Patents by Inventor Ruchir Sehra

Ruchir Sehra 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: 9668666
    Abstract: In a system and method for reconstructing cardiac activation information, an analysis cardiac signal and a reference cardiac signal are accessed and processed to determine a first point of change in the analysis cardiac signal at which a derivative of the analysis cardiac signal diverges with respect to a derivative of the reference cardiac signal. The signals are processed to determine a second point of change in the analysis cardiac signal at which a different derivative of the analysis cardiac signal with respect to a different derivative of the reference cardiac signal. An activation onset time is assigned in the analysis cardiac signal at a point based on a mathematical association of the first point of change and the second point of change to define cardiac activation indicating a beat in the analysis cardiac signal.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: June 6, 2017
    Assignees: The Regents of the University of California, Topera, Inc., The United States of America as Represented by the Department of Veterans Affairs
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Publication number: 20170049402
    Abstract: In a system and method for reconstructing cardiac activation information, an analysis cardiac signal and a reference cardiac signal are accessed and processed to determine a first point of change in the analysis cardiac signal at which a derivative of the analysis cardiac signal diverges with respect to a derivative of the reference cardiac signal. The signals are processed to determine a second point of change in the analysis cardiac signal at which a different derivative of the analysis cardiac signal with respect to a different derivative of the reference cardiac signal. An activation onset time is assigned in the analysis cardiac signal at a point based on a mathematical association among the first point of change and the second point of change to define cardiac activation indicating a beat in the analysis cardiac signal.
    Type: Application
    Filed: November 4, 2016
    Publication date: February 23, 2017
    Inventors: Sanjiv M. Narayan, Carey Robert Briggs, Ruchir Sehra
  • Patent number: 9560982
    Abstract: A method for sensing multiple local electric voltages from endocardial surface of a heart, includes: providing a system for sensing multiple local electric voltages from endocardial surface of a heart, including: a first elongate tubular member having a lumen, a proximal end and a distal end; a basket assembly including: a plurality of flexible splines for guiding a plurality of exposed electrodes, the splines having proximal portions, distal portions and medial portions therein between, wherein the electrodes are substantially flat electrodes and are substantially unidirectionally oriented towards a direction outside of the basket.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: February 7, 2017
    Assignee: Topera, Inc.
    Inventors: Thomas F. Kordis, Ruchir Sehra
  • Patent number: 9549684
    Abstract: Reconstruction of cardiac information representing a complex rhythm disorder is facilitated by assigning activation onsets to non-discernible beats in low confidence signals based upon time associations relative to activation onsets in adjacent high confidence signals.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: January 24, 2017
    Assignees: The Regents of the University of California, The United States of America as Represented by the Department of Veterans Affairs
    Inventors: Sanjiv Narayan, Ruchir Sehra
  • Publication number: 20160324430
    Abstract: An example system and method of defining a rotational source associated with a heart rhythm disorder are disclosed. A plurality of center locations of wave fronts are calculated at a plurality of time points associated with the heart rhythm disorder. A rotational path that connects the plurality of center locations is then determined. Thereafter, a clinical representation that identifies a region of heart tissue associated with the rotational path is generated. The system and method can also determine a likely core associated with the rotational path. A plurality of relative diffusion shapes associated with the plurality of the center locations is calculated. A plurality of intersecting points of a smallest relative diffusion shape and other relative diffusion shapes is determined within the rotational path. A bounded polygon of the intersecting points is defined as the likely core.
    Type: Application
    Filed: July 21, 2016
    Publication date: November 10, 2016
    Inventors: William Robert Macneil, Ruchir Sehra
  • Publication number: 20160278654
    Abstract: In a system and method for reconstructing cardiac activation information, an analysis cardiac signal and a reference cardiac signal are accessed and processed to determine a first point of change in the analysis cardiac signal at which a derivative of the analysis cardiac signal diverges with respect to a derivative of the reference cardiac signal. The signals are processed to determine a second point of change in the analysis cardiac signal at which a different derivative of the analysis cardiac signal with respect to a different derivative of the reference cardiac signal. An activation onset time is assigned in the analysis cardiac signal at a point based on a mathematical association of the first point of change and the second point of change to define cardiac activation indicating a beat in the analysis cardiac signal.
    Type: Application
    Filed: November 17, 2015
    Publication date: September 29, 2016
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Publication number: 20160235311
    Abstract: In a system and method for identifying a driver of a source associated with a heart rhythm disorder, data are accessed from a plurality of sensors representing biological activity in the heart. A first region and a second region of the heart, which comprise the source of the heart rhythm disorder, are identified. If the first region of the heart has repeating centrifugal activation and controls the second region of the heart for at least a predetermined number of beats, the first region is identified as controlling the source of the heart rhythm disorder.
    Type: Application
    Filed: April 22, 2016
    Publication date: August 18, 2016
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Patent number: 9398860
    Abstract: An example system and method of determining a likely core of a rotational source associated with a heart rhythm disorder are disclosed. A plurality of relative diffusion shapes associated with wave fronts is calculated at a plurality of time points associated with the rotational source. The wave fronts associated with heart signals. A plurality of intersecting points of a smallest relative diffusion shape and other relative diffusion shapes is determined. A bounded polygon of the intersecting points is defined as the likely core.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: July 26, 2016
    Assignee: Topera, Inc.
    Inventors: William Robert Macneil, Ruchir Sehra
  • Patent number: 9332915
    Abstract: In a system and method for identifying a driver of a source associated with a heart rhythm disorder, data are accessed from a plurality of sensors representing biological activity in the heart. A first region and a second region of the heart are identified as the source of the heart rhythm disorder. If the first region has repeating activation and controls the second region for at least a predetermined number of beats, the first region is identified as controlling the source of the heart rhythm disorder.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 10, 2016
    Assignees: The Regents of the University of California, Topera, Inc., The United States of America as Represented by the Department of Veterans Affairs, Office of the General Counsel
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Publication number: 20160095531
    Abstract: Reconstruction of cardiac information representing a complex rhythm disorder is facilitated by assigning activation onsets to non-discernible beats in low confidence signals based upon time associations relative to activation onsets in adjacent high confidence signals.
    Type: Application
    Filed: December 10, 2015
    Publication date: April 7, 2016
    Inventors: Sanjiv Narayan, Ruchir Sehra
  • Publication number: 20160022163
    Abstract: A system and method are provided for identifying a driver of a source associated with a heart rhythm disorder. Data are accessed from a plurality of sensors representing biological activity in the heart. A local first region of the heart that has repeating activation and determine whether the first region controls a second distant region of the heart for at least a predetermined number of beats is identified. The first local region is assigned as a driver of a source of the heart rhythm disorder, the source including the first local region and the second distant region.
    Type: Application
    Filed: March 14, 2014
    Publication date: January 28, 2016
    Inventors: Sanjiv NARAYAN, Carey Robert BRIGGS, Ruchir SEHRA
  • Patent number: 9241667
    Abstract: System, assembly and method are provided to facilitate reconstruction of cardiac information representing a complex rhythm disorder associated with a patient's heart to indicate a source of the heart rhythm disorder. The complex rhythm disorder can be treated by application of energy to modify the source of the rhythm disorder.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: January 26, 2016
    Assignees: The Regents of the University of California, Topera, Inc., The United States of America as Represented by the Department of Veterans Affairs, Office of General Counsel
    Inventors: Sanjiv Narayan, Ruchir Sehra
  • Publication number: 20160015283
    Abstract: A system and method are provided to define a driver of a source associated with a cardiac rhythm disorder of a human heart. A plurality of cardiac signals associated with sensors arranged spatially in relation to an area of the heart are processed to determine a sequence of arcs of rotation in relation to the sensors over a time interval. Rotational directions of the arcs of rotation in the sequence are determined. The area of the heart is identified as controlling the source when the rotational directions of the arcs of rotation in the sequence continue in a same rotational direction in excess of a threshold.
    Type: Application
    Filed: September 29, 2015
    Publication date: January 21, 2016
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Patent number: 9220427
    Abstract: In a system and method for reconstructing cardiac activation information, an analysis cardiac signal and a reference cardiac signal are processed to determine a first point of change in a derivative of the analysis cardiac signal with respect to a derivative of the reference cardiac signal. The analysis cardiac signal and the reference cardiac signal are processed to determine a second point of change in a different derivative of the analysis cardiac signal with respect to a different derivative of the reference cardiac signal. An activation onset time is assigned in the analysis cardiac signal at a point based on a mathematical association of the first point of change and the second point of change to define cardiac activation indicating a beat in the analysis cardiac signal.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 29, 2015
    Assignees: The Regents of the University of California, Topera, Inc., The United States of America as Represented by the Department of Veterans Affairs, Office of the General Counsel
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Publication number: 20150289807
    Abstract: System, assembly and method are provided to facilitate reconstruction of cardiac information representing a complex rhythm disorder associated with a patient's heart to indicate a source of the heart rhythm disorder. The complex rhythm disorder can be treated by application of energy to modify the source of the rhythm disorder.
    Type: Application
    Filed: June 12, 2015
    Publication date: October 15, 2015
    Inventors: Sanjiv Narayan, Ruchir Sehra
  • Patent number: 9089269
    Abstract: System, assembly and method are provided to facilitate reconstruction of cardiac information representing a complex rhythm disorder associated with a patient's heart to indicate a source of the heart rhythm disorder. The complex rhythm disorder can be treated by application of energy to modify the source of the rhythm disorder.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: July 28, 2015
    Assignees: The Regents of the University of California, Topera, Inc., The United States of America as Represented by the Department of Veterans Affairs, Office of General Counsel
    Inventors: Sanjiv Narayan, Ruchir Sehra
  • Publication number: 20150196212
    Abstract: In a system and method for reconstructing cardiac activation information, an analysis cardiac signal and a reference cardiac signal are processed to determine a first point of change in a derivative of the analysis cardiac signal with respect to a derivative of the reference cardiac signal. The analysis cardiac signal and the reference cardiac signal are processed to determine a second point of change in a different derivative of the analysis cardiac signal with respect to a different derivative of the reference cardiac signal. An activation onset time is assigned in the analysis cardiac signal at a point based on a mathematical association of the first point of change and the second point of change to define cardiac activation indicating a beat in the analysis cardiac signal.
    Type: Application
    Filed: March 26, 2015
    Publication date: July 16, 2015
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Patent number: 9050006
    Abstract: An example system and method of reconstructing cardiac activation information are disclosed. An analysis signal and a reference signal are processed to determine whether there is a first point of change in a first selected-order derivative of the analysis signal with respect to a first selected-order derivative of the reference signal above a first threshold. The analysis signal and the reference signal are processed to determine whether there is a second point of change in a second selected-order derivative of the analysis cardiac signal with respect to a second selected-order derivative of the reference cardiac signal above a second threshold. An activation onset time is assigned in the analysis cardiac signal at a point based on a mathematical association of the first point of change and the second point of change to define cardiac activation indicating a beat in the analysis cardiac signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 9, 2015
    Assignees: The Regents of the University of California, Topera, Inc.
    Inventors: Sanjiv Narayan, Carey Robert Briggs, Ruchir Sehra
  • Publication number: 20150133760
    Abstract: A system for sensing multiple local electric voltages from endocardial surface of a heart, includes: an elongate tubular member having a lumen, a proximal end and a distal end; and a basket assembly including a plurality of flexible splines; an anchor for securably affixing proximal portions of the splines, where the anchor is securably affixed within the lumen of the elongate tubular member at the distal end of the elongate tubular member; and a tip for securably affixing the distal portions of the splines; where the tip is recessed within the basket assembly upon radial expansion of the basket assembly.
    Type: Application
    Filed: January 13, 2015
    Publication date: May 14, 2015
    Applicant: Topera, Inc.
    Inventors: Thomas F. Kordis, Ruchir Sehra, Eric T. Johnson, Darrin J. Kent, Robert Ryan Ragland
  • Publication number: 20150073721
    Abstract: A system and method to process segments of cardiac signals. Each of a plurality of segments in a first signal is correlated at a plurality of offsets to determine a highest correlation coefficient for each of the plurality of segments in the first signal. Each of a plurality of segments in a second signal is correlated at the plurality of offsets to determine a highest correlation coefficient for each of the plurality of segments in the second signal. A plurality of composite correlation coefficients is generated using highest correlation coefficients for segments of the first signal and segments of the second signal. The segments of the first and second signals are approximately contemporaneous. A set of segments including a segment from the first signal and a segment from the second signal is selected. The set is associated with a highest composite correlation coefficient from the plurality of composite correlation coefficients.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 12, 2015
    Inventors: Carey Robert Briggs, Ruchir Sehra