4, 2018
    Assignee: MEDTRONIC, INC.
    Inventors: Subham Ghosh, Jeffrey Gillberg, Manfred Justen, Eric Schilling
  • Patent number: 9913986
    Abstract: A particular implantable device includes one or more electrode connectors and multiple circuit elements within a housing. The implantable medical device may also include one or more switches, where each switch of the one or more switches is coupled between one or more of the multiple circuit elements and at least one electrode connector of the one or more electrode connectors.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: March 13, 2018
    Assignee: Cyberonics, Inc.
    Inventors: Eric Y. Chow, David L. Thompson
  • Patent number: 9913985
    Abstract: In electrically stimulating neural tissue it is important to prevent over stimulation and unbalanced stimulation which would cause damage to the neural tissue, the electrode, or both. It is critical that neural tissue in not subjected to any direct current or alternating current above a safe threshold. Further, it is important to identify defective electrodes as continued use may result in neural and further electrode damage. The present invention presents system and stimulator control mechanisms to prevent damage to neural tissue.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: March 13, 2018
    Assignee: Second Sight Medical Products, Inc.
    Inventors: Robert Jay Greenberg, Kelly Hobart McClure, James Singleton Little, Rongqing Dai, Arup Roy, Richard Agustin Castro, John Reinhold, Kea-Tiong Tang, Sumit Yadav, Chunhong Zhou, Dao Min Zhou, Pishoy Maksy
  • Patent number: 9884194
    Abstract: On a channel of an implantable cardiac generator, a cardiac lead is replaced by a vagus nerve stimulation VNS lead. The control circuit controlling the stimulation circuit of this channel of the generator is configured to generate sequences of VNS neurostimulation bursts according to a specific profile, synchronized or not with the heart rate. The control circuit dynamically controls the initial load voltage of the reservoir capacitor so as to adjust to a constant target value the electrical charge delivered to the nerve by each stimulating pulse, from a pulse to the next one and from a burst to the next one. This improves the consistency of the physiological effects of neurostimulation despite significant variations that may occur in impedance at the electrode/vagus nerve interface.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: February 6, 2018
    Assignee: SORIN CRM SAS
    Inventors: Thierry Legay, Hervé Blumstein, Guillaume Chatalic, Christine Henry
  • Patent number: 9878164
    Abstract: Methods and device for determining a pacing vector for delivering an electrostimulation therapy are described. An implantable medical device may be configured to determine an anode capture threshold and a cathode capture threshold for a first anode and cathode pair of electrodes, switch a polarity of the first anode and cathode pair of electrodes, and determine an anode capture threshold and a cathode capture threshold for the first anode and cathode pair of electrodes having the switched polarity. The implantable medical device may be further configured to compare a cathodal capture threshold for the anode and cathode pair having the switched polarity to the anodal capture threshold of the first anode and cathode pair of electrodes and select either an anode or a cathode for delivering an electrostimulation therapy based at least in part on the comparison. Other methods and systems are also contemplated and described.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: January 30, 2018
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Holly E. Rockweiler, Shibaji Shome, Arjun D. Sharma, Deepa Mahajan, Sunipa Saha
  • Patent number: 9849294
    Abstract: Embodiments of the invention are related to medical systems and methods that can be used to control features of implanted medical devices, amongst other things. In an embodiment, the invention includes a medical system including an external medical device. The external medical device including a video output and a processor in communication with the video output. The system can be configured to display information through the video output as a graph, the graph comprising data representing pacing rates of an implantable device as a function of activity level over time. The system can further be configured to accept user input through direct manipulation of the graph. Other embodiments are also included herein.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: December 26, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jonathan H. Kelly, James Kalgren, David L. Perschbacher, James O. Gilkerson, Les N. Peterson
  • Patent number: 9820673
    Abstract: An implanted device for an organ of a patient including a housing. The device includes a detector having electrodes that have a varying distance over time between them which produces a detector signal based on electrical signals derived from the organ. The device includes a signal processor disposed in the housing in communication with the detector which determines admittance from the detector signal based on the varying distance over time between the electrodes. The device includes a drive circuit disposed in the housing to cause the electrodes to generate emitted electrical signals. A method for monitoring a patient's organ.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: November 21, 2017
    Assignee: Board of Regents, The University of Texas System
    Inventors: Marc D. Feldman, John Porterfield, Karthik Raghavan, Jonathan W. Valvano, John A. Pearce
  • Patent number: 9795791
    Abstract: The present disclosure provides systems and methods for cardiac stimulation. A cardiac stimulation device includes a plurality of electrodes, and a pulse circuit electrically coupled to the plurality of electrodes, the pulse circuit including a capacitor configured to charge to an initial charge level, deliver a test pulse having a first amplitude to the plurality of electrodes by only partially discharging, and subsequently deliver a backup pulse to the plurality of electrodes, the backup pulse having a second amplitude that is larger than the first amplitude.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: October 24, 2017
    Assignee: Pacesetter, Inc.
    Inventors: Benjamin T. Persson, Matthew G. Fishler
  • Patent number: 9776009
    Abstract: Systems, methods, and graphical user interfaces are described herein for non-invasively detecting phrenic nerve stimulation during cardiac pacing therapy. Phrenic nerve stimulation information may be generated for one or more electrical pacing vectors at one or more power configurations. The phrenic nerve stimulation information may be displayed to a user for use in configuring and/or evaluating cardiac pacing therapy.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: October 3, 2017
    Assignee: Medtronic, Inc.
    Inventors: Subham Ghosh, Vincent Splett
  • Patent number: 9763588
    Abstract: Some embodiments described herein relate to a method that includes defining an electro-anatomical model of a heart. The electro-anatomical model can include conduction patterns for multiple patterns or phases identified by a measurement instrument. The electro-anatomical model can also include a voltage map of the heart. A portion of the heart containing a rotor can be identified based on circulation in one phase of the model. The rotor can be determined to be stable based on that portion of the heart having circulation in another phase of the model. The rotor can be characterized as a substrate rotor based on the rotor being stable and based on the voltage or a change in voltage at the portion of the heart containing the rotor. The rotor can be treated or ablated when the rotor is determined to be a substrate rotor.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: September 19, 2017
    Assignee: AFTx, Inc.
    Inventors: Jerome Edwards, Bao Nguyen, Paul Kessman, Thomas Kurian
  • Patent number: 9764148
    Abstract: System and methods for energy adaptive communications between medical devices are disclosed. In one example, a medical device includes a communication module configured to deliver a plurality of pulses to tissue of a patient, where each pulse has an amount of energy. A control module operatively coupled to the communication module, may be configured to, for each delivered pulse, determine whether the delivered pulse produces an unwanted stimulation of the patient and to change the amount of energy of the plurality of pulses over time so as to identify an amount of energy that corresponds to an unwanted stimulation threshold for the pulses. The control module may then set a maximum energy value for communication pulses that is below the unwanted stimulation threshold, and may deliver communication pulses below the maximum energy value during communication with another medical device.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: September 19, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, Paul Huelskamp, Michael J. Kane, Keith R. Maile
  • Patent number: 9750943
    Abstract: An implantable medical device includes an activity sensor, a pulse generator, and a control module. The control module is configured to determine an activity metric from the activity sensor signal over an activity metric interval and compare the activity metric to a loss of capture detection threshold. The control module may detect loss of capture in response to the activity metric being less than the loss of capture detection threshold and increase a pacing pulse output in response to detecting the loss of capture.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: September 5, 2017
    Assignee: Medtronic, Inc.
    Inventors: Todd J Sheldon, David M Steinhaus
  • Patent number: 9724519
    Abstract: In some examples, a leadless pacing device (LPD) is configured to switch from a sensing without pacing mode to ventricular pacing mode in response to determining that no intrinsic ventricular activity was detected within a ventricular event detection window for at least one cardiac cycle, which may be referred to as loss of conduction. The ventricular pacing mode may be selected based on whether atrial oversensing is detected in combination with the loss of conduction. In some examples, an atrio-ventricular synchronous pacing mode is selected in response to detecting loss of conduction and in response to determining that atrial oversensing is not detected. In addition, in some examples, an asynchronous ventricular pacing mode is selected in response to detecting both atrial oversensing and loss of conduction.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: August 8, 2017
    Assignee: Medtronic, Inc.
    Inventors: Wade M Demmer, Todd J Sheldon
  • Patent number: 9707400
    Abstract: Systems, methods, and interfaces are described herein for assisting in a user in configuring cardiac therapy. A projection of a phrenic nerve stimulation map may be projected on a graphical depiction of a portion of a patient's heart. The phrenic nerve stimulation map may indicate to a user the regions of the patient's heart that may have a likelihood of stimulating the patient's phrenic nerve.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: July 18, 2017
    Assignee: Medtronic, Inc.
    Inventors: Nathan A. Grenz, Ryan Lahm, Eric Schilling, Brian Schousek
  • Patent number: 9675279
    Abstract: A method for determining a time point of a heart movement is described, wherein an EKG signal showing the heart movement is received. A first time point is determined, after which a mechanical signal characterizing the heart movement will probably be received, as a function of the received EKG signal. A mechanical signal is also received after the determined first time point. The time point of a heart movement can be concluded based on the receive time point of the mechanical signal. An apparatus for determining a time point of a heart movement is also described. The apparatus has a first receive facility, a timing facility, a second receive facility, and an evaluation facility. The evaluation facility is configured to determine the receive time point of the mechanical signal and to determine a time point of a heart movement based on the determined receive time point of the mechanical signal.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 13, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Andre Henning
  • Patent number: 9662501
    Abstract: The present invention provides a technique for verifying pacing capture of a ventricular chamber, particularly to ensure desired delivery of a ventricular pacing regime (e.g., “CRT”). The invention also provides ventricular capture management by delivering a single ventricular pacing stimulus and checking inter-ventricular conduction during a temporal window to determine if the stimulus captured. If a loss-of-capture LOC) signal results from the capture management testing, then the applied pacing pulses are modified and the conduction test repeated. If LOC, an alert message can issue.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: May 30, 2017
    Assignee: Medtronic, Inc.
    Inventors: Luc R Mongeon, Karen J Kleckner, John C Rueter
  • Patent number: 9630014
    Abstract: The technology disclosed herein relates to a system and method for analyzing medical device programming parameters. One aspect of the current technology is a method where an overall performance metric is detected for a cardiac medical device that is outside of a threshold at a first cardiac location in a patient. Processing circuitry identifies a first operating condition and sensing circuitry measures a first sensor response during the first operating condition. An adjustment is proposed to one or more programming parameters of the medical device based on the performance metric, the first operating condition, and the sensor response to the operating condition.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: April 25, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Viktoria A. Averina, Pramodsingh Hirasingh Thakur, Qi An
  • Patent number: 9610438
    Abstract: A delivery catheter, including a catheter body, a side port, a first electrode, and a second electrode, is described. The catheter body may comprise a proximal end, a distal end, and a perimeter surface. The catheter body defines a delivery lumen extending longitudinally within the catheter body. The side port is defined in the perimeter surface of the catheter body proximate the distal end and in communication with the delivery lumen. The electrodes may be adjacent to and spaced from the side port. Techniques for using the delivery catheter to identify a desired lead implantation location, e.g., via the electrodes, and implant a medical lead or other implantable element at the desired location through the delivery lumen and side port are also described.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: April 4, 2017
    Assignee: Medtronic, Inc.
    Inventor: Richard John Schilling
  • Patent number: 9597515
    Abstract: Systems and methods may facilitate selection of a vector for delivering electrical stimulation to a patient's heart. One illustrative method may include delivering electrical stimulation at a first voltage to each vector in a first set of two or more vectors of a multi-vector medical system, determining whether the delivered electrical stimulation at the first voltage resulted in capture for each of the vectors in the first set of two or more vectors, identifying those vectors of the first set of two or more vectors that were determined to result in capture as a second set of vectors, delivering electrical stimulation at a second voltage that is lower than the first voltage to each vector in the second set of vectors, and determining whether the delivered electrical stimulation at the second voltage resulted in capture for each of the vectors in the second set of vectors.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: March 21, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Holly E. Rockweiler, Sunipa Saha, Keith L. Herrmann, Yinghong Yu, Joel A. Krueger
  • Patent number: 9592394
    Abstract: The invention relates to a device incorporating an endocardial acceleration (EA) sensor. A capture test circuit of the device collects a sampled EA signal and extracts a limited series of EA measurements during a duration of a predetermined temporal window opened after delivery of a pacing pulse. An indicator value based on an average of absolute values of successive EA measurements of the series of EA measurements is calculated at an end of the temporal window. The indicator value is compared to a predetermined discrimination threshold to determine the presence or absence of a capture according to whether the indicator value lies above or below the predetermined discrimination threshold. The indicator value is very robust to noise and particularly efficient in terms of computing, which reduces, in large proportions, consumption of the digital processor and thus of the capsule.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: March 14, 2017
    Assignee: SORIN CRM SAS
    Inventor: Alaa Makdissi
  • Patent number: 9586051
    Abstract: A medical device is configured to deliver a high-energy electrical stimulation pulse to a patient that produces a post-stimulation polarization signal. A cardiac signal analyzer of the medical device is configured to detect a cardiac electrical signal superimposed on the post-stimulation polarization signal, determine at least one feature of the detected cardiac electrical signal, compare the feature to criteria that differentiate an intrinsic cardiac event during the post-stimulation polarization signal from an evoked response signal and identify the detected cardiac electrical signal as the intrinsic cardiac event if the feature meets the criteria.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: March 7, 2017
    Assignee: Medtronic, Inc.
    Inventors: Saul E. Greenhut, Michael T. Hemming
  • Patent number: 9561377
    Abstract: A method for delivering therapy in a medical device includes a two-tiered approach of determining the presence of a lead-related condition, and determining, in response to a lead-related condition being present, the presence of oversensing. Delivery of therapy by the medical device is controlled in response to determining that both the lead-related condition and oversensing are present.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: February 7, 2017
    Assignee: Medtronic, Inc.
    Inventor: Bruce D. Gunderson
  • Patent number: 9561375
    Abstract: The various embodiments herein relate to systems and methods for controlling the operation of a pulsatile heart assist device in a patient. The systems and methods include utilizing sounds and electrical signals produced by the heart to control the operation of the heart assist device.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: February 7, 2017
    Assignee: Sunshine Heart Company Pty, Ltd.
    Inventors: William Suttle Peters, Rodney Gordon Parkin
  • Patent number: 9555250
    Abstract: A medical device system and method for determining pacing threshold data that includes a cardiac capture sensor, a phrenic nerve stimulation sensor, a pulse generator selectively coupled to a plurality of electrode vectors to deliver a phrenic nerve stimulation pulse, and a processor coupled to the cardiac capture sensor, the phrenic nerve stimulation sensor and the pulse generator and configured to deliver the phrenic nerve stimulation pulse along the plurality of electrode vectors, determine, for each vector of the plurality of vectors, whether phrenic nerve stimulation is detected in response to the delivered phrenic nerve stimulation, deliver a pacing pulse along only the vectors of the plurality of vectors that phrenic nerve stimulation is determined not to be detected, and determine pacing capture thresholds in response to the delivered pacing pulse.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: January 31, 2017
    Assignee: Medtronic, Inc.
    Inventors: Wade M Demmer, Karen J Kleckner
  • Patent number: 9539429
    Abstract: The present invention involves approaches for selecting one or more electrode combinations.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: January 10, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: M. Jason Brooke, Andrea Acuna
  • Patent number: 9533160
    Abstract: Electrical stimulation may be delivered to a patient's heart using a plurality of cardiac electrodes. Each electrode combination may be evaluated based on one or more first parameters and one or more second parameters. In many cases, the one or more first parameters are supportive of cardiac function consistent with a prescribed therapy and the one or more second parameters are not supportive of cardiac function consistent with the prescribed therapy. The electrode combination selected to deliver a cardiac pacing therapy may be more associated with the one or more first parameters supportive of cardiac function consistent with the prescribed therapy and less associated with the one or more second parameters inconsistent with cardiac function.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: January 3, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: M. Jason Brooke, Andrea Acuna
  • Patent number: 9533165
    Abstract: An implantable medical device is configured to detect saturation events from a cardiac electrical signal, detect a tachyarrhythmia based at least in part on the cardiac electrical signal, responsive to detecting the tachyarrhythmia, and compare the detected saturation events to lead issue criteria. If the detected saturation events satisfy lead issue criteria, a therapy for treating the tachyarrhythmia is withheld by the implantable medical device.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: January 3, 2017
    Assignee: Medtronic, Inc.
    Inventor: Bruce D. Gunderson
  • Patent number: 9498631
    Abstract: A medical device system and method for determining pacing threshold data that includes a cardiac capture sensor, a phrenic nerve stimulation sensor, a pulse generator selectively coupled to a plurality of electrode vectors to deliver a pacing stimulation pulse, and a processor coupled to the cardiac capture sensor, the phrenic nerve stimulation sensor and the pulse generator and configured to deliver the pacing simulation pulse along the plurality of electrode vectors, determine, for each vector of the plurality of vectors, a pacing capture threshold in response to the delivered pacing pulse, deliver a phrenic nerve stimulation pulse along only the vectors of the plurality of vectors that the determined pacing capture threshold is less than a predetermined pacing capture threshold limit, and determine whether phrenic nerve stimulation is detected in response to the delivered phrenic nerve stimulation pulse.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: November 22, 2016
    Assignee: Medtronic, Inc.
    Inventors: Wade M Demmer, Karen J Kleckner
  • Patent number: 9480848
    Abstract: Systems, devices and methods for using environmental data to manage health care are disclosed. One aspect is an advanced patient management system. In various embodiments, the system includes at least one implantable medical device (IMD) to acquire at least one IMD parameter indicative of patient wellness, means to acquire at least one environmental parameter from at least one external source, and means to correlate the at least one parameter indicative of patient wellness and the at least one environmental parameter to assist with patient health care decisions. Other aspects and embodiments are provided herein.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: November 1, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: John Hatlestad, Jeffrey E. Stahmann, Qingsheng Zhu
  • Patent number: 9474457
    Abstract: A method and system of cardiac pacing is disclosed. A baseline rhythm is determined using a plurality of body-surface electrodes. A set of baseline functional electrical metrics is determined in response to determining the baseline rhythm. Resynchronization pacing is delivered using a right ventricular electrode and a pacing left ventricular electrode or only with a left ventricular electrode. A set of functional electrical metrics relating to cardiac depolarization and repolarization is determined in response to resynchronization pacing. A determination is made as to whether relative reduction of at least one functional electrical metric from the set of functional electrical metrics exceeds X % of its corresponding value from the set of baseline functional electrical metrics. A determination is made as to whether an absolute value of at least one electrical metric from the set of the functional electrical metrics is less than Y ms.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: October 25, 2016
    Assignee: Medtronic, Inc.
    Inventors: Subham Ghosh, Jeffrey M Gillberg
  • Patent number: 9446253
    Abstract: System and methods for energy adaptive communications between medical devices are disclosed. In one example, a medical device includes a communication module configured to deliver a plurality of pulses to tissue of a patient, where each pulse has an amount of energy. A control module operatively coupled to the communication module, may be configured to, for each delivered pulse, determine whether the delivered pulse produces an unwanted stimulation of the patient and to change the amount of energy of the plurality of pulses over time so as to identify an amount of energy that corresponds to an unwanted stimulation threshold for the pulses. The control module may then set a maximum energy value for communication pulses that is below the unwanted stimulation threshold, and may deliver communication pulses below the maximum energy value during communication with another medical device.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: September 20, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, Paul Huelskamp, Michael J. Kane, Keith R. Maile