Patents by Inventor Krzysztof Z. Siejko

Krzysztof Z. Siejko 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: 20210113135
    Abstract: Methods and/or device facilitating and selecting among multiple modes of filtering a cardiac electrical signal, in which one filtering mode includes additional high pass filtering of low frequency signals, relative to the other filtering mode. The selection filtering modes may include comparing sensed signal amplitude to one or more thresholds, using the multiple modes of filtering. In another example, an additional high pass filter is enabled, over and above a default or baseline filtering mode, and the detected cardiac signal is monitored for indications of possible undersensing, and/or for drops in amplitude toward a threshold, and the additional high pass filter may be disabled upon finding of possible undersensing or drop in signal amplitude.
    Type: Application
    Filed: December 9, 2020
    Publication date: April 22, 2021
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: VENUGOPAL ALLAVATAM, STEPHEN J. HAHN, KEITH L. HERRMANN, MITCHELL D. LANZ, KRZYSZTOF Z. SIEJKO, BENJAMIN SPEAKMAN
  • Patent number: 10893813
    Abstract: Various system embodiments comprise a stimulator adapted to deliver a stimulation signal for a heart failure therapy, a number of sensors adapted to provide at least a first measurement of a heart failure status and a second measurement of the heart failure status, and a controller. The controller is connected to the stimulator and to the number of sensors. The controller is adapted to use the first and second measurements to create a heart failure status index, and control the stimulator to modulate the signal using the index. Other aspects and embodiments are provided herein.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: January 19, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Imad Libbus, Krzysztof Z. Siejko, Marina V. Brockway, Robert J. Sweeney
  • Patent number: 10888238
    Abstract: Methods and/or device facilitating and selecting among multiple modes of filtering a cardiac electrical signal, in which one filtering mode includes additional high pass filtering of low frequency signals, relative to the other filtering mode. The selection filtering modes may include comparing sensed signal amplitude to one or more thresholds, using the multiple modes of filtering. In another example, an additional high pass filter is enabled, over and above a default or baseline filtering mode, and the detected cardiac signal is monitored for indications of possible undersensing, and/or for drops in amplitude toward a threshold, and the additional high pass filter may be disabled upon finding of possible undersensing or drop in signal amplitude.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: January 12, 2021
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Venugopal Allavatam, Stephen J. Hahn, Keith L. Herrmann, Mitchell D. Lanz, Krzysztof Z. Siejko, Benjamin Speakman
  • Publication number: 20200375490
    Abstract: Systems and methods for classifying a cardiac arrhythmia are discussed. An exemplary system includes a correlator circuit to generate autocorrelation sequences using information of cardiac activity of a subject, including signal segments taken from a cardiac signal at respective elapsed time with respect to reference time. The correlator circuit can generate a correlation image using the autocorrelation sequences. The correlation image may be constructed by stacking the autocorrelation sequences according to the elapsed time of signal segments. An arrhythmia classifier circuit can classify the cardiac activity of the subject as one of arrhythmia types using the correlation image.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 3, 2020
    Inventors: Keith L. Herrmann, Krzysztof Z. Siejko, Deepa Mahajan, Gezheng Wen
  • Patent number: 10849524
    Abstract: Methods and devices adapted for cardiac signal analysis. A method or device has accessible to it more than one approach to cardiac cycle rate analysis and is adapted to monitor sensing signal quality. In response to an apparent reduction in signal quality or other trigger, the method or device checks whether an arrhythmia or an actual drop in signal quality is occurring prior to modifying sensing configurations or parameters.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: December 1, 2020
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Amy Jean Brisben, Krzysztof Z. Siejko, Thomas V. Karathanos
  • Publication number: 20200360699
    Abstract: Methods, systems and devices for providing cardiac resynchronization therapy (CRT) to a patient using a leadless cardiac pacemaker (LCP) and an extracardiac device (ED). The LCP is configured to deliver pacing therapy at a pacing interval. Illustratively, the ED may be configured to analyze the cardiac cycle including a portion preceding the pacing therapy delivery for one or several cardiac cycles, and determine whether an interval from the P-wave to the pace therapy in the cardiac cycle(s) is in a desired range. In an example, if the P-wave to pace interval is outside the desired range, the ED communicates to the LCP to adjust the pacing interval.
    Type: Application
    Filed: August 5, 2020
    Publication date: November 19, 2020
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: STEPHEN J. HAHN, KRZYSZTOF Z. SIEJKO, AMY JEAN BRISBEN, KEITH R. MAILE
  • Publication number: 20200324120
    Abstract: This document discusses, among other things, systems and methods to determine a response curve between received cardiac electrical information from a subject, such as a time of a P wave, and received cardiac acceleration information of the subject, such as a time of a first heart sound (S1) or a second heart sound (S2), to a set of stimulation signals provided to the subject at different AVD intervals. In certain examples, one or more cardiac resynchronization therapy (CRT) parameters can be determined for the subject using the determined response curve.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 15, 2020
    Inventors: Yinghong Yu, Krzysztof Z. Siejko, Qi An
  • Publication number: 20200324121
    Abstract: This document discusses, among other things, systems and methods to determine a response between received cardiac electrical information from a subject, such as a time of a P wave, and received cardiac acceleration information of the subject, such as a time of a first heart sound (S1) or a second heart sound (S2), across a set of stimulation signals provided to the subject at different AVD intervals, and determining one or more cardiac resynchronization therapy (CRT) parameters using an inflection point of the determined response.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 15, 2020
    Inventors: Yinghong Yu, Krzysztof Z. Siejko, Qi An
  • Patent number: 10780278
    Abstract: Methods, systems and devices for providing cardiac resynchronization therapy (CRT) to a patient using a leadless cardiac pacemaker (LCP) and an extracardiac device (ED). The LCP is configured to deliver pacing therapy at a pacing interval. Illustratively, the ED may be configured to analyze the cardiac cycle including a portion preceding the pacing therapy delivery for one or several cardiac cycles, and determine whether an interval from the P-wave to the pace therapy in the cardiac cycle(s) is in a desired range. In an example, if the P-wave to pace interval is outside the desired range, the ED communicates to the LCP to adjust the pacing interval.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: September 22, 2020
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Stephen J. Hahn, Krzysztof Z. Siejko, Amy Jean Brisben, Keith R. Maile, Jr.
  • Patent number: 10758724
    Abstract: A delivery and deployment device may include a handle assembly and a shaft extending distally from the handle assembly. A device containment housing may be coupled to a distal region of the shaft and may extend distally therefrom. The distal containment housing may be configured to accommodate at least a portion of the IMD therein. The IMD may, for example, be a leadless pacemaker, a lead, a neurostimulation device, a sensor or any other suitable IMD. A plurality of electrodes may be distributed about an exterior surface of the device containment housing such that at least some of the plurality of electrodes may be positioned to test a potential IMD deployment location before deploying the IMD.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: September 1, 2020
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Brendan Early Koop, Yinghong Yu, Qi An, Keith R. Maile, Pramodsingh Hirasingh Thakur, Bin Mi, Jeffrey E. Stahmann, Viktoria A. Averina, Krzysztof Z. Siejko, Michael J. Kane, Allan Charles Shuros, Arjun D. Sharma, Brian Soltis
  • Patent number: 10744334
    Abstract: Systems and methods for detecting cardiac arrhythmias such as an atrial fibrillation (AF) are described herein. The AF detection system includes a sensor circuit to sense a physiological signal, a heartbeat processor to recognize a plurality of beat patterns using cycle length of two more consecutive cardiac cycles. The beat patterns can be indicative of temporal relationship between the consecutive cardiac cycles. The heartbeat processor may generate a repetitiveness indictor based on a statistical measurement of various beat patterns. The AF detection system includes an arrhythmia detector to detect an episode of AF based on the repetitiveness indictor, and to discriminate the AF from other arrhythmias of atrio-ventricular conduction abnormalities.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 18, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Arjun D. Sharma, Sunipa Saha, Krzysztof Z. Siejko
  • Patent number: 10729909
    Abstract: A system and method to sense heart sounds with one or more implantable medical devices according to one or more signal processing parameters. The method alters one or more of the parameters as a function of one or more physiologic triggering events. The method then senses heart sounds with the one or more implantable medical devices according to at least the one or more altered signal processing parameters.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: August 4, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, Krzysztof Z. Siejko, Carlos Haro, Abhilash Patangay, Gerrard M. Carlson, Andres Belalcazar
  • Patent number: 10687728
    Abstract: This document discusses, among other things, systems and methods to adjust arrhythmia detection using physiological information of a patient, including detecting a candidate cardiac event about a threshold, displaying the detected candidate cardiac event to a user, receiving user information about the detected candidate cardiac event, and adjusting an arrhythmia detection threshold based upon the received user information.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: June 23, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Keith L. Herrmann, Sunipa Saha, Arjun D. Sharma, David L. Perschbacher, Derek D. Bohn, Krzysztof Z. Siejko
  • Patent number: 10646131
    Abstract: An apparatus includes a cardiac signal sensing circuit configured to generate a sensed cardiac signal representative of electrical cardiac activity of a subject, a buffer memory and a pause detection circuit. The pause detection circuit is configured to: identify ventricular depolarization in the cardiac signal or the sampled cardiac signal; detect a candidate pause episode using the cardiac signal in which delay in ventricular depolarization exceeds a specified delay threshold; identify noise events in a stored cardiac signal; and discard the cardiac signal of the candidate pause episode when a number of noise events satisfies a specified noise event number threshold, otherwise store the cardiac signal of the candidate pause episode as a bradycardia pause episode.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: May 12, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Krzysztof Z. Siejko, Derek D. Bohn, David L. Perschbacher, Adam MacEwen, Sunipa Saha, Keith L. Herrmann
  • Publication number: 20200094063
    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: Application
    Filed: November 12, 2019
    Publication date: March 26, 2020
    Applicant: 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
  • Publication number: 20200077914
    Abstract: Systems and methods for detecting atrial tachyarrhythmia are discussed. An exemplary atrial tachyarrhythmia detection system includes an arrhythmia detector circuit configured to receive physiologic information of a patient, generate a morphological similarity metric between the received physiologic information and a sinus rhythm (SR) template representing a morphology of conducted sinus beats during normal SR, and generate a morphological variability metric indicative of a variability in morphology between heart beats in the received physiologic information. The arrhythmia detector circuit may detect an atrial tachyarrhythmia episode the morphological similarity and morphological variability metrics.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 12, 2020
    Inventors: Krzysztof Z. Siejko, David L. Perschbacher, Sunipa Saha
  • Publication number: 20200001092
    Abstract: An implantable medical device (IMD) that includes a housing, a first electrode secured relative to the housing, a second electrode secured relative to the housing, and a gyroscope secured relative to the housing. The IMD may include circuitry in the housing in communication with the first electrode, the second electrode, and the gyroscope. The circuitry may be configured to determine and store a plurality of torsion data measurements, from which a representation of a twist profile may be determined.
    Type: Application
    Filed: August 8, 2019
    Publication date: January 2, 2020
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Bin Mi, Pramodsingh Hirasingh Thakur, Jeffrey E. Stahmann, Keith R. Maile, Qi An, Brendan Early Koop, Yinghong Yu, Viktoria A. Averina, Michael J. Kane, Krzysztof Z. Siejko
  • 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
  • Publication number: 20190343480
    Abstract: Systems and methods for detecting heart sound information from a subject's head are described. A system embodiment includes a headgear to be worn on the subject's head, and first and second sensors to sense respectively first and second physiologic signals each representing vibration, motion, or displacement conducted through patient body tissue. The sensed physiologic signals contain heart sound information. At least one of the first or the second sensor is included in the headgear, and placed at a head location to sense a physiologic signal indicative of heart sounds. The system includes a processor to generate a composite signal using the sensed first and second physiologic signals. The system may generate a heart sound metric using the composite signal, and detect a cardiac event such as an arrhythmia or worsening heart failure.
    Type: Application
    Filed: April 17, 2019
    Publication date: November 14, 2019
    Inventors: Jonathan Bennett Shute, Rezwan Ahmed, Bin Mi, Krzysztof Z. Siejko, Pramodsingh Hirasingh Thakur, Qi An
  • Patent number: 10463305
    Abstract: Methods, systems and devices for providing cardiac resynchronization therapy (CRT) to a patient using a leadless cardiac pacemaker (LCP) and an extracardiac device (ED). The system is configured to identify atrial events to use as timing markers for the LCP to deliver CRT, and further to determine whether the timing markers are incorrectly sensed and to make adjustment or call for re-initialization as needed.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: November 5, 2019
    Assignee: CARDIAC PACEMAKERS, INC.
    Inventors: Qi An, Pramodsingh Hirasingh Thakur, Stephen J. Hahn, Yinghong Yu, Krzysztof Z. Siejko, Viktoria A. Averina, Brendan Early Koop, Keith R. Maile, Bin Mi