Robert J Dreher

US Patent:

7113824, Sep 26, 2006

Filed:

Nov 13, 2001

Appl. No.:

10/008367

Inventors:

David B. Krig - Brooklyn Park MN, US
James O. Gilkerson - Stillwater MN, US
Robert D. Dreher - Roseville MN, US
Jan D. Wald - Edina MN, US
William J. Linder - Golden Valley MN, US
William L. Zimmer - Roseville MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/39

US Classification:

607 14, 607 5, 600518

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

US Patent:

7522956, Apr 21, 2009

Filed:

Mar 7, 2005

Appl. No.:

11/073818

Inventors:

David B. Krig - Brooklyn Park MN, US
James O. Gilkerson - Stillwater MN, US
Robert D. Dreher - Roseville MN, US
Jan D. Wald - Edina MN, US
William J. Linder - Golden Valley MN, US
William L. Zimmer - Roseville MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/39

US Classification:

607 4

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

US Patent:

8306619, Nov 6, 2012

Filed:

Sep 27, 2011

Appl. No.:

13/246400

Inventors:

David B. Krig - Minneapolis MN, US
James O. Gilkerson - Stillwater MN, US
Robert D. Dreher - Roseville MN, US
Jan D. Wald - Edina MN, US
William J. Linder - Golden Valley MN, US
William L. Zimmer - Roseville MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/362

US Classification:

607 14

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

US Patent:

8046068, Oct 25, 2011

Filed:

Apr 20, 2009

Appl. No.:

12/386567

Inventors:

David B. Krig - Minneapolis MN, US
James O. Gilkerson - Stillwater MN, US
Robert D. Dreher - Roseville MN, US
Jan D. Wald - Edina MN, US
William J. Linder - Golden Valley MN, US
William L. Zimmer - Roseville MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/362

US Classification:

607 14

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

US Patent:

61515248, Nov 21, 2000

Filed:

Aug 18, 1999

Appl. No.:

9/376245

Inventors:

David B. Krig - Brooklyn Park MN
James O. Gilkerson - Stillwater MN
Robert D. Dreher - Roseville MN
Jan D. Wald - Edina MN
William J. Linder - Golden Valley MN
William L. Zimmer - Roseville MN

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1362

US Classification:

607 14

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

US Patent:

40631974, Dec 13, 1977

Filed:

Nov 12, 1976

Appl. No.:

5/741322

Inventors:

Robert Donald Dreher - Roseville MN

Assignee:

Control Data Corporation - Minneapolis MN

International Classification:

H03C 302

US Classification:

332 16T

Abstract:

A frequency modulation oscillator circuit is provided having three or more output frequencies corresponding to three or more possible input signals, the output frequency being a phase continuous frequency modulated signal with no discontinuities. For each desired output frequency, there is an input amplifier, responsive to an input binary signal, the output of that amplifier being summed with the outputs of the other amplifiers. For each input amplifier there is an active feedback network containing a delay element which will produce oscillation in the associated amplifier, the active feedback network from each amplifier being isolated from the other amplifiers and feedback networks. Input amplifiers comprising differential amplifiers emitter coupled to transistor switches are shown together with common base feedback amplifiers emitter coupled to the collectors of one of the transistors comprising the input differential amplifier.

US Patent:

63176327, Nov 13, 2001

Filed:

Oct 11, 2000

Appl. No.:

9/686585

Inventors:

David B. Krig - Brooklyn Park MN
James O. Gilkerson - Stillwater MN
Robert D. Dreher - Roseville MN
Jan D. Wald - Edina MN
William J. Linder - Golden Valley MN
William L. Zimmer - Roseville MN

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1262

US Classification:

607 14

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

US Patent:

59787074, Nov 2, 1999

Filed:

Oct 8, 1997

Appl. No.:

8/947256

Inventors:

David B. Krig - Brooklyn Park MN
James O. Gilkerson - Stillwater MN
Robert D. Dreher - Roseville MN
Jan D. Wald - Edina MN
William J. Linder - Golden Valley MN
William L. Zimmer - Roseville MN

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1362

US Classification:

607 14

Abstract:

A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.