Tibor A Nappholz, William N Hursta, Albert K Dawson, Bruce M Steinhaus: Implantable ambulatory electrocardiogram monitor. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, May 19, 1992: US05113869 (763 worldwide citation)

An implanted programmable ambulatory electrocardiography (AECG) patient monitoring device that senses and analyzes electrocardiographic signals from at least one subcutaneous precordial sensor chronically and frequently to detect electrocardiogram and physiological signal characteristics predictive ...

Tibor A Nappholz, Peter Crosby: Cardiac stimulation system with enhanced communication and control capability. Pacesetter, Gottlieb Rackman & Reisman, February 24, 1998: US05720770 (316 worldwide citation)

A cardiac stimulation system is provided which delivers long term cardiac therapy without a personal supervision by a physician. The system includes a cardiac stimulation device implanted in a patient and an external device in constant or periodic communication with the cardiac device. The external ...

James A Nolan, Bruce M Steinhaus, Tibor A Nappholz: Leadless implantable sensor assembly and a cardiac emergency warning alarm. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, April 11, 1995: US05404877 (228 worldwide citation)

A leadless implantable cardiac arrhythmia alarm is disclosed which continuously assesses a patient's heart function to discriminate between normal and abnormal heart functioning and, upon detecting an abnormal condition, generates a patient-warning signal. The alarm is capable of sensing impedance m ...

Tibor A Nappholz, Mark Lubin, Harry L Valenta Jr: Metabolic-demand pacemaker and method of using the same to determine minute volume. Telectronics, Gottlieb Rackman & Reisman, October 27, 1987: US04702253 (226 worldwide citation)

A metabolic-demand pacemaker in which the standby rate is a function of minute volume. Electrodes are placed in a blood vessel in the vicinity of the patient's pleural cavity, a known current field is established in the blood, and the impedance in the field is measured. The impedance is a function o ...

Tibor A Nappholz, Harry L Valenta Jr, Steven M Maas, Ken Koestner: Method and apparatus for chronically monitoring the hemodynamic state of a patient using doppler ultrasound. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, February 23, 1993: US05188106 (212 worldwide citation)

A hemodynamic control apparatus and method for regulating blood flow within the cardiovascular system in a closed-loop control system using ultrasound measurement techniques to determine a hemodynamic status of the patient and to derive a control parameter for modulating the hemodynamics of the syst ...

Tibor A Nappholz, Albert K Dawson, Richard M T Lu, Bruce M Steinhaus: Apparatus and method for detecting abnormal cardiac rhythms using evoked potential measurements in an arrhythmia control system. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, February 9, 1993: US05184615 (200 worldwide citation)

In an implantable antiarryhythmia pacemaker, an automatic cardiac arrhythmia detection and classification monitoring apparatus and method for measuring stimulated intracardiac electrogram potentials, deriving therefrom a paced depolarization integral (PDI), analyzing time-based changes in the PDI, d ...

Tibor A Nappholz, John R Hamilton, James C Hansen: Minute volume rate-responsive pacemaker. Telectronics, Gottlieb Rackman & Reisman, February 20, 1990: US04901725 (142 worldwide citation)

A rate-responsive pacemaker whose rate control parameter is minute volume derived over a bipolar lead. An algorithm based on averaged samples and zero crossings provides enhanced accuracy. Sustained exercise at high pacing rates is possible.

Tibor A Nappholz, Saul E Greenhut, Albert K Dawson: Implantable cardiac stimulating apparatus and method employing detection of P-waves from signals sensed in the ventricle. Telectronics Pacing Systems, Gottlieb Rackman and Reisman, May 17, 1994: US05312445 (127 worldwide citation)

A P-wave detector in a single chamber ventricular cardiac pacemaker, which is adapted to perform VDD pacing, senses natural atrial activity in the form of P-waves from a standard lead implanted in the ventricle of the heart. The P-wave detector is electrically coupled to a ventricular sensing lead a ...

Tibor A Nappholz, Ken Koestner: Apparatus and method for detecting abnormal cardiac rhythms in dual chamber arrhythmia control system. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, November 10, 1992: US05161527 (122 worldwide citation)

A rate-responsive dual-chamber antitachycardia pacer and pacing method which automatically diagnoses and supports a patient's hemodynamic status by measuring metabolic demand and sensing intracardiac electrograms to determine whether the heart is beating normally or under conditions of bradycardia, ...

Tibor A Nappholz, Bruce Steinhaus, Chih ming James Chiang, Alan D Bernstein: Pacemaker programmer menu with selectable real or simulated implant data graphics. Pacesetter, Gottlieb Rackman & Reisman, February 3, 1998: US05713937 (114 worldwide citation)

A graphic user interface for a cardiac implant, such as an implant programmer, includes image generators for generating multiple images on a screen, each image corresponding to as representation of a parameter related to the operation of the implant or a cardiac function, and an indicia generator fo ...