Patents by Inventor Sunipa Saha

Sunipa Saha 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: 11116439
    Abstract: Systems and methods for detecting slow and persistent rhythms, such as indicative of ventricular response to atrial tachyarrhythmia (AT), are described herein. An arrhythmia detection system monitors patient ventricular heart rate, and identifies slow heart beats with corresponding heart rates falling below a rate threshold during a detection period. The system identifies one or more sustained slow beat (SSB) sequences each including two or more slow heart beats. The system determines a first prevalence indicator of the identified slow heart beats, and a second prevalence indicator of the identified SSB sequences during the detection period. An arrhythmia detector circuit detects a slow and persistent rhythm using the first and second prevalence indicators.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: September 14, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • Patent number: 11089958
    Abstract: Systems and methods for managing machine-generated medical events detected from one or more patients are described herein. A medical event management system includes an event analyzer circuit to detect a medical event using physiological data from a patient-triggered episode acquired from a medical device. The event analyzer circuit determines a confidence score of the medical event detection, and generates an alignment indicator indicating a degree of concordance between the detected medical event and the information about the patient-triggered episode. The system assigns priority information to the patient-triggered episode using the generated alignment indicator and the confidence score of the detection. An output circuit can output the received physiological information to a user or a process according to the assigned priority information.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: August 17, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Amy Jean Brisben, Qi An, Pramodsingh Hirasingh Thakur, David J. Ternes, JoAnna Trapp Simpson, Viktoria A. Averina, Deepa Mahajan, Sunipa Saha, Krzysztof Z. Siejko
  • Patent number: 11026619
    Abstract: A cardiac rhythm management system includes at least one sensing component configured to obtain a first physiological parameter signal, an indication of a cardiac response to a stimulation therapy, and temporal information corresponding to the first physiological parameter signal and the cardiac response; and at least one processor configured to: receive the first physiological parameter signal, the indication of the cardiac response, and the temporal information; and to classify the cardiac response into a first cardiac response class to generate a classified cardiac response. The at least one processor also is configured to determine a correlation, based on the temporal information, between the first physiological parameter signal and the classified cardiac response.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: June 8, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David J. Ternes, Qi An, Pramodsingh H. Thakur, Keith R. Maile, Sunipa Saha
  • Publication number: 20210030295
    Abstract: Systems and methods for calibrating an orientation of an implantable device in a patient is described. An exemplary system includes a calibration circuit that can receive acceleration information sensed from an implantable medical device (IMD) implanted in a patient, and receive reference acceleration information sensed from a reference device associated with the patient. The acceleration information and the reference acceleration information are acquired when the patient assumes a first posture or in a first position. The calibration circuit determines a spatial relationship between an orientation of the IMD and a reference orientation of the reference device using the received acceleration information and the received reference acceleration information, and calibrate subsequent acceleration information sensed from the IMD using the determined spatial relationship to correct for the orientation of the IMD.
    Type: Application
    Filed: July 27, 2020
    Publication date: February 4, 2021
    Inventors: Jonathan Bennett Shute, John D. Hatlestad, Sunipa Saha, David L. Perschbacher
  • Patent number: 10881317
    Abstract: An apparatus comprises an arrhythmia detection circuit configured to: detect atrial arrhythmia in a first portion of a sensed cardiac signal using a first arrhythmia detection criteria, wherein the sensed cardiac signal is representative of cardiac activity of a subject; and upon detection of the atrial arrhythmia, analyze a second portion of the cardiac signal that is prior in time to the first portion using a second different arrhythmia detection criteria to detect the presence or absence of the atrial arrhythmia in the second portion of the cardiac signal.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: January 5, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha
  • Publication number: 20200323459
    Abstract: This document discusses, among other things, systems and methods to detect an initial arrhythmia event indication and, after a threshold amount of detection window intervals detecting the initial arrhythmia event indication, adjust a set of arrhythmia parameters or at least one of a respective set of parameter thresholds to increase sensitivity of an extended arrhythmia event indication detection.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 15, 2020
    Inventors: Sunipa Saha, David L. Perschbacher, Deepa Mahajan
  • Publication number: 20200323452
    Abstract: This document discusses, among other things, systems and methods to receive cardiac electrical information and premature ventricular contraction (PVC) information of a subject, detect atrial fibrillation (AF) of the subject using the received cardiac electrical information, and adjust AF detection using the received PVC information.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 15, 2020
    Inventors: Deepa Mahajan, David L. Perschbacher, Sunipa Saha
  • Patent number: 10786172
    Abstract: Systems and methods for detecting atrial arrhythmias such as atrial tachyarrhythmia (AT) are described herein. An AT detection system may include a heart rate detector circuit configured to detect, from a physiological signal, representative ventricular heart rates within heart rate analysis windows. An atrial tachyarrhythmia detector circuit may perform an initial rate detection using a first ventricular heart rate statistic generated from the representative ventricular heart rates, and to perform a sustained arrhythmia detection using one or more second ventricular heart rate statistics generated within a second plurality of heart rate analysis windows during a specific duration. An AT event is detected if the second ventricular heart rate statistics satisfy a specific condition throughout the specific duration. The AT detection system may include an output unit that may output the detected AT to a user or a process.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: September 29, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha
  • Publication number: 20200288997
    Abstract: Systems and methods for detecting cardiac arrhythmia are discussed. An exemplary medical-device system includes an arrhythmia detector circuit that receives physiologic information, including respiration and heart beat information a patient, and determines whether a respiratory sinus arrhythmia (RSA) is present or absent using the respiration and the heart beat information. An indication of the presence or absence of RSA may be stored in a memory. The arrhythmia detector circuit can detect an AT episode using the indication of RSA.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 17, 2020
    Inventors: Jonathan Bennett Shute, Sunipa Saha, Pramodsingh Hirasingh Thakur
  • Patent number: 10765379
    Abstract: Systems and methods for managing machine-generated medical alerts associated with physiological events detected from one or more patients are described herein. An alert management system may receive medical events detected from a patient and physiological data associated with patient historical medical alerts. The system comprises an alert prioritizer circuit to generate an event priority indicator for the detected medical event, using a comparison between the detected medical event and the physiological data associated with patient historical medical alerts. The system can identify prolific alert patients using the information about the historical medical alerts. The alert prioritizer circuit can adjust a priority of the detected medical event, and an output circuit can present a priority to a user or a process using the event priority indicator and the identification of prolific alert patient.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: September 8, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha, JoAnna Trapp Simpson, Keith Mattson
  • 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
  • Publication number: 20200215344
    Abstract: An example of a system may include a sensing circuit and an atrial fibrillation (AF) detection circuit. The sensing circuit may be configured to sense a cardiac signal indicative of atrial and ventricular depolarizations. The AF detection circuit may be configured to detect AF using the cardiac signal and may include a detector and a detection enhancer. The detector may be configured to detect the ventricular depolarizations using the cardiac signal, to measure ventricular intervals each between two successively detected ventricular depolarizations, and to detect the AF using the ventricular intervals. The detection enhancer may include a respiratory sinus arrhythmia (RSA) detector configured to detect RSA using the cardiac signal and may be configured to verify each detection of the AF based on whether the RSA is detected.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 9, 2020
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • Patent number: 10702180
    Abstract: This document discusses, among other things, apparatus, systems, and methods to determine a first atrial fibrillation (AF) indication using received information about a heart over a first period, to cluster depolarization information about the heart over the first period, and to discriminate between an atrial fibrillation (AF) event and a non-AF event in the first period using the determined first AF indication the clustered depolarization information.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: July 7, 2020
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • 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
  • Publication number: 20200178826
    Abstract: Systems and methods for detecting cardiac arrhythmia are discussed. An exemplary arrhythmia detection system can receive physiologic information of the patient, measure a first signal metric using a first portion of the received physiologic information, and determine an arrhythmia detection duration using a comparison between the measured first signal metric and a reference signal metric value. The system includes an arrhythmia detector to detect an AT episode using a second portion of the physiologic information corresponding to the determined arrhythmia detection duration.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 11, 2020
    Inventors: Deepa Mahajan, David L. Perschbacher, Sunipa Saha
  • Publication number: 20200178829
    Abstract: Systems and methods for detecting cardiac arrhythmias such as atrial tachyarrhythmia (AT) are discussed. An exemplary system includes a ventricular beat analyzer circuit to detect ventricular beats and assess ventricular activity, such as to evaluate a ventricular rate stability. The system includes an arrhythmia detector circuit to detect respective AT indications in distinct time periods using portions of received physiologic information during the distinct time periods. A control circuit can monitor the ventricular beats on a beat-by-beat basis, in response to the detected ventricular beats satisfying an instability condition, trigger AT detections during the distinct time periods and withhold AT detection in a subsequent time period if no AT is detected in the present time period. An AT characteristic may be generated using the detected AT indications. A therapy may be delivered in accordance with the AT characteristic.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 11, 2020
    Inventors: David L. Perschbacher, Deepa Mahajan, Sunipa Saha
  • 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
  • Patent number: 10595739
    Abstract: An anatomical mapping system including a plurality of mapping electrodes disposed in or near an anatomical structure and configured to detect activation signals of physiological activity, each of the plurality of mapping electrodes having an electrode location, and a processing system associated with the plurality of mapping electrodes, and configured to record the detected activation signals and associate one of the plurality of mapping electrodes with each recorded activation signal. The processing system further configured to determine a dominant frequency at each electrode location, and determine a wavefront vector at each electrode location based on a difference between the dominant frequency at a first electrode location and the dominant frequency at neighboring electrode locations.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: March 24, 2020
    Assignee: Boston Scientific Scimed Inc
    Inventors: Pramodsingh Hirasingh Thakur, Shibaji Shome, Allan C. Shuros, Shantha Arcot-Krishnamurthy, Barun Maskara, Sunipa Saha
  • 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
  • Patent number: 10555680
    Abstract: A method and system for mapping an anatomical structure includes sensing activation signals of intrinsic physiological activity with a plurality of mapping electrodes disposed in or near the anatomical structure, each of the plurality of mapping electrodes having an electrode location. A vector field map which represents a direction of propagation of the activation signals at each electrode location is generated to identify a signature pattern and a location in the vector field map according to at least one vector field template. A target location of the identified signature pattern is identified according to a corresponding electrode location.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: February 11, 2020
    Assignee: Boston Scientific Scimed Inc.
    Inventors: Pramodsingh H. Thakur, Shibaji Shome, Shantha Arcot-Krishnamurthy, Allan C. Shuros, Barun Maskara, Sunipa Saha