Patent DE575535C successfully refreshed from Google Patents.
EP0318304A2
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EP
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Dual chamber pacemaker with adaptive atrial escape interval
Assignee: Medtronic Inc
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Filing: 1988-11-25
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Granted: —
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Expires: 2008-11-25
Abstract
Abstract A dual chamber pacemaker having an atrial escape interval which is varied on a beat-to-beat basis in response to the measured time from a ventricular event (1) to the next atrial sensed event (8,9,10). Additionally, a portion (5) of the atrial escape interval is split into a first sensing portion T1 (6) and a second sensing portion T2 (7) wherein atrial sense events (8,9,10) occurring during T1 (6) may be ignored by the pacemaker, while atrial sense events (8,9,10) falling within T2 (7) are used to compute a new atrial escape interval and are used to resynchronize the pacemaker and are used to inhibit the otherwise scheduled atrial pace event (2).
Inventors
- 👤 Herman D.. Funke
- 👤 Lodewyk-Jozef Herpers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:54
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3621; A61N1/3622
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
229 words
A pacemaker having: (a) an atrial sense amplifier for producing an atrial sense event signal (AS) in response to an atrial depolarization; (b) a ventricular sense amplifier for producing a ventricular sense event signal (VS) in response to a ventricular depolarization; (c) an atrial pulse generator for producing an atrial stimulating pulse in response to an atrial pace event signal (AP); (d) a ventricular pulse generator for producing a ventricular stimulating pulse in response to a ventricular pace event signal (VP); (e) a V-A timer means for timing a V-A escape interval and for generating an atrial pace event signal at the conclusion of said V-A escape interval, and wherein said V-A escape interval is initiated by the occurrence of a ventricular event; (f) an A-V timer means for timing an A-V escape interval and for generating a ventricular pace event signal at the conclusion of said A-V escape interval and wherein said A-V escape interval may be initiated by the occurrence of an atrial event; (g) means for dividing said V-A escape interval into a first time interval T1 and a second time interval T2 such that atrial sense events occurring within said first time interval T1 increase the duration of a subsequent V-A escape interval and such that atrial sense events occurring within said second time interval T2 decrease the duration of a subsequent V-A escape interval.
Claim 2
Dependent Claim
229 words
A pacemaker having: (a) an atrial sense amplifier for producing an atrial sense event signal (AS) in response to an atrial depolarization; (b) a ventricular sense amplifier for producing a ventricular sense event signal (VS) in response to a ventricular depolarization; (c) an atrial pulse generator for producing an atrial stimulating pulse in response to an atrial pace event signal (AP); (d) a ventricular pulse generator for producing a ventricular stimulating pulse in response to a ventricular pace event signal (VP); (e) a V-A timer means for timing a V-A escape interval and for generating an atrial pace event signal at the conclusion of said V-A escape interval, and wherein said V-A escape interval is initiated by the occurrence of a ventricular event; (f) an A-V timer means for timing an A-V escape interval and for generating a ventricular pace event signal at the conclusion of said A-V escape interval and wherein said A-V escape interval may be initiated by the occurrence of an atrial event; (g) means for dividing said V-A escape interval into a first time interval T1 and a second time interval T2 such that atrial sense events occurring within said first time interval T1 increase the duration of a subsequent V-A escape interval and such that atrial sense events occurring within said second time interval T2 decrease the duration of a subsequent V-A escape interval.
Claim 3
Dependent Claim
43 words
A pacemaker as claimed in claim 1 wherein atrial sense events which occur within said first time interval do not initiate said A-V escape interval and atrial sense events which occur during said second T2 time interval do initiate said A-V escape interval.
Claim 4
Dependent Claim
54 words
A pacemaker as claimed in claim 1 or 2 further including inhibition window timer means defining an inhibition window interval at the end of said V-A escape interval such that any atrial event which occurs during said inhibition window interval prevents the generation of an atrial stimulus at the expiration of said V-A interval.
Claim 5
Dependent Claim
224 words
A pacemaker having: (a) an atrial sense amplifier for producing an atrial sense event signal (AS) in response to an atrial depolarization; (b) a ventricular sense amplifier for producing a ventricular sense event signal (VS) in response to a ventricular depolarization; (c) an atrial pulse generator for producing an atrial stimulating pulse in response to an atrial pace event signal (AP); (d) a ventricular pulse generator for producing a ventricular stimulating pulse in response to a ventricular pace event signal (VP); (e) a V-A timer means for timing a V-A escape interval and for generating an atrial pace event signal at the conclusion of said V-A escape interval, and wherein said V-A escape interval is initiated by the occurrence of a ventricular event; (f) an A-V timer means for timing an A-V escape interval and for generating a ventricular pace event signal at the conclusion of said A-V escape interval and wherein said A-V escape interval may be initiated by the occurrence of an atrial event; (g) means for dividing said V-A escape interval into a first time interval T1 and a second time interval T2 such that atrial sense events which occur during said first time interval do not initiate said A-V escape interval, and such that atrial sense events which occur during said second time interval do initiate said A-V escape interval.
Claim 6
Dependent Claim
224 words
A pacemaker having: (a) an atrial sense amplifier for producing an atrial sense event signal (AS) in response to an atrial depolarization; (b) a ventricular sense amplifier for producing a ventricular sense event signal (VS) in response to a ventricular depolarization; (c) an atrial pulse generator for producing an atrial stimulating pulse in response to an atrial pace event signal (AP); (d) a ventricular pulse generator for producing a ventricular stimulating pulse in response to a ventricular pace event signal (VP); (e) a V-A timer means for timing a V-A escape interval and for generating an atrial pace event signal at the conclusion of said V-A escape interval, and wherein said V-A escape interval is initiated by the occurrence of a ventricular event; (f) an A-V timer means for timing an A-V escape interval and for generating a ventricular pace event signal at the conclusion of said A-V escape interval and wherein said A-V escape interval may be initiated by the occurrence of an atrial event; (g) means for dividing said V-A escape interval into a first time interval T1 and a second time interval T2 such that atrial sense events which occur during said first time interval do not initiate said A-V escape interval, and such that atrial sense events which occur during said second time interval do initiate said A-V escape interval.
Claim 7
Dependent Claim
52 words
A pacemaker as claimed in claim 4 further comprising inhibition window timer means defining an inhibition window interval at the end of said V-A escape interval such that any atrial event which occurs during said inhibition window interval prevents the generation of an atrial stimulus at the expiration of said V-A interval.
References Cited (Backward Citations)
No citation records indexed.
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