1
Gust H Bardy, William J Rissmann, Alan H Ostroff, Paul J Erlinger, Venugopal Allavatam: Apparatus and method of arrhythmia detection in a subcutaneous implantable cardioverter/defibrillator. Cameraon Health, Crompton Seager & Tufte, June 22, 2004: US06754528 (230 worldwide citation)

In a subcutaneous implantable cardioverter/defibrillator, cardiac arrhythmias are detected to determine necessary therapeutic action. Cardiac signal information is sensed from far field electrodes implanted in a patient. The sensed cardiac signal information is then amplified and filtered. Parameter ...


2
Alan H Ostroff, Gary R Mezack: Switched capacitor defibrillation circuit. Cameron Health, Crompton Seager & Tufte, August 17, 2004: US06778860 (153 worldwide citation)

A defibrillator circuit for generating a rectangular waveform across a patient from capacitively stored energy and employing a plurality of capacitors initially chargeable to a common voltage and thereafter sequentially switchable into parallel relation with one another so as to raise the voltage su ...


3
Alan H Ostroff, William J Rissmann, Gust H Bardy: Method and apparatus for inducing defibrillation in a patient using a T-shock waveform. Cameron Health, Crompton Seager & Tufte, December 21, 2004: US06834204 (123 worldwide citation)

A shock is delivered on the T-wave of a patient's cardiac waveform by first detecting the occurrence of a QRS complex in the waveform and using that detection to set up for detection of the following T-wave. Narrowband filtering is used to first select the QRS complex and thereafter the T-wave, ...


4
Alan H Ostroff, Paul Erlinger, Gust H Bardy: Subcutaneous cardiac stimulator device having an anteriorly positioned electrode. Cameron Health, Crompton Seager & Tufte, December 12, 2006: US07149575 (118 worldwide citation)

A subcutaneous cardiac device includes a subcutaneous electrode and a housing coupled to the subcutaneous electrode by a lead with a lead wire. The subcutaneous electrode is adapted to be implanted in a frontal region of the patient so as to overlap a portion of the patient's heart.


5
Alan H Ostroff: Method and device for measuring subthreshold defibrillation electrode resistance and providing a constant energy shock delivery. Telectronics Pacing Systems, Gottlieb Rackman & Reisman, June 1, 1993: US05215081 (117 worldwide citation)

A method and apparatus for measuring subthreshold defibrillation electrode resistance are disclosed. A known subthreshold current pulse is sourced across the electrodes, the resulting voltage is measured and the electrode resistance is calculated from these values. The calculated electrode resistanc ...


6
William J Rissmann, Alan H Ostroff: H-bridge with sensing circuit. Cameron Health, Crompton Seager & Tufte, March 8, 2005: US06865417 (113 worldwide citation)

In a cardioverter/defibrillator system, an electrical circuit includes an energy storage device, an output circuit for controlling delivery of pulse therapy from the energy storage device to a patient, and a sensing circuit coupled across the patient to sense the patient's heart signal. The output c ...


7
Alan H Ostroff: Defibrillation pacing circuitry. Cameron Health, Crompton Seager & Tufte, October 4, 2005: US06952608 (99 worldwide citation)

Electrical circuit componentry is switchable into a defibrillator circuit to deliver a constant pacing current to a patient. The circuitry may include a constant current source inserted in a leg of the defibrillator circuit or a resistor of selected value inserted between a high voltage source and t ...


8
Alan H Ostroff, William J Rissmann, Gary P Mezack: Current waveforms for anti-tachycardia pacing for a subcutaneous implantable cardioverter- defibrillator. Cameron Health, Crompton Seager & Tufte, October 4, 2005: US06952610 (94 worldwide citation)

A power supply for an implantable cardioverter-defibrillator for subcutaneous positioning between the third rib and the twelfth rib and using a lead system that does not directly contact a patient's heart or reside in the intrathoracic blood vessels and for providing anti-tachycardia pacing energy t ...


9
Alan H Ostroff: Simplified defibrillator output circuit. Cameron Health, Crompton Seager & Tufte, October 11, 2005: US06954670 (93 worldwide citation)

High side driver circuitry for a defibrillator circuit employs respective capacitors connected to respective gates of silicon controlled rectifiers serving as high side switches. Applying a voltage pulse to a selected capacitor turns on the associated SCR. Positive turn-on of the high side SCRs is i ...


10
Gust H Bardy, Riccardo Cappato, Alan H Ostroff, William J Rissmann, Gary H Sanders: Subcutaneous cardiac stimulator with small contact surface electrodes. Cameron Health, Crompton Seager & Tufte, March 20, 2007: US07194302 (90 worldwide citation)

A subcutaneous cardiac device includes two electrodes and a stimulator that generates a pulse to the electrodes. The electrodes are implanted between the skin and the rib cage of the patient and are adapted to generate an electric field corresponding to the pulse, the electric field having a substan ...