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US 9,283,398 B2Granted
Defibrillation pacing circuitry
AssigneeCameron Health, Inc.
InventorAlan H. Ostroff
Life of this patent
Estimating the term…
Abstract
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 the high side of a defibrillator circuit.
Claims12
An implantable apparatus for delivering electrical cardiac therapy to a patient, the implantable apparatus comprising:
- power circuitry for creating a cardiac therapy signal, the power circuitry including a capacitive circuit chargeable to create the cardiac therapy signal;
- an H-bridge circuit for delivering the cardiac therapy signal from the power circuitry to the patient, the H-bridge circuit comprising at least first and second legs each having high and low sides;
- current controlling circuitry coupled to the H-bridge circuit for selectively controlling current passing through the H-Bridge;
- and
- an implantable housing containing each of the power circuitry, H-Bridge Circuit, and current controlling circuitry;
- wherein the implantable apparatus is configured to use at least:
- a first configuration in which the current controlling circuitry modifies the cardiac therapy signal to provide a generally constant current signal to the patient, and
- a second configuration in which the current controlling circuitry does not substantially modify the cardiac therapy signal so that the power circuitry provides a time-decaying signal to the patient.
5 more elements
An implantable apparatus for delivering electrical cardiac therapy to a patient, the implantable apparatus comprising:
- power circuitry for creating a cardiac therapy signal, the power circuitry including a capacitive circuit chargeable to create the cardiac therapy signal;
- an H-bridge circuit for delivering the cardiac therapy signal from the power circuitry to the patient;
- current controlling circuitry for selectively controlling current passing through the H-Bridge;
- and
- an implantable housing containing each of the power circuitry, H-Bridge circuit, and current controlling circuitry;
- wherein the implantable apparatus is configured to use at least:
- a first configuration in which the current controlling circuitry modifies the cardiac therapy signal to provide an approximately constant current signal to the patient, and
- a second configuration in which the current controlling circuitry allows the power circuitry provides a time-decaying signal to the patient.
5 more elements
Dependencies are inferred from the claim text.