Rahul D Mehra, Age 539200 Preston Pl, Edina, MN 55347

6488680, Dec 3, 2002

Apr 27, 2000

09/558975

David E. Francischelli - Anoka MN
Richard H. Comben - St. Paul MN
Michael F. Hoey - Shoreview MN
Rahul Mehra - Stillwater MN
Jon M. Ocel - New Birghton MN
Robert Pearson - Woodbury MN
Paul V. Trescony - Champlin MN
Scott E. Jahns - Hudson WI

Medtronic, Inc. - Minneapolis MN

A61B 1818

606 41, 606 47, 606 48, 606 51

A device for ablating tissue is provided. The device comprises a conductive element with a channel for irrigating fluid formed therein, which is in contact with a non-conductive microporous interface. All or a portion of the interface may be removable. When the interface is removed, a portion of the conductive element is exposed for use in ablating tissue. Methods of using the device and of removing the interface are also provided.

6572612, Jun 3, 2003

Oct 11, 2001

09/975789

Mark T. Stewart - Lino Lakes MN
William J. Flickinger - Lino Lakes MN
David E. Francischelli - Anoka MN
Rahul Mehra - Stillwater MN
Xiaoyi Min - Plymouth MN

Medtronic, Inc. - Minneapolis MN

A61B 1814

606 41, 607 99, 607113, 607122

A catheter assembly and method for treatment of cardiac arrhythmia, for example, atrial fibrillation, by electrically isolating a vessel, such as a pulmonary vein, from a chamber, such as the left atrium. The catheter assembly includes a catheter body and at least one electrode. The catheter body includes a proximal portion, an intermediate portion and a distal portion. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and forms a substantially closed loop transverse to the longitudinal axis. The at least one electrode is disposed along the loop. With this configuration, the loop is axially directed into contact with the chamber wall about the vessel ostium. Upon energization, the electrode ablates a continuous lesion pattern about the vessel ostium, thereby electrically isolating the vessel from the chamber.

6647291, Nov 11, 2003

Mar 31, 2000

09/540136

Matthew D. Bonner - Plymouth MN
Rahul Mehra - Stillwater MN

Medtronic, Inc. - Minneapolis MN

A61N 118

607 5, 607123

A method for cardioverting or defibrillating a human heart, performed by placing a transvenous lead having a cardioversion or defibrillation electrode such that the electrode is located at least partially within the middle cardiac vein of a patients heart and placing an additional cardioversion or defibrillation electrode in the superior vena cava of the patients heart and thereafter delivering a cardioversion or defibrillation pulse between the first and second electrodes. The method may be practiced by placing the transvenous such that the defibrillation electrode it carries extends around the apex of the patients heart, and the transvenous lead may be advanced through one cardiac vein toward the apex of the patients heart and thereafter advanced upward through a different cardiac vein.

6648883, Nov 18, 2003

Apr 24, 2002

10/132379

David E. Francischelli - Anoka MN
Mark T. Stewart - Lino Lakes MN
James R. Skarda - Lake Elmo MN
Rahul Mehra - Stillwater MN

Medtronic, Inc. - Minneapolis MN

A61B 1818

606 41, 606 27, 128898

A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the impedance of the tissue to be ablated. Rather than attempting to detect a desired drop or a desired increase impedance, completeness of a lesion is detected in response to the measured impedance remaining at a stable level for a desired period of time, referred to as an impedance plateau. The mechanism for determining transmurality of lesions adjacent individual electrodes or pairs may be used to deactivate individual electrodes or electrode pairs, when the lesions in tissue adjacent these individual electrodes or electrode pairs are complete, to create an essentially uniform lesion along the line of electrodes or electrode pairs, regardless of differences in tissue thickness adjacent the individual electrodes or electrode pairs.

6663627, Dec 16, 2003

Apr 24, 2002

10/132392

David E. Francischelli - Anoka MN
Eduardo N. Warman - Maple Grove MN
Rahul Mehra - Stillwater MN
Mark T. Stewart - Lino Lakes MN
James R. Skarda - Lake Elmo MN
Harry Puryear - Shoreview MN
David Schwartzman - Pittsburgh PA

Medtronic, Inc. - Minneapolis MN

A61B 1818

606 41, 606 34, 607122

A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the depolarization signal amplitude in a local electrogram taken using electrodes located adjacent the tissue to be ablated. Following onset of application of ablation energy to heart tissue, the amplitude of a local electrogram measured with electrodes located adjacent tissue to be ablated first gradually drops and then stabilizes, indicating that the tissue being monitored has ceased making any contribution to the sensed electrogram. The amplitude drop and/or the following amplitude plateau may be used alone or together as indicators of transmurality. Detection of a rapid drop in amplitude may be employed as an indicator that the ablation process is proceeding too quickly and may be employed to trigger a reduction in the power of applied ablation energy. Detection of an insufficiently rapid drop in amplitude may be employed as an indicator that the ablation process is proceeding too slowly and may be employed to trigger an increase in the power of applied ablation energy.

6728574, Apr 27, 2004

Oct 19, 2001

10/040147

Michael R. Ujhelyi - Maple Grove MN
Rahul Mehra - Stillwater MN

Medtronic, Inc. - Minneapolis MN

A61N 100

607 3

A pain management system that enables a patient to control pain associated with the application of electrical therapies by an implanted device that includes using a non-implanted drug delivery device. In an example embodiment, a pain management system includes an implanted medical device that detects an arrhythmia of a heart and telemetrically communicates from the implanted medical device an arrhythmia condition. The system also includes an external drug delivery arrangement that receives telemetric communications on the arrhythmia condition from the implanted device and provides an alert of the arrhythmia condition to the patient. The external drug delivery arrangement communicates to the implanted device that a drug is being administered to the patient. The implanted medical device includes a capacitive circuit that delivers the electrical therapy to the heart in response to the drug being administered.

6773433, Aug 10, 2004

Apr 16, 2003

10/414757

Mark T. Stewart - Lino Lakes MN
William J. Flickinger - Lino Lakes MN
David E. Francischelli - Anoka MN
Rahul Mehra - Stillwater MN
Xiaoyi Min - Plymouth MN

Medtronic, Inc. - Minneapolis MN

A61B 1814

606 41, 607 99, 607113, 607122

A catheter assembly and method for treatment of cardiac arrhythmia, for example, atrial fibrillation, by electrically isolating a vessel, such as a pulmonary vein, from a chamber, such as the left atrium. The catheter assembly includes a catheter body and at least one electrode. The catheter body includes a proximal portion, an intermediate portion and a distal portion. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and forms a substantially closed loop transverse to the longitudinal axis. The at least one electrode is disposed along the loop. With this configuration, the loop is axially directed into contact with the chamber wall about the vessel ostium. Upon energization, the electrode ablates a continuous lesion pattern about the vessel ostium, thereby electrically isolating the vessel from the chamber.

6804554, Oct 12, 2004

Oct 19, 2001

10/053035

Michael R. Ujhelyi - Maple Grove MN
Rahul Mehra - Stillwater MN
Nirav V. Sheth - Coon Rapids MN
Nancy Perry Pool - Minnetonka MN

Medtronic, Inc. - Minneapolis MN

A61N 130

607 6, 607 60, 607 62, 607 63

A patient-controlled system for temporarily disabling an electrical cardioverting therapy in order to prepare the patient psychologically and physiologically for the pain associated with electrical cardioversion therapy. In an example embodiment, the system includes a capacitive circuit capable of charging and discharging in order to apply the electrical therapy. The implanted medical device automatically causes the capacitive circuit to charge and discharge at least once within a selected period. The system includes a patient activator device that communicates with the implanted device. A disabling circuit is also included within the implanted medical device that temporarily disables the electrical therapy application in response to the patient activator device. The system further includes an alerting arrangement that alerts the patient activator device in response to the disabling circuit. An override circuit overrides the temporary disabling of the electrical therapy application in response to the patient being in a relaxed mode.