1
George J Klein, Dwight H Warkentin, Kenneth M Riff, Brian B Lee, James K Carney, Gregg Turi, Anthony J Varrichio: Minimally invasive implantable device for monitoring physiologic events. Medtronic, Harold R Patton, Michael B Atlass, November 16, 1999: US05987352 (542 worldwide citation)

A minimally invasive implant, means for insertion, and description of how to most efficiently use it are described n several embodiments. This implant preferably has a segmented looping memory for storing triggered physiologic events. Preferred events for setting autotriggers to record physiologic s ...


2
Kenneth M Riff: Impedance monitor for discerning edema through evaluation of respiratory rate. Medtronic, Harold R Patton, Michael B Atlass, March 2, 1999: US05876353 (378 worldwide citation)

An impedance monitor for discerning edema through evaluation of respiratory rate. Preferred embodiment includes edema monitor and trigger to initiate diagnostic reporting or corrective action when activated. Recording of Long Term Average and Short Term Average values for secondary edema measure bas ...


3
Kenneth M Riff: Intravascular pressure posture detector. Medtronic, August 20, 1991: US05040536 (232 worldwide citation)

Apparatus and method for detecting changes in the posture of a patient. Two pressure sensors are chronically implanted at different places in the cardiovascular system. One may be positioned in the right heart, for example, and the other placed in the inferior vena cava. The positioning is selected ...


4
Robert S Kieval, Kenneth M Riff: Implantable medical device for tracking patient cardiac status. Medtronic, Michael B Atlass, Harold R Patton, February 20, 2001: US06190324 (175 worldwide citation)

An implantable medical device determines activity levels and Heart Rate and from a combination of these produces a value for a heart rate activity coefficient (HRAC). This value has significant diagnostic and patient tracking value. Methods and apparatus for determining this HRAC value are described ...


5
Michael B Shelton, William J Combs, Tommy D Bennett, Michael R Tollinger, Kenneth M Riff: Rate responsive cardiac pacemaker and method for work-modulating pacing rate deceleration. Medtronic, Reed A Duthler, Harold R Patton, May 17, 1994: US05312453 (121 worldwide citation)

A rate-responsive cardiac pacemaker in which deceleration of the pacing rate is modulated according to recent patient activity or "work". Based on signals provided from an activity sensor in the pacemaker, the pacemaker maintains and periodically recomputes a work value corresponding to the amount o ...


6
Kenneth M Riff, Ray S McDonald, Michael J German: Method and apparatus for intracardiac electrogram morphologic analysis. Medtronic, Reed A Duthler, Harold R Patton, October 4, 1994: US05351696 (53 worldwide citation)

A method and apparatus for morphologic analysis of an electrical signal, implementable in an implantable device such as a pacemaker, cardioverter, defibrillator or the like. The morphologic analysis uses a phase plane representation of the signal, where the signal and its first derivative are plotte ...


7
Kenneth M Riff, Gregory J Linden, Kurt R Smith: Medical device systems implemented network scheme for remote patient management. Medtronic, March 23, 2010: US07685005 (52 worldwide citation)

A system and method for computer enabled network patient management of medical devices used in chronic disease management. Utilizing web site and push alert notification of alert level physiologic data derived via analysis of continuous stream wireless data transmissions from a patient, a full cycle ...


8
Michael B Shelton, Kenneth M Riff: Pacemaker with vasovagal snycope detection. Medtronic, Harold R Patton, Michael B Atlass, July 30, 1996: US05540728 (45 worldwide citation)

A method and apparatus of cardiac pacing, in which pacing at an increased rate is provided in response to a detected rapid drop in detected heart rate, to a stable rate below a defined threshold rate.


9
Michael B Shelton, Kenneth M Riff, Michael F Hess: Pacemaker with vasovagal syncope detection. Medtronic, Harold R Patton, August 15, 1995: US05441525 (42 worldwide citation)

A rate-responsive cardiac pacemaker implements a novel scheme which detects incipient vasovagal syncope (or other episodes caused by a vasodepressive or cardioinhibitory disorder) when a) the heart rate drops below a programmable minimum size, and b) the rate after said drop is below a programmable ...


10
Robert S Kieval, Kenneth M Riff: Implantable medical device for tracking patient cardiac status. Medtronic, Girma Wolde Michael, March 4, 2003: US06529771 (39 worldwide citation)

An implantable medical device determines activity levels and Heart Rate and from a combination of these produces a value for a heart rate activity coefficient (HRAC). This value has significant diagnostic and patient tracking value. Methods and apparatus for determining this HRAC value are described ...