1
Robert S Kieval, Michael F Hess: Dual chamber pacing system and method with continual adjustment of the AV escape interval so as to maintain optimized ventricular pacing for treating cardiomyopathy. Medtronic, Michael B Atlass, Harold R Patton, May 6, 1997: US05626620 (214 worldwide citation)

A dual chamber pacemaker is provided having capability for adjusting the AV escape interval so as to optimize the timing of delivered ventricular pace pulses for therapy of patients with cardiomyopathy. The pacemaker system continually monitors to determine when a delivered pace pulse results in a f ...


2
Robert S Kieval, Michael F Hess: Dual chamber pacing system and method with continual adjustment of the AV escape interval so as to maintain optimized ventricular pacing for treating cardiomyopathy. Medtronic, Harold R Patton, Michael B Atlass, May 12, 1998: US05749906 (167 worldwide citation)

A dual chamber pacemaker is provided having capability for adjusting the AV escape interval so as to optimize the timing of delivered ventricular pace pulses for therapy of patients with cardiomyopathy. The pacemaker system continually monitors to determine when a delivered pace pulse results in a f ...


3
Robert S Kieval, Michael F Hess: Method and apparatus for dual chamber cardiac pacing. Medtronic, Harold R Patton, Michael B Atlass, April 16, 1996: US05507782 (116 worldwide citation)

A dual chamber pacemaker and a method of employing the pacemaker to accomplish atrial synchronized ventricular pacing with complete ventricular capture by control of the A-V escape intervals of the pacer. The maximum A-V escape interval effective to accomplish complete ventricular capture is determi ...


4
Michael F Hess, Michael R S Hill, John T Meador, R Hardwin Mead: Arrhythmia and fibrillation prevention pacemaker using ratchet up and decay modes of operation. Medtronic, Harold R Patton, Michael B Atlass, February 3, 1998: US05713929 (112 worldwide citation)

New pacing algorithm defines faster than indicated pacing rate during detection of PAC's/PVC's and reduces rate after awhile to a safety rate unless natural depolarizations are detected.


5
Robert S Kieval, Michael F Hess: Dual chamber pacing system and method with continual adjustment of the AV escape interval so as to maintain optimized ventricular pacing for treating cardiomyopathy. Medtronic, Harold R Patton, Michael B Atlass, February 10, 1998: US05716383 (107 worldwide citation)

A dual chamber pacemaker is provided having capability for adjusting the AV escape interval so as to optimize the timing of delivered ventricular pace pulses for therapy of patients with cardiomyopathy. The pacemaker system continually monitors to determine when a delivered pace pulse results in a f ...


6
John C Stroebel, Michael F Hess, H Toby Markowitz: Method and apparatus for variable rate cardiac stimulation. Medtronic, Harold R Patton, Michael B Atlass, March 10, 1998: US05725561 (102 worldwide citation)

A method and apparatus for variable rate cardiac stimulation, wherein sudden drops in the rate of delivery of stimulation pulses are avoided by means of rate smoothing and peak rate support functions. In one embodiment, circuitry in a cardiac pulse generator detects atrial events and maintains an up ...


7
Michael F Hess, H Toby Markowitz, James W Busacker: Adaptive search AV and auto PVARP adaptation to same with additional benefit. Medtronic, Harold R Patton, Michael B Atlass, January 19, 1999: US05861007 (99 worldwide citation)

An AV search method and apparatus is taught with some variation described. It allows a pacemaker to find the appropriate AV interval so as to avoid pacing in the ventricle when it is not necessary, even if there is intermittent AV conduction in the patient. Also, an adaptive PVARP method and apparat ...


8
Ursula Gebhardt, Michael F Hess: Use of accelerometer signal to augment ventricular arrhythmia detection. Medtronic, Michael C Soldner, Girma Wolde Michael, October 31, 2006: US07130681 (92 worldwide citation)

A system and method for detecting and discriminating atrial arrhythmias based on mechanical signals of cardiac wall motion and electrical signals of cardiac depolarizations. A mechanical event rate determined from sensed mechanical events is used to corroborate an electrical event rate determined fr ...


9
Weimin Sun, Eric Olson, John C Rueter, Michael F Hess: Medical device for automatic diagnosis of undersensing by timing. Medtronic, Michael A Atlass, Harold R Patton, October 10, 2000: US06129745 (80 worldwide citation)

There is provided a system and method applicable for use with a dual chamber pacemaker for determining whether long atrial intervals are due to atrial undersensing or to sick sinus syndrome. The determination of undersensing is based upon an algorithm which statistically analyzes a long atrial inter ...


10
Michael F Hess, Kathleen A Prieve: Atrial anti-arrhythmia pacemaker and method using high rate atrial and backup ventricular pacing. Medtronic, Reed A Duthler, Harold R Patton, July 27, 1999: US05928271 (73 worldwide citation)

An atrial and ventricular pacemaker including an atrial pulse generator having the capability of delivering high rate atrial pacing pulses for electrophysiologic study and having the capability of delivering ventricular pacing pulses as a backup, during delivery of high rate atrial pacing pulses. De ...