Patent EP0398488A2 successfully refreshed from Google Patents.
EP0398488A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cardiac therapy device
Assignee: Ventritex Inc
•
Filing: 1990-04-06
•
Granted: —
•
Expires: 2010-04-06
Abstract
Abstract A cardiac therapy method with duration timer is disclosed, using an implanted cardiac pulse generator. A patient's heartbeat is sensed and the intervals between heartbeats are averaged. The number of temporary storage bins, in the form of RAM locations, are provided, including a sinus bin, a low rate tachycardia bin, a high rate tachycardia bin, and a fibrillation bin. The storage bin corresponding to the cardiac rhythm band of the determined average heartbeat interval is incremented. A maximum count limit is assigned to each storage bin. When the first bin reaches its maximum count limit, a diagnosis of the patient's cardiac rhythm is provided. Upon detection of a tachycardia, a duration timer is started and the tachycardia is treated in accordance with a programmed routine. If sinus is detected during the predetermined time period, then the duration timer is cleared. If fibrillation is detected during the predetermined time period, then the duration timer is cleared and fibrillation is treated by delivering a high energy shock to the heart.
Inventors
- 👤 Benjamin D. Pless
- 👤 Phillip L. Ball
- 👤 Eric Fain
- 👤 Richard Luceri M.D.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 22:29
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3621; A61N1/38; A61N1/39; A61N1/3956; A61N1/3987
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A cardiac therapy device which comprises: an implantable cardiac pulse generator having means for sensing a patient's heartbeat; storage means including a plurality of storage count bins, including a sinus bin, a tachycardia bin, and a fibrillation bin; means for determining the intervals between heartbeats; means for changing the count of the sinus bin if the determined interval is within a sinus band; means for changing the count of the tachycardia bin if the determined interval is within a tachycardia band; means for changing the count of the fibrillation bin if the determined interval is within a fibrillation band; means for assigning a count limit to each bin; means for detecting when the first bin reaches its count limit; means for providing a diagnosis of the patient's cardiac rhythm that is responsive to the first bin to reach its count limit; and means for initializing said temporary storage bins.
Claim 2
Dependent Claim
149 words
A cardiac therapy device which comprises: an implantable cardiac pulse generator having means for sensing a patient's heartbeat; storage means including a plurality of storage count bins, including a sinus bin, a tachycardia bin, and a fibrillation bin; means for determining the intervals between heartbeats; means for changing the count of the sinus bin if the determined interval is within a sinus band; means for changing the count of the tachycardia bin if the determined interval is within a tachycardia band; means for changing the count of the fibrillation bin if the determined interval is within a fibrillation band; means for assigning a count limit to each bin; means for detecting when the first bin reaches its count limit; means for providing a diagnosis of the patient's cardiac rhythm that is responsive to the first bin to reach its count limit; and means for initializing said temporary storage bins.
Claim 3
Dependent Claim
31 words
A device as defined by Claim 1, wherein the means for providing a tachycardia bin includes the means for providing a low rate tachycardia bin and a high rate tachycardia bin.
Claim 4
Dependent Claim
28 words
A device as defined by Claim 1, wherein the means for assigning the count limit to each bin includes means for assigning different count limits to different bins.
Claim 5
Dependent Claim
31 words
A device as defined by Claim 1, wherein the means for determining the intervals between heartbeats includes means for averaging a predetermined number of sensed heartbeats to provide an average interval.
Claim 6
Dependent Claim
114 words
A cardiac therapy device which comprises: an implantable cardiac pulse generator having means for sensing a patient's heartbeat; storage means including a plurality of storage count bins, each of which corresponds to a different cardiac rhythm band; means for determining the intervals between heartbeats; means for changing the count of the storage bin corresponding to the cardiac rhythm band of the determined heartbeat interval; means for assigning a count limit to each storage bin; means for detecting when the first bin reaches its count limit; means for providing a diagnosis of the patient's cardiac rhythm that is responsive to the first bin to reach its count limit; and means for intializing said storage bins.
Claim 7
Dependent Claim
114 words
A cardiac therapy device which comprises: an implantable cardiac pulse generator having means for sensing a patient's heartbeat; storage means including a plurality of storage count bins, each of which corresponds to a different cardiac rhythm band; means for determining the intervals between heartbeats; means for changing the count of the storage bin corresponding to the cardiac rhythm band of the determined heartbeat interval; means for assigning a count limit to each storage bin; means for detecting when the first bin reaches its count limit; means for providing a diagnosis of the patient's cardiac rhythm that is responsive to the first bin to reach its count limit; and means for intializing said storage bins.
Claim 8
Dependent Claim
67 words
A cardiac therapy device which comprises: an implantable cardiac pulse generator having means for sensing a patient's heartbeat; means for determining the intervals between heartbeats; means for treating for an arrhythmia if the heartbeats exceed a first rate; and means for continuing to treat for an arrhythmia unless the heartbeat rate declines to below a second rate, with the second rate being lower than the first rate.
Claim 9
Dependent Claim
67 words
A cardiac therapy device which comprises: an implantable cardiac pulse generator having means for sensing a patient's heartbeat; means for determining the intervals between heartbeats; means for treating for an arrhythmia if the heartbeats exceed a first rate; and means for continuing to treat for an arrhythmia unless the heartbeat rate declines to below a second rate, with the second rate being lower than the first rate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.