Patents by Inventor William L. Zimmer
William L. Zimmer 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).
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Patent number: 8364266Abstract: A method comprising providing a programmable non-volatile memory (PNVM) circuit fabricated together with a processor on an integrated circuit chip (IC) in an implantable medical device (IMD), partitioning the PNVM circuit into a plurality of portions based on how often that the processor accesses a portion, and selectively providing power or selectively restricting power to one or more of the portions according to how often that the processor accesses a portion.Type: GrantFiled: March 21, 2011Date of Patent: January 29, 2013Assignee: Cardiac Pacemakers, Inc.Inventors: Jeremy Maniak, William L. Zimmer, Ron A. Balczewski, William J. Linder
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Patent number: 8306619Abstract: 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.Type: GrantFiled: September 27, 2011Date of Patent: November 6, 2012Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Publication number: 20120016433Abstract: 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.Type: ApplicationFiled: September 27, 2011Publication date: January 19, 2012Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 8046068Abstract: 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.Type: GrantFiled: April 20, 2009Date of Patent: October 25, 2011Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Publication number: 20110172730Abstract: A method comprising providing a programmable non-volatile memory (PNVM) circuit fabricated together with a processor on an integrated circuit chip (IC) in an implantable medical device (IMD), partitioning the PNVM circuit into a plurality of portions based on how often that the processor accesses a portion, and selectively providing power or selectively restricting power to one or more of the portions according to how often that the processor accesses a portion.Type: ApplicationFiled: March 21, 2011Publication date: July 14, 2011Inventors: Jeremy Maniak, William L. Zimmer, Ron A. Balczewski, William J. Linder
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Patent number: 7937151Abstract: A system comprising an implantable medical device (IMD). The IMD includes a processor fabricated on an integrated circuit chip (IC), a random access memory (RAM) circuit fabricated on the same IC, and a programmable non-volatile memory (PNVM) circuit also fabricated on the same IC.Type: GrantFiled: March 2, 2006Date of Patent: May 3, 2011Assignee: Cardiac Pacemakers, Inc.Inventors: Jeremy Maniak, William L. Zimmer, Ron A. Balczewski, William J. Linder
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Publication number: 20090234400Abstract: 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.Type: ApplicationFiled: April 20, 2009Publication date: September 17, 2009Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 7522956Abstract: 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.Type: GrantFiled: March 7, 2005Date of Patent: April 21, 2009Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 7113824Abstract: 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.Type: GrantFiled: November 13, 2001Date of Patent: September 26, 2006Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Publication number: 20020107552Abstract: 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.Type: ApplicationFiled: November 13, 2001Publication date: August 8, 2002Applicant: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 6317632Abstract: 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.Type: GrantFiled: October 11, 2000Date of Patent: November 13, 2001Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 6151524Abstract: 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.Type: GrantFiled: August 18, 1999Date of Patent: November 21, 2000Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 5978707Abstract: 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.Type: GrantFiled: October 8, 1997Date of Patent: November 2, 1999Assignee: Cardiac Pacemakers, Inc.Inventors: David B. Krig, James O. Gilkerson, Robert D. Dreher, Jan D. Wald, William J. Linder, William L. Zimmer
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Patent number: 4773401Abstract: A multi-pole pacing/sensing lead is used to measure the instantaneous impedance in the right ventricle of a patient's heart. The resulting impedance waveform is signal processed to obtain a measure of the time interval beginning with the occurrence of a paced beat or a spontaneous QRS complex (systole marker) and ending with the point where the impedance versus time signal crosses the zero axis in the positive direction following the paced or spontaneous QRS complex initiating the interval or some other predetermined point along the positive-going waveform. The resulting time interval is inversely proportional to the contractility of the heart and is found to decrease with exercise and the introduction of catecholamines. Thus, it can be used as a control parameter for a demand-type cardiac pacemaker. A means for obviating changes in pacing rate due to long-term drift in the impedance sensing circuitry is also disclosed.Type: GrantFiled: August 21, 1987Date of Patent: September 27, 1988Assignee: Cardiac Pacemakers, Inc.Inventors: Brian P. Citak, Michael W. Dooley, Arthur L. Olive, Brian D. Pederson, Renold J. Russie, Rodney W. Salo, William L. Zimmer