Method and apparatus for anti-tachycardia pacing and defibrillation
First Claim
1. An implantable cardioverter/defibrillator (ICD) configured to be communicatively coupled to an external programmer via a telemetry link, the ICD comprising:
- a sensing circuit configured to sense a cardiac signal;
a pacing circuit configured to deliver anti-tachycardia pacing (ATP) including at least one burst of pacing pulses;
a defibrillation circuit configured to deliver shocks, the defibrillation circuit including;
a defibrillation capacitor configured to store electrical energy for each of the shocks; and
a capacitor charging circuit configured to charge the defibrillation capacitor in response to a charging signal;
a ventricular tachycardia (VT) detector to detect VT using at least the cardiac signal; and
a controller coupled to the pacing circuit, the defibrillation circuit, and the VT detector, the controller configured to receive an ATP activation command and an ATP deactivation command from the external programmer via the telemetry link, activate an ATP before charge (ATP-BC) mode in response to the ATP activation command, and deactivate the ATP-BC mode in response to the ATP deactivation command, the controller including;
a charging controller configured to produce the charging signal; and
an ATP controller configured to control a delivery of the ATP before the charging controller produces the charging signal in response to a detection of the VT when the ATP-BC mode is activated.
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Accused Products
Abstract
An implantable cardioverter/defibrillator (ICD) includes an Anti-Tachycardia Pacing Before Charge (ATP-BC) mode according to which one or more high-voltage capacitors for storing defibrillation energy are charged in preparation of delivering a defibrillation shock only if a ventricular tachycardia (VT) sustains after an ATP delivery. Fast ATP delivery and effect verification methods are applied to avoid significant delay in delivering the defibrillation shock when found necessary to terminate the VT. A switch is provided such that a user decides whether to activate the ATP-BC mode or to deliver the defibrillation shock without delivering the ATP.
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Citations
20 Claims
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1. An implantable cardioverter/defibrillator (ICD) configured to be communicatively coupled to an external programmer via a telemetry link, the ICD comprising:
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a sensing circuit configured to sense a cardiac signal; a pacing circuit configured to deliver anti-tachycardia pacing (ATP) including at least one burst of pacing pulses; a defibrillation circuit configured to deliver shocks, the defibrillation circuit including; a defibrillation capacitor configured to store electrical energy for each of the shocks; and a capacitor charging circuit configured to charge the defibrillation capacitor in response to a charging signal; a ventricular tachycardia (VT) detector to detect VT using at least the cardiac signal; and a controller coupled to the pacing circuit, the defibrillation circuit, and the VT detector, the controller configured to receive an ATP activation command and an ATP deactivation command from the external programmer via the telemetry link, activate an ATP before charge (ATP-BC) mode in response to the ATP activation command, and deactivate the ATP-BC mode in response to the ATP deactivation command, the controller including; a charging controller configured to produce the charging signal; and an ATP controller configured to control a delivery of the ATP before the charging controller produces the charging signal in response to a detection of the VT when the ATP-BC mode is activated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating an implantable cardioverter/defibrillator (ICD), the method comprising:
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sensing a cardiac signal; detecting ventricular tachycardia (VT) using at least the cardiac signal; receiving an anti-tachycardia pacing (ATP) activation command or an ATP deactivation command from an external programmer communicatively coupled to the ICD via a telemetry link; activating an ATP before charge (ATP-BC) mode in response to the ATP activation command; deactivating the ATP-BC mode in response to the ATP deactivation command; and delivering ATP including at least one burst of pacing pulses before charging a defibrillation capacitor in response to a detection of the VT when the ATP-BC mode is activated, the defibrillation capacitor to be charged in preparation for delivering a shock using energy stored in the defibrillation capacitor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An implantable cardioverter/defibrillator (ICD) configured to be communicatively coupled to an external programmer via a telemetry link, the ICD comprising:
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means for sensing a cardiac signal; means for detecting ventricular tachycardia (VT) using at least the cardiac signal; means for receiving an anti-tachycardia pacing (ATP) activation command or an ATP deactivation command from the external programmer; means for activating an ATP before charge (ATP-BC) mode in response to the ATP activation command and deactivating the ATP-BC mode in response to the ATP deactivation command; and means for delivering ATP including at least one burst of pacing pulses before charging a defibrillation capacitor in response to a detection of the VT when the ATP-BC mode is activated, the defibrillation capacitor to be charged in preparation for delivering a shock using energy stored in the defibrillation capacitor. - View Dependent Claims (20)
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Specification