TEMPORARY DISABLEMENT FEATURE FOR IMPLANTABLE DEVICE WITH ANTI-TACHYARRHYTHMIA FUNCTIONS
First Claim
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1. A method for operating a cardiac device, comprising:
- sensing an electrogram signal representing cardiac electrical activity and generating a chamber sense when the electrogram signal exceeds a specified threshold;
detecting a tachyarrhythmia from the rate at which chamber senses are generated;
delivering anti-tachyarrhythmia therapy through one or more stimulation channels upon detection of a tachyarrhythmia;
measuring an activity level;
disabling the delivery of anti-tachyarrhythmia therapy for a specified time interval upon receipt of a temporary suspend command from an external device via telemetry and re-enabling the delivery of anti-tachyarrhythmia therapy upon expiration of the specified time interval; and
,re-enabling delivery of anti-tachyarrhythmia therapy before expiration of the specified time interval upon measurement of an activity level above a specified threshold value.
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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.
11 Citations
19 Claims
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1. A method for operating a cardiac device, comprising:
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sensing an electrogram signal representing cardiac electrical activity and generating a chamber sense when the electrogram signal exceeds a specified threshold; detecting a tachyarrhythmia from the rate at which chamber senses are generated; delivering anti-tachyarrhythmia therapy through one or more stimulation channels upon detection of a tachyarrhythmia; measuring an activity level; disabling the delivery of anti-tachyarrhythmia therapy for a specified time interval upon receipt of a temporary suspend command from an external device via telemetry and re-enabling the delivery of anti-tachyarrhythmia therapy upon expiration of the specified time interval; and
,re-enabling delivery of anti-tachyarrhythmia therapy before expiration of the specified time interval upon measurement of an activity level above a specified threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for operating a cardiac device, comprising:
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sensing an electrogram signal representing cardiac electrical activity and generating a chamber sense when the electrogram signal exceeds a specified threshold; detecting a tachyarrhythmia from the rate at which chamber senses are generated; delivering anti-tachyarrhythmia therapy through one or more stimulation channels upon detection of a tachyarrhythmia; disabling the delivery of anti-tachyarrhythmia therapy indefinitely upon receipt of an indefinite suspend with magnetic re-enable command from an external device via telemetry; and
,re-enabling the delivery of anti-tachyarrhythmia therapy upon actuation of a magnetic switch. - View Dependent Claims (15)
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16. A method for operating a cardiac device, comprising:
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sensing an electrogram signal representing cardiac electrical activity and generating a chamber sense when the electrogram signal exceeds a specified threshold; detecting a tachyarrhythmia from the rate at which chamber senses are generated; delivering anti-tachyarrhythmia therapy through one or more stimulation channels upon detection of a tachyarrhythmia; measuring an activity level; disabling the delivery of the anti-tachyarrhythmia therapy indefinitely upon receipt of an indefinite suspend with activity re-enable command from an external device via telemetry; and
,re-enabling the delivery of anti-tachyarrhythmia therapy upon measurement of an activity level above a specified threshold value. - View Dependent Claims (17, 18, 19)
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Specification