Apparatus for treating atrial tachyarrhythmias with synchronized shocks
First Claim
1. An atrial defibrillator, comprising:
- an atrial event sensor;
a ventricular event sensor;
an atrial tachyarrhythmia sensor;
an atrial defibrillation pulse generator; and
a pulse synchronizer comprising a timer defining a first synchronization interval initiated following a sensed atrial event and a second synchronization interval initiated responsive to a sensed ventricular event and a defibrillation pulse triggerer responsive to the first and second synchronization intervals being concurrently underway following a sensed atrial tachyarrhythmia.
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Accused Products
Abstract
An implantable anti-tachyarrhythmia device which delivers atrial cardioversion or defibrillation pulses heart in response to detection of atrial tachyarrhythmias. The pulses are synchronized to atrial and ventricular events in such a fashion as to assure they occur outside of the vulnerable periods associated with both chambers. The device is provided with a pulse synchronizer which defines a first synchronization interval initiated following a sensed atrial event and a second synchronization interval initiated responsive to a sensed ventricular event and a pulse triggerer which triggers delivery of a cardioversion or defibrillation pulse responsive to the first and second synchronization intervals simultaneously being underway. In particular, the pulse triggerer may be responsive to initiation of the first synchronization interval during the second synchronization interval. In addition, the synchronizer may also define minimum time intervals following ventricular events and the triggerer may additionally be responsive to expiration of a defined minimum time interval following a ventricular event preceding the sensed ventricular event which initiated the second synchronization interval currently underway.
137 Citations
14 Claims
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1. An atrial defibrillator, comprising:
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an atrial event sensor; a ventricular event sensor; an atrial tachyarrhythmia sensor; an atrial defibrillation pulse generator; and a pulse synchronizer comprising a timer defining a first synchronization interval initiated following a sensed atrial event and a second synchronization interval initiated responsive to a sensed ventricular event and a defibrillation pulse triggerer responsive to the first and second synchronization intervals being concurrently underway following a sensed atrial tachyarrhythmia. - View Dependent Claims (2, 3, 4, 5)
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6. An atrial defibrillator, comprising:
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an atrial event sensor; a ventricular event sensor; an atrial tachyarrhythmia sensor; an atrial defibrillation pulse generator; and a pulse synchronizer comprising a timer defining a first synchronization interval initiated on expiration of a first time interval following a sensed atrial event and a second synchronization interval initiated on expiration of a second time interval following a sensed ventricular event and a defibrillation pulse triggerer responsive to the first and second synchronization intervals being concurrently underway following a sensed atrial tachyarrhythmia. - View Dependent Claims (7)
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8. An atrial cardioverter, comprising:
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an atrial event sensor; a ventricular event sensor; an atrial tachyarrhythmia sensor; an atrial cardioversion pulse generator; and a pulse synchronizer comprising a timer defining a first synchronization interval initiated following a sensed atrial event and a second synchronization interval initiated responsive to a sensed ventricular event and a cardioversion pulse triggerer responsive to the first and second synchronization intervals being concurrently underway following a sensed atrial tachyarrhythmia. - View Dependent Claims (9, 10, 11, 12)
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13. An atrial cardioverter, comprising:
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an atrial event sensor; a ventricular event sensor; an atrial tachyarrhythmia sensor; an atrial cardioversion pulse generator; and a pulse synchronizer comprising a timer defining a first synchronization interval initiated on expiration of a first time interval following a sensed atrial event and a second synchronization interval initiated on expiration of a second time interval following a sensed ventricular event and a cardioversion pulse triggerer responsive to the first and second synchronization intervals being concurrently underway following a sensed atrial tachyarrhythmia. - View Dependent Claims (14)
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Specification