1
Paul Haefner: Multi-parameter arrhythmia discrimination. Cardiac Pacemakers, Hollingsworth & Funk, May 15, 2007: US07218966 (73 worldwide citation)

An arrhythmia discrimination device and method involves receiving electrocardiogram signals and non-electrophysiologic signals at subcutaneous locations. Both the electrocardiogram-signals and non-electrophysiologic signals are used to discriminate between normal sinus rhythm and an arrhythmia. An a ...


2
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 ...


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
Paul Haefner: Subcutaneous cardiac signal discrimination employing non-electrophysiologic signal. Cardiac Pacemakers, Hollingsworth & Funk, January 4, 2011: US07865233 (36 worldwide citation)

A cardiac monitoring and/or stimulation system includes a housing coupled to a plurality of electrodes configured for subcutaneous non-intrathoracic sensing. A signal processor receives a plurality of composite signals associated with a plurality of sources, separates a signal from the plurality of ...


5
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 ...


6
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 ...


7
Scot C Boon, Mark Gryzwa, Michael Lyden, Qingsheng Zhu, Paul Haefner: Cardiac sense amplifier for capture verification. Cardiac Pacemakers, Nikolai & Mersereau P A, July 30, 2002: US06427085 (14 worldwide citation)

A cardiac rhythm management device having a capture verification sensing circuit for use in either a normal beat to beat pacing mode or an autothreshold mode. The cardiac rhythm management device is coupled to one or more pacing leads having pacing/sensing electrodes coupled thereto, and includes a ...


8
Paul Haefner: Multi-parameter arrhythmia discrimination. Cardiac Pacemakers, Hollingsworth & Funk, May 11, 2010: US07715916 (5 worldwide citation)

An arrhythmia discrimination device and method involves receiving electrocardiogram signals and non-electrophysiologic signals at subcutaneous locations. Both the electrocardiogram signals and non-electrophysiologic signals are used to discriminate between normal sinus rhythm and an arrhythmia. An a ...


9
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 ...


10
Apurv Kamath, Paul Haefner, Darrell O Wagner, Marina Brockway: Subcutaneous cardiac sensing and stimulation system. Cardiac Pacemakers, Schwegman Lundberg & Woessner P A, September 23, 2014: US08843196

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 ...