Patents by Inventor Keith L. Herrmann

Keith L. Herrmann 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).

  • Patent number: 9750942
    Abstract: Systems and methods for efficiently determining one or more parameters for vectors of a multi-electrode implantable medical device, and for identifying one or more suitable vectors for sensing cardiac electrical data and/or delivering electrical stimulation therapy based on one or more of the determined parameters. Reducing the time required to determine the one or more parameters for each vector can help reduce procedure time for implanting and/or configuring an implantable medical device, which can reduce costs and/or improved patient comfort.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: September 5, 2017
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Sunipa Saha, Keith L. Herrmann, Yinghong Yu, David W. Yost, Holly E. Rockweiler
  • Publication number: 20170173342
    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: Application
    Filed: March 9, 2017
    Publication date: June 22, 2017
    Inventors: Holly E. Rockweiler, Sunipa Saha, Keith L. Herrmann, Yinghong Yu, Joel A. Krueger
  • Publication number: 20170156617
    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: November 29, 2016
    Publication date: June 8, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Venugopal Allavatam, Stephen J. Hahn, Keith L. Herrmann, Mitchell D. Lanz, Krzysztof Z. Siejko, Benjamin Speakman
  • Publication number: 20170156670
    Abstract: In some examples, cardiac cycle detection may be used as a more or less default approach to cardiac activity tracking. Additional rate measurement relying on different sources or analyses may require extra power consumption over the cycle detection methods. Therefore, new methods and devices are disclosed that selectively activate a second cardiac rate measurement when needed. In some illustrative methods and devices, decisions are made as to whether and which previously collected data, if any, is to be discarded, replaced, or corrected upon activation of the second cardiac rate measurement.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 8, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Krzysztof Z. Siejko, Amy Jean Brisben, Stephen J. Hahn, Keith L. Herrmann, Venugopal Allavatam
  • Publication number: 20170156669
    Abstract: In some examples, cardiac cycle detection may be used as an approach to cardiac activity tracking, with one or more second approaches to cardiac activity tracking also available for use. Additional rate measurement relying on different sources or analyses may require extra power consumption over the cycle detection methods. Therefore, new methods and devices are disclosed that selectively activate a second cardiac rate measurement. In some illustrative methods and devices, decisions are made as to whether and which previously collected data, if any, is to be discarded, replaced, or corrected upon activation of the second cardiac rate measurement. In some illustrative methods and devices, a cardiac cycle detection approach to cardiac activity tracking may be bypassed by a second cardiac rate measurement.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 8, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Krzysztof Z. Siejko, Venugopal Allavatam, Amy Jean Brisben, Stephen J. Hahn, Keith L. Herrmann
  • Publication number: 20170120059
    Abstract: An apparatus comprises a stimulus circuit, a cardiac signal sensing circuit, and a control circuit. The stimulus circuit provides electrical pulse energy to a first pacing channel that includes a first left ventricular (LV) electrode as a cathode and a second pacing channel that includes a second LV electrode as a cathode. The cardiac signal sensing circuit senses cardiac signals using a first sensing channel that includes one of the first LV electrode or the second LV electrode. The control circuit includes a capture detection sub-circuit configured to: initiate delivery of electrical pulse energy to both the first pacing channel and the second pacing channel; sense cardiac depolarization of a ventricle using the first sensing channel; determine first and second cardiac capture pulse energy level thresholds for the first and second pacing channels respectively; and provide indications of the cardiac capture pulse energy level thresholds to a user or process.
    Type: Application
    Filed: October 26, 2016
    Publication date: May 4, 2017
    Inventors: Sunipa Saha, Keith L. Herrmann, Yinghong Yu
  • Publication number: 20170112399
    Abstract: Methods and devices for combining multiple signals from multiple sensing vectors for use in wearable or implantable cardiac devices. A preferred sensing configuration may be selected at a given point in time, for example under clinical conditions. Signal quality for the preferred sensing configuration is then monitored, and if the signal quality degrades under selected conditions, re-analysis may be performed to select a different sensing vector configuration for at least temporary use. If signal quality increases for the preferred sensing configuration, temporary use of the different sensing vector configuration may cease and reversion to the preferred sensing configuration takes place if certain conditions are met. The conditions for reversion may depend in part of a history of sensing signal quality for the preferred sensing configuration.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 27, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Amy Jean Brisben, Venugopal Allavatam, Krzysztof Z. Siejko, Deepa Mahajan, Kevin G. Wika, Keith L. Herrmann, Stephen J. Hahn
  • Publication number: 20170113053
    Abstract: New and alternative approaches to the monitoring of cardiac signal quality for external and/or implantable cardiac devices. In one example, signal quality is monitored continuously or in response to a triggering event or condition and, upon identification of a reduction in signal quality, a device may reconfigure its sensing state. In another example, one or more trends of signal quality are monitored by a device, either continuously or in response to a triggering event or condition, and sensing reconfiguration may be performed in response to identified trends and events. In yet another example, a device may use a looping data capture mode to track sensing data in multiple vectors while primarily relying on less than all sensing vectors to make decisions and, in response to a triggering event or condition, the looped data can be analyzed automatically, without waiting for additional data capture to reconfigure sensing upon identification of the triggering event or condition.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 27, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Amy Jean Brisben, Venugopal Allavatam, Krzysztof Z. Siejko, Deepa Mahajan, Kevin G. Wika, Keith L. Herrmann, Stephen J. Hahn
  • Publication number: 20170113040
    Abstract: Methods and devices for combining multiple signals from multiple sensing vectors for use in wearable or implantable cardiac devices. Signals from multiple vectors may be combined using weighting factors and/or by conversion to different coordinate systems than the original inputs, which may or may not be normalized to patient anatomy. Signals from multiple sensing vectors may be combined prior to or after several analytical steps or processes including before or after filtering, and before or after cardiac cycle detection. Cardiac cycle detection information may be combined across multiple sensing vectors before or after analysis of individual vectors for noise or overdetection. Cardiac cycle detection information may also be combined across multiple sensing vectors to identify noise and/or overdetection.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 27, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Amy Jean Brisben, Venugopal Allavatam, Krzysztof Z. Siejko, Deepa Mahajan, Kevin G. Wika, Keith L. Herrmann, Stephen J. Hahn
  • Publication number: 20170113050
    Abstract: Methods and devices for combining multiple signals from multiple sensing vectors for use in wearable or implantable cardiac devices. Signals from multiple vectors may be combined using weighting factors and/or by conversion to different coordinate systems than the original inputs, which may or may not be normalized to patient anatomy. Signals from multiple sensing vectors may be combined prior to or after several analytical steps or processes including before or after filtering, and before or after cardiac cycle detection. Cardiac cycle detection information may be combined across multiple sensing vectors before or after analysis of individual vectors for noise or overdetection. Cardiac cycle detection information may also be combined across multiple sensing vectors to identify noise and/or overdetection.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 27, 2017
    Applicant: CARDIAC PACEMAKERS, INC.
    Inventors: Amy Jean Brisben, Venugopal Allavatam, Deepa Mahajan, Krzysztof Z. Siejko, Kevin G. Wika, Keith L. Herrmann, Stephen J. Hahn
  • 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
  • Publication number: 20170027462
    Abstract: An apparatus includes a sensing circuit configured to generate a sensed physiological signal representative of cardiac activity of a subject, an arrhythmia detection circuit, a control circuit, and a memory. The arrhythmia detection circuit detects an episode of atrial fibrillation (AF) in the sensed cardiac signal using a first AF detection criterion, and detects the episode of AF using a second AF detection criterion. The first AF detection criterion has greater sensitivity to AF detection than the second AF detection criterion, and the second AF detection criterion has greater specificity to AF detection than the first AF detection criterion. The control circuit initiates storing of sampled values of a segment of the cardiac signal that includes the episode of AF when the episode of AF is detected by both the first AF detection criterion and the second AF detection criterion.
    Type: Application
    Filed: June 7, 2016
    Publication date: February 2, 2017
    Inventors: Deepa Mahajan, David L. Perschbacher, Keith L. Herrmann
  • Publication number: 20170014631
    Abstract: Systems and methods for providing CRT therapy to a patient with an implanted multi-site pacing medical device. In one example, an intrinsic electrical delay associated with each of two or more left ventricle electrodes may be determined. The intrinsic electrical delay associated with each of the two or more left ventricle electrodes may be compared to an electrical delay threshold. If the electrical delay associated with one or fewer left ventricle electrodes is greater than the electrical delay threshold, a single left ventricle electrode may be selected for use during subsequent CRT therapy. If the electrical delay associated with more than one left ventricle electrode is greater than the electrical delay threshold, two or more of the left ventricle electrodes may be selected for use during subsequent CRT therapy.
    Type: Application
    Filed: September 27, 2016
    Publication date: January 19, 2017
    Inventors: Yinghong Yu, Keith L. Herrmann, Holly Rockweiler, Sunipa Saha, Benjamin J. Nyquist
  • Patent number: 9457191
    Abstract: Systems and methods for providing CRT therapy to a patient with an implanted multi-site pacing medical device. In one example, an intrinsic electrical delay associated with each of two or more left ventricle electrodes may be determined. The intrinsic electrical delay associated with each of the two or more left ventricle electrodes may be compared to an electrical delay threshold. If the electrical delay associated with one or fewer left ventricle electrodes is greater than the electrical delay threshold, a single left ventricle electrode may be selected for use during subsequent CRT therapy. If the electrical delay associated with more than one left ventricle electrode is greater than the electrical delay threshold, two or more of the left ventricle electrodes may be selected for use during subsequent CRT therapy.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: October 4, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Yinghong Yu, Keith L. Herrmann, Holly E. Rockweiler, Sunipa Saha, Benjamin J. Nyquist
  • Patent number: 9393429
    Abstract: A system and method for cardiac rhythm management using a programmable cardiac rhythm management device is described, wherein the method includes storing parameter interaction constraints between different programmable parameters, storing programmable parameters for the device, wherein each programmable parameter has a predefined set of possible values, wherein one programmable parameter is a delay value, and calculating initial seed values for user-set delay range input fields, wherein the seed values do not violate any parameter interaction constraints and maximize the difference between ends of the user-set delay range, wherein the user-set delay range provides the outer limits of a programmed delay value. The method further includes presenting an input screen to the user on a user display device, wherein the input screen comprises user-set delay range input fields containing the initial seed values.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: July 19, 2016
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David J. Ternes, Keith L. Herrmann
  • 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
  • Publication number: 20150273218
    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: Application
    Filed: March 26, 2015
    Publication date: October 1, 2015
    Inventors: Holly E. Rockweiler, Sunipa Saha, Keith L. Herrmann, Yinghong Yu, Joel A. Krueger
  • 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
  • Publication number: 20150165204
    Abstract: Systems and methods for providing CRT therapy to a patient with an implanted multi-site pacing medical device. In one example, an intrinsic electrical delay associated with each of two or more left ventricle electrodes may be determined. The intrinsic electrical delay associated with each of the two or more left ventricle electrodes may be compared to an electrical delay threshold. If the electrical delay associated with one or fewer left ventricle electrodes is greater than the electrical delay threshold, a single left ventricle electrode may be selected for use during subsequent CRT therapy. If the electrical delay associated with more than one left ventricle electrode is greater than the electrical delay threshold, two or more of the left ventricle electrodes may be selected for use during subsequent CRT therapy.
    Type: Application
    Filed: December 18, 2014
    Publication date: June 18, 2015
    Inventors: Yinghong Yu, Keith L. Herrmann, Holly E. Rockweiler, Sunipa Saha, Benjamin J. Nyquist
  • Publication number: 20150165212
    Abstract: Systems and methods for efficiently determining one or more parameters for vectors of a multi-electrode implantable medical device, and for identifying one or more suitable vectors for sensing cardiac electrical data and/or delivering electrical stimulation therapy based on one or more of the determined parameters. Reducing the time required to determine the one or more parameters for each vector can help reduce procedure time for implanting and/or configuring an implantable medical device, which can reduce costs and/or improved patient comfort.
    Type: Application
    Filed: December 18, 2014
    Publication date: June 18, 2015
    Inventors: Sunipa Saha, Keith L. Herrmann, Yinghong Yu, David W. Yost, Holly E. Rockweiler