1
Apurv Kamath, Paul Haefner, Darrell Orvin Wagner, Marina Brockway: Subcutaneous cardiac sensing and stimulation system employing blood sensor. Cardiac Pacemakers, Hollingsworth & Funk, November 27, 2007: US07302294 (71 worldwide citation)

Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection a ...


2
Eric G Lovett, Adam W Cates, Darrell Orvin Wagner, Mike Favet, Apurv Kamath: Subcutaneous cardiac rhythm management with asystole prevention therapy. Cardiac Pacemakers, Hollingsworth & Funk, August 4, 2009: US07570997 (53 worldwide citation)

Systems and methods provide for sensing of cardiac activity from a subcutaneous, non-intrathoracic location, and detecting a cardiac condition necessitating treatment in response to the sensed cardiac activity. One of a number of cardiac therapies may be selectively delivered to treat the detected c ...


3
Paul Haefner, Darrell Orvin Wagner, Jason Alan Shiroff, Marina Brockway, Apurv Kamath: Noise canceling cardiac electrodes. Cardiac Pacemakers, Hollingsworth & Funk, March 3, 2009: US07499750 (39 worldwide citation)

Implementing a subcutaneous medical electrode system involves positioning a number of electrode subsystems in relation to a heart so that noise cancellation provides an improved signal to noise ratio of the cardiac signal and/or to provide one electrode arrangement preferential for cardiac signals a ...


4
Apurv Kamath, Darrell Orvin Wagner, Paul Haefner, Marina Brockway: Biopotential signal source separation using source impedances. Cardiac Pacemakers, Hollingsworth & Funk, June 30, 2009: US07555335 (34 worldwide citation)

Cardiac methods and devices that separate signals using at least two composite signals acquired at least at two input impedances. A target source impedance may be selected, and a cardiac signal may be separated from composite signals using the selected target source impedance. Medical systems includ ...


5
Apurv Kamath, Ying Li: Systems and methods for processing analyte sensor data. DexCom, Knobbe Martens Olson & Bear, July 31, 2012: US08233959 (26 worldwide citation)

The present invention relates generally to systems and methods for measuring an analyte in a host. More particularly, the present invention relates to systems and methods for processing sensor data, including calculating a rate of change of sensor data and/or determining an acceptability of sensor o ...


6
Darrell O Wagner, Robert J Sweeney, Adam W Cates, Apurv Kamath, Eric G Lovett: Method and apparatus for assessing and treating atrial fibrillation risk. Cardiac Pacemakers, Schwegman Lundberg Woessner & Kluth P A, November 28, 2006: US07142912 (22 worldwide citation)

A method and apparatus for assessing the risk of atrial fibrillation in a patient by calculating the relative frequency of short and long intervals between successive heart beats during sinus rhythm is presented. An imbalance of short over long sinus intervals has been found to indicate a higher ris ...


7
Apurv Kamath, Paul Haefner, Darrell Orvin Wagner, Marina Brockway: Subcutaneous cardiac sensing and stimulation system employing blood sensor. Cardiac Pacemakers, Hollingsworth & Funk, September 20, 2011: US08024039 (2 worldwide citation)

Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection a ...


8
Kent Lee, Apurv Kamath: Ectopic beat detection algorithm for implantable cardiac rhythm management device. Cardiac Pacemakers, Nikolai & Mersereau P A, Thomas J Nikolai, January 30, 2007: US07171260 (2 worldwide citation)

A method implemented in a dual chamber cardiac rhythm management device for identifying non-sinus ventricular depolarizations following an atrial event. The PR interval for a sensed ventricular beat that occurs after either an atrial pace or an atrial sensed event is examined and if it falls into a ...


9
Apurv Kamath, James H Brauker, Aarthi Mahalingam, Ying Li: Systems and methods for replacing signal artifacts in a glucose sensor data stream. DexCom, Knobbe Martens Olson & Bear, February 2, 2016: US09247901 (1 worldwide citation)

Systems and methods for minimizing or eliminating transient non-glucose related signal noise due to non-glucose rate limiting phenomenon such as interfering species, ischemia, pH changes, temperatures changes, known or unknown sources of mechanical, electrical and/or biochemical noise, and the like. ...


10
Apurv Kamath, Ying Li, John Michael Dobbles, Aarthi Mahalingam: Systems and methods for processing analyte sensor data. DexCom, Knobbe Martens Olson & Bear, March 18, 2014: US08672845 (1 worldwide citation)

The present invention relates generally to systems and methods for measuring an analyte in a host. More particularly, the present invention relates to systems and methods for processing sensor data, including calculating a rate of change of sensor data and/or determining an acceptability of sensor o ...