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: 11504537
    Abstract: Systems and methods for monitoring chronic over-pacing (COP) to the heart are discussed herein. In an embodiment, a system includes a receiver circuit to receive information about pacing rates of a plurality of paced heart beats, and a pacing analyzer circuit to generate a pacing rate distribution using pacing rates of the plurality of the paced heart beats. The pacing rate distribution includes a pacing rate histogram. The pacing analyzer circuit may recognize a morphological pattern from the pacing rate distribution, and detect a COP indication using the extracted feature. A programmer circuit adjusts one or more therapy parameters in response to the detected. COP indication.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: November 22, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, James O. Gilkerson, Sunipa Saha, Deepa Mahajan
  • Patent number: 11491337
    Abstract: Systems and methods for managing machine-generated alert notifications of medical events detected from one or more patients are described herein. An embodiment of a data management system may receive an adjudication of a medical event episode including an episode characterization. A storage unit stores an association between one or more episode characterizations and corresponding detection algorithms for detecting a medical event having respective episode characterizations. An episode management circuit may detect from a subsequent episode, using the stored association, a medical event having an episode characterization of at least one medical event episode presented for adjudication, and schedule presenting at least a portion of the subsequent episode based on the detection.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: November 8, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Deepa Mahajan, David L. Perschbacher, Sunipa Saha
  • Patent number: 11471688
    Abstract: An example of a system includes an implantable medical device (IMD) for implantation in a patient, where the IMD includes a cardiac pace generator, phrenic nerve stimulation (PS) sensor, a memory, and a controller, and where the controller is operably connected to the cardiac pace generator to generate cardiac paces. The controller is configured to provide a trigger for conducting a PS detection procedure and perform the PS detection procedure in response to the trigger. In performing the PS detection procedure the controller is configured to receive a signal from the sensor, detect PS using the signal from the sensor, and record the PS detection in storage within the IMD.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: October 18, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Holly E. Rockweiler, Sunipa Saha, Aaron R. McCabe, Krzysztof Z. Siejko
  • Publication number: 20220280095
    Abstract: Systems and methods for managing cardiac arrhythmias are discussed. A data management system receives a first detection algorithm including a detection criterion for detecting a cardiac arrhythmia. An arrhythmia detector detects arrhythmia episodes from a physiologic signal using a second detection algorithm that is different from and has a higher sensitivity for detecting the cardiac arrhythmia than the first detection algorithm. The arrhythmia detector assigns a detection indicator to each of the detected arrhythmia episodes. The detection indicator indicates a likelihood that the detected arrhythmia episode satisfies the detection criterion of the first detection algorithm. The system prioritizes the detected arrhythmia episodes according to the assigned detection indicators, and outputs the arrhythmia episodes to a user or a process according to the episode prioritization.
    Type: Application
    Filed: May 23, 2022
    Publication date: September 8, 2022
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • Patent number: 11382552
    Abstract: An apparatus comprises an arrhythmia detection circuit configured to: receive a cardiac signal representative of cardiac activity of a subject; apply a first arrhythmia detection criteria to the received cardiac signal; apply, in response to the applied first arrhythmia detection criteria producing a positive indication of arrhythmia, a second arrhythmia detection criteria to the received cardiac signal, wherein the second arrhythmia detection criteria is more specific to detection of arrhythmia than the first detection criteria; detect, in response to the applied first and second arrhythmia detection criteria, a sensing event indicating one or both of the first and second arrhythmia detection criteria are susceptible to false indications of arrhythmia; and adjust, in response to a detected sensing event, sensitivity or specificity of one or both of the first and second arrhythmia detection criteria.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: July 12, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • Patent number: 11357441
    Abstract: Systems and methods for managing cardiac arrhythmias are discussed. A data management system receives a first detection algorithm including a detection criterion for detecting a cardiac arrhythmia. An arrhythmia detector detects arrhythmia episodes from a physiologic signal using a second detection algorithm that is different from and has a higher sensitivity for detecting the cardiac arrhythmia than the first detection algorithm. The arrhythmia detector assigns a detection indicator to each of the detected arrhythmia episodes. The detection indicator indicates a likelihood that the detected arrhythmia episode satisfies the detection criterion of the first detection algorithm. The system prioritizes the detected arrhythmia episodes according to the assigned detection indicators, and outputs the arrhythmia episodes to a user or a process according to the episode prioritization.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: June 14, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • Patent number: 11298068
    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: Grant
    Filed: December 6, 2019
    Date of Patent: April 12, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Deepa Mahajan, Sunipa Saha
  • Publication number: 20220095983
    Abstract: Systems and methods for detecting cardiac arrhythmia are discussed. A medical-device system includes an arrhythmia detector circuit and an event prioritizer circuit. The arrhythmia detector circuit can detect an atrial activation event from a cardiac electrical signal sensed from the patient, and determine an atrial fibrillation (AF) confidence indicator based on a signal characteristic of the atrial activation event. The event prioritizer circuit can generate an event priority for the AF event based on the AF confidence indicator. Multiple AF events may be prioritized in a specific order and presented to a user or a process.
    Type: Application
    Filed: September 29, 2021
    Publication date: March 31, 2022
    Inventors: Deepa Mahajan, David L. Perschbacher, Sunipa Saha, Abhijit Rajan
  • Patent number: 11289202
    Abstract: Described herein are systems and methods for classifying clinical episodes in order to more accurately generate alerts for those episodes that warrant them. In some embodiments, alerts are only generated for those episodes that are new or different from previous episodes, where the previous episodes have been found to be not significant enough to warrant an alert.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: March 29, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Deepa Mahajan, Bhaskar Sen, Sunipa Saha, David L. Perschbacher
  • Patent number: 11213242
    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: Grant
    Filed: September 6, 2019
    Date of Patent: January 4, 2022
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Krzysztof Z. Siejko, David L. Perschbacher, Sunipa Saha
  • Patent number: 11207536
    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: Grant
    Filed: January 8, 2020
    Date of Patent: December 28, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: David L. Perschbacher, Sunipa Saha, Deepa Mahajan
  • Patent number: 11202599
    Abstract: Systems and methods for ambulatory detection of medical events such as cardiac arrhythmia are described herein. An embodiment of an arrhythmia detection system may include a detection criterion circuit that determines a patient-specific detection criterion using a baseline cardiac characteristic when the patient is free of cardiac arrhythmias. The detection criterion circuit generates a patient-specific threshold of a signal metric by adjusting a population-based threshold of the signal metric, where the manner and the amount of adjustment is based on information about patient baseline cardiac characteristic. The arrhythmia detection system detects an arrhythmia episode using a physiologic signal sensed from the patient and the patient-specific arrhythmia detection threshold.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: December 21, 2021
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Sunipa Saha, David L. Perschbacher, Deepa Mahajan
  • 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: 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
  • 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
  • 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