Apparatus and method for treating ventricular tachyarrhythmias
First Claim
1. An implantable cardioverter-defibrillator, comprising:
- an atrial catheter including at least one atrial sensing electrode;
a ventricular catheter including at least one ventricular sensing electrode and at least one ventricular defibrillation electrode;
sensing circuitry, coupled to the atrial catheter and the ventricular catheter, the sensing circuitry adapted to sense atrial events and ventricular events from the electrodes;
therapy delivery circuitry, coupled to the ventricular catheter, the therapy delivery circuitry adapted to apply or inhibit a ventricular tachycardia therapy; and
control circuitry, coupled to the sensing circuitry and therapy circuitry, the control circuitry adapted to;
detect at least one of a ventricular tachycardia and a ventricular fibrillation by analyzing the sensed ventricular events;
start a first time interval when the at least one of the ventricular tachycardia and the ventricular fibrillation is detected;
analyze the sensed atrial and ventricular events during the first time interval for assessing an origin of the detected at least one of the ventricular tachycardia and the ventricular fibrillation;
determine whether to delay or inhibit the ventricular tachycardia therapy based on the origin of the detected at least one of the ventricular tachycardia and the ventricular fibrillation;
determine whether the detected at least one of the ventricular tachycardia and the ventricular fibrillation is sustained during the first time interval; and
reset the first time interval if the at least one of the ventricular tachycardia and the ventricular fibrillation does not sustain during the first time interval.
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Abstract
A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient'"'"'s heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.
180 Citations
18 Claims
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1. An implantable cardioverter-defibrillator, comprising:
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an atrial catheter including at least one atrial sensing electrode; a ventricular catheter including at least one ventricular sensing electrode and at least one ventricular defibrillation electrode; sensing circuitry, coupled to the atrial catheter and the ventricular catheter, the sensing circuitry adapted to sense atrial events and ventricular events from the electrodes; therapy delivery circuitry, coupled to the ventricular catheter, the therapy delivery circuitry adapted to apply or inhibit a ventricular tachycardia therapy; and control circuitry, coupled to the sensing circuitry and therapy circuitry, the control circuitry adapted to; detect at least one of a ventricular tachycardia and a ventricular fibrillation by analyzing the sensed ventricular events; start a first time interval when the at least one of the ventricular tachycardia and the ventricular fibrillation is detected; analyze the sensed atrial and ventricular events during the first time interval for assessing an origin of the detected at least one of the ventricular tachycardia and the ventricular fibrillation; determine whether to delay or inhibit the ventricular tachycardia therapy based on the origin of the detected at least one of the ventricular tachycardia and the ventricular fibrillation; determine whether the detected at least one of the ventricular tachycardia and the ventricular fibrillation is sustained during the first time interval; and reset the first time interval if the at least one of the ventricular tachycardia and the ventricular fibrillation does not sustain during the first time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification