HUGH GROSVENOR CALKINS, M.D.
Osteopathic Medicine at Wolfe St, Baltimore, MD

2002008, Jun 27, 2002

Dec 26, 2000

09/748721

Jeffrey Stahmann - Ramsey MN, US
Andrew Kramer - Stillwater MN, US
Hugh Calkins - Baltimore MD, US

A61N001/362

607/009000

An apparatus and method for providing pacing pulses to a second site when the pacing pulses are inhibited from being provided to a first site. A first cardiac signal and a second cardiac signal are sensed, where both the first and second cardiac signals include indications of cardiac events. A cardiac rate is determined from the cardiac events in one of the first cardiac signal or the second cardiac signal, and pacing pulses are provided to the first cardiac region in order to maintain the cardiac rate at at least a minimum rate value. A pace protection interval starts when a cardiac event is detected in the first cardiac signal. The pace protection interval inhibits delivery of pacing pulses to the first cardiac region. When pacing pulses to the first cardiac region are inhibited because of the pace protection interval, pacing pulses are provided to the second cardiac region at a safety interval timed from the inhibited pacing pulse to the first cardiac region.

6963774, Nov 8, 2005

Nov 8, 2002

10/291459

Jeffrey E. Stahmann - Ramsey MN, US
Andrew P. Kramer - Stillwater MN, US
Hugh Calkins - Baltimore MD, US

Cardiac Pacemakers, Inc. - St. Paul MN

A61N001/362, A61N001/368

607 9, 607 18

An apparatus and method for providing pacing pulses to a second site when the pacing pulses are inhibited from being provided to a first site. A first cardiac signal and a second cardiac signal are sensed, where both the first and second cardiac signals include indications of cardiac events. A cardiac rate is determined from the cardiac events in one of the first cardiac signal or the second cardiac signal, and pacing pulses are provided to the first cardiac region in order to maintain the cardiac rate at at least a minimum rate value. A pace protection interval starts when a cardiac event is detected in the first cardiac signal. The pace protection interval inhibits delivery of pacing pulses to the first cardiac region. When pacing pulses to the first cardiac region are inhibited because of the pace protection interval, pacing pulses are provided to the second cardiac region at a safety interval timed from the inhibited pacing pulse to the first cardiac region.

8099151, Jan 17, 2012

Dec 22, 2005

11/314241

Henry R Halperin - Baltimore MD, US
Ronald D. Berger - Baltimore MD, US
Ergin Atalar - Columbia MD, US
Elliot R McVeigh - Potomac MD, US
Albert Lardo - Baldwin MD, US
Hugh Calkins - Baltimore MD, US
Joao Lima - Timonium MD, US

Johns Hopkins University School of Medicine - Baltimore MD

A61B 5/05

600423, 600410, 600424

A system and method for using magnetic resonance imaging to increase the accuracy of electrophysiologic procedures includes an invasive combined electrophysiology and imaging antenna catheter which includes an RF antenna for receiving magnetic resonance signals and diagnostic electrodes for receiving electrical potentials. The combined electrophysiology and imaging antenna catheter is used in combination with a magnetic resonance imaging scanner to guide and provide visualization during electrophysiologic diagnostic or therapeutic procedures, such as ablation of cardiac arrhythmias. The combined electrophysiology and imaging antenna catheter may further include an ablation tip, and be used as an intracardiac device to deliver energy to selected areas of tissue and visualize the resulting ablation lesions. The antenna utilized in the combined electrophysiology and imaging catheter for receiving MR signals is preferably of the coaxial or “loopless” type. High-resolution images from the antenna may be combined with low-resolution images from surface coils of the MR scanner to produce a composite image.

7822460, Oct 26, 2010

Oct 26, 2007

11/924877

Henry R. Halperin - Baltimore MD, US
Ronald D. Berger - Baltimore MD, US
Ergin Atalar - Columbia MD, US
Elliot R. McVeigh - Potomac MD, US
Albert Lardo - Baldwin MD, US
Hugh Calkins - Baltimore MD, US
Joao Lima - Timonium MD, US

Surgi-Vision, Inc. - Memphis TN

A61B 5/05, G01V 3/00

600411, 324307

A system and method for using magnetic resonance imaging to increase the accuracy of electrophysiologic procedures is disclosed. The system in its preferred embodiment provides an invasive combined electrophysiology and imaging antenna catheter which includes an RF antenna for receiving magnetic resonance signals and diagnostic electrodes for receiving electrical potentials. The combined electrophysiology and imaging antenna catheter is used in combination with a magnetic resonance imaging scanner to guide and provide visualization during electrophysiologic diagnostic or therapeutic procedures. The invention further provides a system for eliminating the pickup of RF energy in which intracardiac wires are detuned by filtering so that they become very inefficient antennas. An RF filtering system is provided for suppressing the MR imaging signal while not attenuating the RF ablative current. Steering means may be provided for steering the invasive catheter under MR guidance.

7058449, Jun 6, 2006

May 5, 2004

10/839268

Jeffrey E. Stahmann - Ramsey MN, US
Andrew P. Kramer - Stillwater MN, US
Hugh Calkins - Baltimore MD, US

Cardiac Pacemakers, Inc. - Saint Paul MN

A61N 1/368

607 17, 607 18, 607 9

Safety pacing in multi-site cardiac rhythm management (CRM) devices is provided. According to various method embodiments, a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region are sensed. The first cardiac region is paced to maintain at least a minimum cardiac rate, and the second cardiac region is paced to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited. Other aspects and embodiments are provided herein.

8260417, Sep 4, 2012

Nov 17, 2009

12/620312

Jeffrey E. Stahmann - Ramsey MN, US
Andrew P. Kramer - Marine on St. Croix MN, US
Hugh Calkins - Baltimore MD, US

Cardiac Pacemakers, Inc. - St. Paul MN

A61N 1/362

607 9, 607 17, 607 18

Safety pacing in multi-site cardiac rhythm management (CRM) devices is provided. According to various method embodiments, a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region are sensed. The first cardiac region is paced to maintain at least a minimum cardiac rate, and the second cardiac region is paced to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited. Other aspects and embodiments are provided herein.

7844319, Nov 30, 2010

Apr 15, 2002

10/123534

Robert C. Susil - Baltimore MD, US
Gwyneth Susil - Baltimore MD, US
Ergin Atalar - Bilkent, Ankara, TR
Albert C. Lardo - Baldin MD, US
Henry R. Halperin - Baltimore MD, US
Ronald D. Berger - Baltimore MD, US
Hugh Calkins - Baltimore MD, US
Paul Bottomley - Baltimore MD, US

A61B 5/055

600411, 600373, 600393, 600422, 600423, 606 32, 606 33, 606 46

Herein is disclosed a probe, including a first electrode disposed at least partially on the probe surface, a second electrode disposed at least partially on the probe surface, a first conductor electrically coupled to the first electrode, a second conductor electrically coupled to the second electrode, and a reactive element electrically coupling the first conductor and the second conductor.