Subcutaneous cardiac stimulation device providing anti-tachycardia pacing therapy and method
First Claim
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1. A system comprising:
- an implantable subcutaneous device comprising;
at least two subcutaneous electrodes adapted for placement external to a heart;
a cardiac output monitor that monitors cardiac output;
an arrhythmia detector that detects a tachyarrhythmia of the heart;
a first pulse generator that delivers one or more of anti-tachycardia pacing therapy, cardioversion therapy or defibrillation therapy to the heart using the at least two subcutaneous electrodes;
a telemetry device;
a processor programmed to withhold anti-tachycardia pacing therapy upon onset of a tachyarrhythmia, while cardiac output is monitored for a decrease in value and to output a command through the telemetry device to deliver anti-tachycardia pacing pulses in response to detection of a decrease in cardiac output accompanying the tachyarrhythmia; and
a fully implanted stimulation device comprising;
at least one intracardiac electrode adapted for placement within a heart;
a second pulse generator that delivers one or more of anti-tachycardia pacing therapy, cardioversion therapy or defibrillation therapy to the heart using the at least one intracardiac electrode in response to the command from the telemetry device.
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Abstract
An implantable subcutaneous cardiac device includes at least two subcutaneous electrodes adapted for placement external to a heart beneath the skin of a patient. The device further includes an arrhythmia detector that detects a sustained tachyarrhythmia of the heart and a pulse generator that delivers anti-tachycardia pacing pulses to the subcutaneous electrodes in response to detection of a sustained tachyarrhythmia. The pacing pulses preferably have waveforms devoid of any exponential voltage decay and include rounded or substantially constant portions to minimize pain.
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Citations
5 Claims
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1. A system comprising:
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an implantable subcutaneous device comprising; at least two subcutaneous electrodes adapted for placement external to a heart; a cardiac output monitor that monitors cardiac output; an arrhythmia detector that detects a tachyarrhythmia of the heart; a first pulse generator that delivers one or more of anti-tachycardia pacing therapy, cardioversion therapy or defibrillation therapy to the heart using the at least two subcutaneous electrodes; a telemetry device; a processor programmed to withhold anti-tachycardia pacing therapy upon onset of a tachyarrhythmia, while cardiac output is monitored for a decrease in value and to output a command through the telemetry device to deliver anti-tachycardia pacing pulses in response to detection of a decrease in cardiac output accompanying the tachyarrhythmia; and a fully implanted stimulation device comprising; at least one intracardiac electrode adapted for placement within a heart; a second pulse generator that delivers one or more of anti-tachycardia pacing therapy, cardioversion therapy or defibrillation therapy to the heart using the at least one intracardiac electrode in response to the command from the telemetry device. - View Dependent Claims (2, 3, 4, 5)
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Specification