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).

  • Managing preload reserve by tracking the ventricular operating point with heart sounds
    Patent number: 9403017
    Abstract: A system and method for managing preload reserve and tracking the inotropic state of a patient's heart. The S1 heart sound is measured as a proxy for direct measurement of stroke volume. The S3 heart sound may be measured as a proxy for direct measurement of preload level. The S1-S3 pair yield a point on a Frank Starling type of curve, and reveal information regarding the patient's ventricular operating point and inotropic state. As an alternative, or in addition to, measurement of the S3 heart sound, the S4 heart sound may be measured or a direct pressure measurement may be made for the sake of determining the patient's preload level. The aforementioned measurements may be made by a cardiac rhythm management device, such as a pacemaker or implantable defibrillator.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: August 2, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Gerrard M. Carlson, Ramesh Wariar, Krzysztof Z. Siejko
  • Systems and methods for ranking and selection of pacing vectors
    Patent number: 9393426
    Abstract: Approaches to rank potential left ventricular (LV) pacing vectors are described. Early elimination tests are performed to determine the viability of LV cathode electrodes. Some LV cathodes are eliminated from further testing based on the early elimination tests. LV cathodes identified as viable cathodes are tested further. Viable LV cathode electrodes are tested for hemodynamic efficacy. Cardiac capture and phrenic nerve activation thresholds are then measured for potential LV pacing vectors comprising a viable LV cathode electrode and an anode electrode. The potential LV pacing vectors are ranked based on one or more of the hemodynamic efficacy of the LV cathodes, the cardiac capture thresholds, and the phrenic nerve activation thresholds.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: July 19, 2016
    Assignee: Cardiac Pacemarkers, Inc.
    Inventors: Krzysztof Z. Siejko, Shibaji Shome, Jiang Ding
  • Heart sound tracking system and method
    Patent number: 9364193
    Abstract: A system and method provide heart sound tracking, including an input circuit, configured to receive heart sound information, and a heart sound recognition circuit. The heart sound recognition circuit can be coupled to the input circuit and can be configured to recognize, within a particular heart sound of a particular heart sound waveform, a first intra heart sound energy indication and a corresponding first intra heart sound time indication using the heart sound information from the particular heart sound waveform and the heart sound information from at least one other heart sound waveform. The particular heart sound can include at least a portion of one of S1, S2, S3, and S4. Further, the first intra heart sound energy indication and the corresponding first intra heart sound time indication can correspond to the at least a portion of one of S1, S2, S3, and S4, respectively.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: June 14, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Abhilash Patangay, Krzysztof Z. Siejko, Gerrard M. Carlson
  • REFRACTORY AND BLANKING INTERVALS IN THE CONTEXT OF MULTI-SITE LEFT VENTRICULAR PACING
    Publication number: 20160089539
    Abstract: A refractory period for a pacemaker sensing channel refers to a period of time during which the sensing channel is either blind to incoming electrical signals, termed a blanking interval, and/or during which the device is configured to ignore such signals for purposes of sense event detection. Methods and devices for implementing refractory periods in the context of multi-site left ventricular pacing are described.
    Type: Application
    Filed: October 1, 2015
    Publication date: March 31, 2016
    Inventors: James O. Gilkerson, James Kalgren, Krzysztof Z. Siejko, Jeffrey E. Stahmann
  • Automatic pacing configuration switcher
    Patent number: 9295843
    Abstract: A system or apparatus can provide electrostimulations via an electrode configuration that can be selected from multiple electrode configurations, the electrostimulations of the type for inducing a desired heart contraction, or a neurostimulation response. The system or apparatus can allow communicating with an external device to receive an input indicating a degree of patient discomfort with an electrostimulation delivered using a first electrode configuration, and can associate information about the degree of discomfort with information about the corresponding first electrode configuration for use by a controller circuit in determining a second electrode configuration for delivering a subsequent electrostimulation.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: March 29, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Eric K. Enrooth, Sunipa Saha, Krzysztof Z. Siejko, Kenneth N. Hayes, Aaron R. McCabe
  • Adaptive phrenic nerve stimulation detection
    Patent number: 9272151
    Abstract: An example of a system comprises a cardiac pulse generator configured to generate cardiac paces to pace the heart, a sensor configured to sense a physiological signal for use in detecting pace-induced phrenic nerve stimulation (PS), a storage, and a phrenic nerve stimulation detector. The storage is configured for use to store patient-specific PS features for PS beats with a desirably large signal-to-noise ratio. The phrenic nerve stimulation detector may be configured to detect PS features for the patient by analyzing a PS beat with a desirably large signal-to-noise ratio induced using a pacing pulse with a large energy output and store patient-specific PS features in the storage, and use the patient-specific PS features stored in the memory to detect PS beats when the heart is paced heart using cardiac pacing pulses with a smaller energy output.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: March 1, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Krzysztof Z. Siejko, Sunipa Saha, Aaron R. McCabe, Holly Rockweiler
  • CARDIAC RATE TRACKING IN AN IMPLANTABLE MEDICAL DEVICE
    Publication number: 20160045131
    Abstract: Self-correlation enhancements and implementations are described. In particular, certain examples demonstrate the use of a tracking mechanism to identify and/or confirm cardiac rate using data from iterative self-correlation performed at intervals over time. This may enable the interpolation of cardiac rate in an implantable medical device when data is insufficient, and may provide confidence in cardiac rate analyses.
    Type: Application
    Filed: August 6, 2015
    Publication date: February 18, 2016
    Applicant: CAMERON HEALTH, INC.
    Inventor: Krzysztof Z. Siejko
  • PEAK SELECTION FOR SELF CORRELATION ANALYSIS OF CARDIAC RATE IN AN IMPLANTABLE MEDICAL DEVICES
    Publication number: 20160045132
    Abstract: Self-correlation enhancements and implementations are described. In particular, certain examples demonstrate the use of a peak selector to identify peaks of a self-correlation function which serve as candidate cardiac rates for an implantable medical device. The approach may enable an alternative calculation of cardiac rate in an implantable medical device as a stand-alone rate detector or as a double-check of other rate calculations.
    Type: Application
    Filed: August 6, 2015
    Publication date: February 18, 2016
    Applicant: CAMERON HEALTH, INC.
    Inventor: Krzysztof Z. Siejko
  • CALCULATION OF SELF-CORRELATION IN AN IMPLANTABLE CARDIAC DEVICE
    Publication number: 20160045136
    Abstract: Self-correlation enhancements and implementations are described. In particular, certain examples demonstrate the analytical tools to reduce the computational burden of generating a self-correlation function within an implantable medical device. Peak selector and tracking analysis are also included as secondary elements for identifying and generating confidence in rate estimates based on the self-correlation function. The approach may enable an alternative calculation of cardiac rate in an implantable medical device as a stand-alone rate detector or as a double-check of other rate calculations.
    Type: Application
    Filed: August 6, 2015
    Publication date: February 18, 2016
    Applicant: CAMERON HEALTH, INC.
    Inventors: Krzysztof Z. Siejko, Paul Huelskamp
  • Controlled titration of neurostimulation therapy
    Patent number: 9242105
    Abstract: Described herein are methods and devices that utilize electrical neural stimulation to treat heart failure by modulating a patient's autonomic balance in a manner that inhibits sympathetic activity and/or augments parasympathetic activity. Because other therapies for treating heart failure may also affect a patient's autonomic balance, a device for delivering neural stimulation is configured to appropriately titrate such therapy in either an open-loop or closed-loop fashion.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: January 26, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Marina V. Brockway, Imad Libbus, Krzysztof Z. Siejko, Robert J. Sweeney
  • USER INTERFACE SYSTEM FOR USE WITH MULTIPOLAR PACING LEADS
    Publication number: 20160008610
    Abstract: An interactive representation of electrostimulation electrodes or vectors can be provided, such as for configuring combinations of electrostimulation electrodes. In an example, electrodes or test parameters can be presented graphically or in a table. A user interface can be configured to receive user-input designating electrode combinations or vectors for test or for use in programming an implantable or ambulatory medical device. The interface can be used to indicate suggested electrode combinations or vectors in response to a first selection of an electrode. Tests can be performed on electrode combinations and vectors, and the results of the tests can be presented to a user using the interactive representation. In an example, test results can be analyzed by a processor and optionally used to program an implantable or ambulatory medical device.
    Type: Application
    Filed: September 18, 2015
    Publication date: January 14, 2016
    Inventors: Sunipa Saha, Kenneth N. Hayes, Keith L. Herrmann, James R. Kalgren, Aaron R. McCabe, Holly Elizabeth Rockweiler, Shibaji Shome, Krzysztof Z. Siejko
  • MULTI-SENSOR STRATEGY FOR HEART FAILURE PATIENT MANAGEMENT
    Publication number: 20160000338
    Abstract: An apparatus comprises plurality of sensors and a processor. Each sensor provides a sensor signal that includes physiological information and at least one sensor is implantable. The processor includes a physiological change event detection module that detects a physiological change event from a sensor signal and produces an indication of occurrence of one or more detected physiological change events, and a heart failure (HF) detection module. The HF detection module determines, using a first rule, whether the detected physiological change event is indicative of a change in HF status of a subject, determines whether to override the first rule HF determination using a second rules, and declares whether the change in HF status occurred according to the first and second rules.
    Type: Application
    Filed: September 17, 2015
    Publication date: January 7, 2016
    Inventors: Yi Zhang, Jeffrey E. Stahmann, Krzysztof Z. Siejko, Ramesh Wariar, Julie A. Thompson, John D. Hatlestad, Kenneth C. Beck
  • Phrenic nerve stimulation detection with posture sensing
    Patent number: 9211415
    Abstract: A method and a system of phrenic nerve stimulation detection in conjunction with posture sensing is disclosed. In an embodiment, the method may include receiving a trigger for conducting a pace-induced phrenic nerve stimulation (PS) search using the IMD within the patient. On receiving the trigger, the IMD may be used for conducting the PS search. A procedure of conducting the PS search may include measuring a posture of the patient using an implantable posture sensor, searching for PS while the patient is in the measured posture and obtaining a PS result from the PS search for the measured posture. The method may include recording both the PS result and the measured posture in a memory of the IMD.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: December 15, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Sunipa Saha, Holly Rockweiler, Aaron R. McCabe, Krzysztof Z. Siejko, John D. Hatlestad
  • Multi-sensor strategy for heart failure patient management
    Patent number: 9161698
    Abstract: An apparatus comprises plurality of sensors and a processor. Each sensor provides a sensor signal that includes physiological information and at least one sensor is implantable. The processor includes a physiological change event detection module that detects a physiological change event from a sensor signal and produces an indication of occurrence of one or more detected physiological change events, and a heart failure (HF) detection module. The HF detection module determines, using a first rule, whether the detected physiological change event is indicative of a change in HF status of a subject, determines whether to override the first rule HF determination using a second rules, and declares whether the change in HF status occurred according to the first and second rules.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: October 20, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Yi Zhang, Jeffrey E. Stahmann, Krzysztof Z. Siejko, Ramesh Wariar, Julie A. Thompson, John D. Hatlestad, Kenneth C. Beck
  • Left ventricular pacing protection in the context of multi-site left ventricular pacing
    Patent number: 9149641
    Abstract: In a pacing mode where the left ventricle is paced upon expiration of an escape interval that is reset by a right ventricular sense, there is the risk that the left ventricular pace may be delivered in the so-called vulnerable period that occurs after a depolarization and trigger an arrhythmia. To reduce this risk, a left ventricular protective period (LVPP) may be provided. Methods and devices for implementing an LVPP in the context of multi-site left ventricular pacing are described.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: October 6, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, James O. Gilkerson, Krzysztof Z. Siejko, Yinghong Yu
  • User interface system for use with multipolar pacing leads
    Patent number: 9138585
    Abstract: An interactive representation of electrostimulation electrodes or vectors can be provided, such as for configuring combinations of electrostimulation electrodes. In an example, electrodes or test parameters can be presented graphically or in a table. A user interface can be configured to receive user-input designating electrode combinations or vectors for test or for use in programming an implantable or ambulatory medical device. The interface can be used to indicate suggested electrode combinations or vectors in response to a first selection of an electrode. Tests can be performed on electrode combinations and vectors, and the results of the tests can be presented to a user using the interactive representation. In an example, test results can be analyzed by a processor and optionally used to program an implantable or ambulatory medical device.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 22, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Sunipa Saha, Kenneth N. Hayes, Keith L. Herrmann, James Kalgren, Aaron R. McCabe, Holly Rockweiler, Shibaji Shome, Krzysztof Z. Siejko
  • HEART SOUND TRACKING SYSTEM AND METHOD
    Publication number: 20150257729
    Abstract: A system and method provide heart sound tracking, including an input circuit, configured to receive heart sound information, and a heart sound recognition circuit. The heart sound recognition circuit can be coupled to the input circuit and can be configured to recognize, within a particular heart sound of a particular heart sound waveform, a first intra heart sound energy indication and a corresponding first intra heart sound time indication using the heart sound information from the particular heart sound waveform and the heart sound information from at least one other heart sound waveform. The particular heart sound can include at least a portion of one of S1, S2, S3, and S4. Further, the first intra heart sound energy indication and the corresponding first intra heart sound time indication can correspond to the at least a portion of one of S1, S2, S3, and S4, respectively.
    Type: Application
    Filed: June 3, 2015
    Publication date: September 17, 2015
    Inventors: Abhilash Patangay, Krzysztof Z. Siejko, Gerrard M. Carlson
  • IMPEDANCE WAVEFORM MONITORING FOR HEART BEAT CONFIRMATION
    Publication number: 20150216433
    Abstract: Implantable systems and methods directed toward improved accuracy in cardiac signal analysis. An impedance waveform is captured and used to confirm the analysis performed by the system on electrical signals or electrocardiogram. A detected heart beat from the electrocardiogram is either confirmed or identified as a misdetection depending on whether the impedance waveform shows likely correct or incorrect detection. Identified misdetection can then be corrected or otherwise mitigated.
    Type: Application
    Filed: January 29, 2015
    Publication date: August 6, 2015
    Inventors: Pramodsingh Hirasingh Thakur, Viktoria A. Averina, Amy J. Brisben, Krzysztof Z. Siejko
  • HEART FAILURE MANAGEMENT
    Publication number: 20150182750
    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: Application
    Filed: March 11, 2015
    Publication date: July 2, 2015
    Inventors: Imad Libbus, Krzysztof Z. Siejko, Marina V. Brockway, Robert J. Sweeney
  • Heart sound tracking system and method
    Patent number: 9049981
    Abstract: A system and method provide heart sound tracking, including an input circuit, configured to receive heart sound information, and a heart sound recognition circuit. The heart sound recognition circuit can be coupled to the input circuit and can be configured to recognize, within a particular heart sound of a particular heart sound waveform, a first intra heart sound energy indication and a corresponding first intra heart sound time indication using the heart sound information from the particular heart sound waveform and the heart sound information from at least one other heart sound waveform. The particular heart sound can include at least a portion of one of S1, S2, S3, and S4. Further, the first intra heart sound energy indication and the corresponding first intra heart sound time indication can correspond to the at least a portion of one of S1, S2, S3, and S4, respectively.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: June 9, 2015
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Abhilash Patangay, Krzysztof Z. Siejko, Gerrard M. Carlson