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US 7,583,995 B2Granted
Temporary disablement feature for implantable device with anti-tachyarrhythmia functions
AssigneeCardiac Pacemakers, Inc.
InventorRichard S. Sanders
Life of this patent
Estimating the term…
Abstract
An implantable cardiac rhythm management device for delivering anti-tachyarrhythmia therapy is provided with a temporary disablement feature so that the delivery of anti-tachyarrhythmia therapy may be conveniently disabled and re-enabled. The feature is particularly useful to patients who are undergoing imaging procedures or surgical procedures where electro-cauterizing instruments may cause inadvertent triggering of cardioversion/defibrillation shocks and/or anti-tachycardia pacing.
Claims20
An implantable cardiac rhythm management device, comprising:
- a sensing channel for sensing an electrogram signal representing cardiac electrical activity and circuitry for generating a chamber sense when the electrogram signal exceeds a specified threshold;
- one or more stimulation channels for delivering electrical stimulation to a subject's heart;
- an activity sensor for measuring an activity level;
- a controller programmed to detect a tachyarrhythmia from the rate at which chamber senses are generated and to cause delivery of anti-tachyarrhythmia therapy through one or more of the stimulation channels upon detection of a tachyarrhythmia;
- a telemetry interface by which the controller may communicate with an external device;
- wherein the controller is programmed to disable the delivery of anti-tachyarrhythmia therapy for a specified time interval upon receipt of a temporary suspend command from the external device via the telemetry interface and to re-enable the delivery of anti-tachyarrhythmia therapy upon expiration of the specified time interval;
- and,
- wherein the controller is programmed to re-enable delivery of anti-tachyarrhythmia therapy before expiration of the specified time interval upon measurement of an activity level above a specified threshold value.
5 more elements
An implantable cardiac rhythm management device, comprising:
- a sensing channel for sensing an electrogram signal representing cardiac electrical activity and circuitry for generating a chamber sense when the electrogram signal exceeds a specified threshold;
- one or more stimulation channels for delivering electrical stimulation to a subject's heart;
- a controller programmed to detect a tachyarrhythmia from the rate at which chamber senses are generated and to cause delivery of anti-tachyarrhythmia therapy through one or more of the stimulation channels upon detection of a tachyarrhythmia;
- a magnetic switch interfaced to the controller which is actuated by application of a magnetic field;
- a telemetry interface by which the controller may communicate with an external device;
- and,
- wherein the controller is programmed to disable the delivery of anti-tachyarrhythmia therapy indefinitely upon receipt of an indefinite suspend with magnetic re-enable command from the external device and to re-enable the delivery of anti-tachyarrhythmia therapy upon actuation of the magnetic switch.
4 more elements
An implantable cardiac rhythm management device, comprising:
- a sensing channel for sensing an electrogram signal representing cardiac electrical activity and circuitry for generating a chamber sense when the electrogram signal exceeds a specified threshold;
- one or more stimulation channels for delivering electrical stimulation to a subject's heart;
- a controller programmed to detect a tachyarrhythmia from the rate at which chamber senses are generated and to cause delivery of anti-tachyarrhythmia therapy through one or more of the stimulation channels upon detection of a tachyarrhythmia;
- an activity sensor interfaced to the controller for measuring an activity level;
- a telemetry interface by which the controller may communicate with an external device;
- and,
- wherein the controller is programmed to disable the delivery of the anti-tachyarrhythmia therapy indefinitely upon receipt of an indefinite suspend with activity re-enable command from the external device and to re-enable the delivery of anti-tachyarrhythmia therapy upon measurement of an activity level above a specified threshold value.
4 more elements
Dependencies are inferred from the claim text.