1
Henry R Halperin, Ronald D Berger, Ergin Atalar, Elliot R McVeigh, Albert Lardo, Hugh Calkins, Joao Lima: Magnetic-resonance-guided imaging, electrophysiology, and ablation. Johns Hopkins University School of Medicine, Foley Hoag, March 2, 2004: US06701176 (232 worldwide citation)

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 res ...


2
Henry R Halperin, Ronald D Berger: CPR chest compression monitor. The Johns Hopkins University, K David Crockett Esq, Crockett & Crockett, May 21, 2002: US06390996 (178 worldwide citation)

Chest compressions are measured and prompted to facilitate the effective administration of CPR. A displacement detector produces a displacement indicative signal indicative of the displacement of the CPR recipient's chest toward the recipient's spine. A signaling mechanism provides chest c ...


3
Henry R Halperin, Ronald D Berger, Ergin Atalar, Elliot R McVeigh, Albert Lardo, Hugh Calkins, Joao Lima: System and method for magnetic-resonance-guided electrophysiologic and ablation procedures. Johns Hopkins University School of Medicine, Nixon & Vanderhye P C, December 26, 2006: US07155271 (152 worldwide citation)

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 res ...


4
James Adam Palazzolo, Ronald D Berger, Henry R Halperin, Darren R Sherman: Method of determining depth of compressions during cardio-pulmonary resuscitation. Revivant Corporation, K David Crockett Esq, Theodore D Fay III Esq, Crockett & Crockett, December 7, 2004: US06827695 (122 worldwide citation)

A method of processing a raw acceleration signal, measured by an accelerometer-based compression monitor, to produce an accurate and precise estimated actual depth of chest compressions. The raw acceleration signal is filtered during integration and then a moving average of past starting points esti ...


5
Ronald D Berger: Methodology for automated QT variability measurement. Henderson & Sturm, October 1, 1996: US05560368 (104 worldwide citation)

A method for analyzing electrocardiograph signals to determine risk of malignant arrhythmias, that involves: sensing fluctuations in voltage resulting from electrical activity of a heart over a time period of about 256 seconds as signals having an analog value; converting such signals having an anal ...


6
Ronald D Berger: Cardiac shock electrode system and corresponding implantable defibrillator system. The Johns Hopkins University, Nixon & Vanderhye P C, October 14, 2003: US06633780 (101 worldwide citation)

An implantable cardioverter defibrillator (ICD) system includes an internal electrode placed in the right ventricle of the heart, and a flexible array (that includes a plurality of electrodes) placed over a significant portion of the heart. Defibrillation shocks are applied between the internal elec ...


7
Henry R Halperin, Ronald D Berger, Ergin Atalar, Elliot R McVeigh, Albert Lardo, Hugh Calkins, Joao Lima: MRI-guided therapy methods and related systems. Surgi Vision, Frommer Lawrence & Haug, Bruce E Black, October 26, 2010: US07822460 (95 worldwide citation)

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 res ...


8
John D Hummel, Ronald D Berger: Intracardiac ablation and mapping catheter. Henderson & Sturm, September 3, 1996: US05551426 (87 worldwide citation)

An assembly of preformed curved enamel-coated ablative tipped endocardial electrodes are housed inside an outer sheath in a preformed geometric arrangement for insertion into heart chambers and application onto the endocardial surface of the heart. The position of the electrodes relative to each oth ...


9
Ronald D Berger, Jerome P Saul, Ming H Chen, Richard J Cohen: Method and apparatus for the assessment of autonomic response by broad-band excitation. Massachusetts Institute of Technology, October 18, 1988: US04777960 (71 worldwide citation)

A rapid, noninvasive technique for quantifying the dynamic response of the autonomic nervous system (ANS) to perturbations it senses over a broad range of physiologically relevant frequencies. The technique involves two steps. First, a physiologic parameter sensed by the ANS is subjected to a broad- ...


10
Robert C Susil, Gwyneth Susil, Ergin Atalar, Albert C Lardo, Henry R Halperin, Ronald D Berger, Hugh Calkins, Paul Bottomley: Systems and methods for magnetic-resonance-guided interventional procedures. November 30, 2010: US07844319 (67 worldwide citation)

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 electro ...