Patents by Inventor Efdal Elferri

Efdal Elferri 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).

  • Respiratory parameters for arrhythmia detection and therapy
    Patent number: 8639324
    Abstract: An implantable or ambulatory medical device can include a cardiac signal sensing circuit configured to provide a sensed cardiac depolarization signal of a heart of a subject, a respiration sensing circuit configured to provide a signal representative of respiration of the subject, and a control circuit communicatively coupled to the cardiac signal sensing circuit and the respiration circuit. The control circuit includes a tachyarrhythmia detection circuit configured to determine heart rate using the depolarization signal, determine a respiration parameter of the subject using the respiration signal, calculate a ratio using the determined heart rate and the determined respiration parameter, generate an indication of tachyarrhythmia when the calculated ratio satisfies a specified detection ratio threshold value, and provide the indication of tachyarrhythmia to a user or process.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: January 28, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Efdal Elferri, Randall L. McPherson, Donald L. Hopper, Gary T. Seim, James O. Gilkerson, Dan Li, David L. Perschbacher
  • RESPIRATORY PARAMETERS FOR ARRHYTHMIA DETECTION AND THERAPY
    Publication number: 20120197323
    Abstract: An implantable or ambulatory medical device can include a cardiac signal sensing circuit configured to provide a sensed cardiac depolarization signal of a heart of a subject, a respiration sensing circuit configured to provide a signal representative of respiration of the subject, and a control circuit communicatively coupled to the cardiac signal sensing circuit and the respiration circuit. The control circuit includes a tachyarrhythmia detection circuit configured to determine heart rate using the depolarization signal, determine a respiration parameter of the subject using the respiration signal, calculate a ratio using the determined heart rate and the determined respiration parameter, generate an indication of tachyarrhythmia when the calculated ratio satisfies a specified detection ratio threshold value, and provide the indication of tachyarrhythmia to a user or process.
    Type: Application
    Filed: January 19, 2012
    Publication date: August 2, 2012
    Inventors: Efdal Elferri, Randall L. McPherson, Donald L. Hopper, Gary T. Seim, James O. Gilkerson, Dan Li, David L. Perschbacher