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
Darrell Orvin Wagner, Paul Haefner: Subcutaneous cardiac stimulation system with patient activity sensing. Cardiac Pacemakers, Hollingsworth & Funk, October 3, 2006: US07117035 (35 worldwide citation)

A system includes a housing with energy delivery circuitry and detection circuitry. One or more electrodes are coupled to the circuitry and used to sense cardiac and muscle activity. A processor is coupled to the energy delivery and detection circuitry. The processor may detect a ventricular arrhyth ...


5
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 ...


6
Darrell Orvin Wagner, Adam W Cates, Curtis Charles Lindstrom: Patient stratification for implantable subcutaneous cardiac monitoring and therapy. Cardiac Pacemakers, Hollingsworth & Funk, May 16, 2006: US07047071 (26 worldwide citation)

Systems and methods of verifying that implantable cardiac devices operate as intended in a particular patient involve one or more of determining proper placement of system components, determining stimulus levels useful for individual patient stratification, and determining stimulus levels that indic ...


7
Darrell Orvin Wagner, Adam W Cates, Kristine M Larsen Kelly: Subcutaneous cardiac stimulator employing post-shock transthoracic asystole prevention pacing. Cardiac Pacemakers, Hollingsworth & Funk, June 24, 2008: US07392081 (11 worldwide citation)

Transthoracic cardiac stimulation therapies provide for detection and treatment of cardiac asystole subsequent to delivery of a defibrillation therapy. A pacing therapy is transthoracicly delivered to terminate detected cardiac asystole using residual energy from a defibrillation energy storage sour ...


8
Ron Heil, Darrell Orvin Wagner, Adam W Cates, Curtis Charles Lindstrom: Expandable fixation elements for subcutaneous electrodes. Cardiac Pacemakers, Hollingsworth & Funk, March 25, 2008: US07349742 (6 worldwide citation)

Subcutaneous systems and leads may be fixed in tissue after placement by use of one or more expanding fixation elements. An expanding fixation element is provided on an implantable lead and configured to secure one or both of a subcutaneous electrode and the lead body within subcutaneous non-intrath ...


9
Darrell Orvin Wagner, Adam W Cates, Curtis Charles Lindstrom: Electrode placement determination for subcutaneous cardiac monitoring and therapy. Cardiac Pacemakers, Hollingsworth & Funk, June 17, 2008: US07389138 (6 worldwide citation)

Methods and devices of cardiac electrode placement involve locating electrodes on a thorax of a patient. Surface pacing levels are determined relative to a pacing limit. Surface electrode locations are selected or rejected based on the level being within a limit. Electrodes may be relocated to new l ...


10
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 ...