US5383910A
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Method and apparatus for tachyarrhythmia detection and treatment
Assignee: DUTHLER REED A
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Filing: 1993-02-19
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Granted: 1995-01-24
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Expires: 2013-02-19
Abstract
Abstract A device for detection and treatment of tachycardias, which is able to selectively identify the occurrence of re-entrant AV nodal tachycardia, and to distinguish it from sinus tachycardias. The apparatus monitors the occurrence of atrial and ventricular depolarizations during a detected tachycardia, and, in the event that a series of ventricular depolarizations occur which are each closely preceded or closely followed by an atrial depolarization, at an interval substantially less than would be expected in the case of a sinus tachycardia, re-entrant AV nodal tachycardia is identified, and an appropriate therapy regimen is triggered.
Inventors
- 👤 Karel den Dulk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:56
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3621; A61N1/3622; Y; Y10; Y10S; Y10S128/00; Y10S128/92; Y10S128/925
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
A method of detecting re-entrant A-V nodal tachycardia in a patient's heart comprising the steps of: sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; measuring the intervals between successive depolarization signals in a chamber of said patient's heart; measuring the time intervals between successive atrial and ventricular depolarization detection signals; and detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in a said chamber of said patient's heart manifesting a rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion.
Claim 2
Independent Claim
155 words
A method of detecting re-entrant A-V nodal tachycardia in a patient's heart comprising the steps of: sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; measuring the intervals between successive depolarization signals in a chamber of said patient's heart; measuring the time intervals between successive atrial and ventricular depolarization detection signals; and detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in a said chamber of said patient's heart manifesting a rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion.
Claim 3
Independent Claim
172 words
A method of detecting and treating a re-entrant A-V nodal tachycardia in a patient's heart comprising the steps of: sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; measuring the intervals between successive depolarization signals in a chamber of said patient's heart; measuring the time intervals between successive atrial and ventricular depolarization signals; detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in said chamber of said patient's heart manifesting a ventricular rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion; and in response to detection of said re-entrant A-V nodal tachycardia, delivering a predefined antitachycardia therapy.
Claim 4
Independent Claim
172 words
A method of detecting and treating a re-entrant A-V nodal tachycardia in a patient's heart comprising the steps of: sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; measuring the intervals between successive depolarization signals in a chamber of said patient's heart; measuring the time intervals between successive atrial and ventricular depolarization signals; detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in said chamber of said patient's heart manifesting a ventricular rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion; and in response to detection of said re-entrant A-V nodal tachycardia, delivering a predefined antitachycardia therapy.
Claim 5
Dependent Claim
54 words
A method according to claim 1 or claim 2 wherein said detecting step comprises detecting A-V nodal re-entrant tachycardia in response to successive ventricular depolarization signals followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time less than a predefined interval, said predefined interval being 100 milliseconds or less.
Claim 6
Dependent Claim
70 words
A method according to claim 1 or claim 2, comprising the additional step of detecting slow ventricular tachycardia with 1:1 retrograde conduction, in response to successive ventricular depolarization signals preceded by atrial depolarization signals by intervals of time within a second predetermined range of intervals greater than the expected duration of A-V intervals which would occur in a sinus tachycardia at a rate in excess of said tachycardia rate criterion.
Claim 7
Dependent Claim
170 words
Apparatus for detecting re-entrant A-V nodal tachycardia in a patient's heart, comprising: means for sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; first measuring means for measuring the intervals between successive depolarization signals in a chamber of said patient's heart; second measuring means for measuring the time intervals between successive atrial and ventricular depolarization signals; and detecting means, responsive to said first and second measuring means, for detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in said chamber of said patient's heart manifesting a rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion.
Claim 8
Dependent Claim
170 words
Apparatus for detecting re-entrant A-V nodal tachycardia in a patient's heart, comprising: means for sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; first measuring means for measuring the intervals between successive depolarization signals in a chamber of said patient's heart; second measuring means for measuring the time intervals between successive atrial and ventricular depolarization signals; and detecting means, responsive to said first and second measuring means, for detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in said chamber of said patient's heart manifesting a rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion.
Claim 9
Dependent Claim
184 words
Apparatus for detecting and treating a re-entrant A-V nodal tachycardia in a patient's heart, comprising: means for sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; first measuring means for measuring the intervals between successive ventricular depolarization signals; second measuring means for measuring the time intervals between successive atrial and ventricular depolarization detection signals; detecting means, responsive to said first and second measuring means, for detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in said chamber of said patient's heart manifesting a rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion; and means responsive to detection of said re-entrant A-V nodal tachycardia, for delivering a predefined antitachycardia therapy.
Claim 10
Dependent Claim
184 words
Apparatus for detecting and treating a re-entrant A-V nodal tachycardia in a patient's heart, comprising: means for sensing the atrium and ventricle of the patient's heart to detect atrial and ventricular depolarization signals; first measuring means for measuring the intervals between successive ventricular depolarization signals; second measuring means for measuring the time intervals between successive atrial and ventricular depolarization detection signals; detecting means, responsive to said first and second measuring means, for detecting the presence of re-entrant A-V nodal tachycardia in response to the detection of a series of depolarization signals in said chamber of said patient's heart manifesting a rate in excess of a tachycardia rate criterion, in which successive ventricular depolarization signals are followed by atrial depolarization signals separated from said ventricular depolarization signals by intervals of time which fall within a first predetermined range of intervals substantially less than the expected duration of A-V intervals which would occur in a sinus or other tachycardia at a rate in excess of said tachycardia rate criterion; and means responsive to detection of said re-entrant A-V nodal tachycardia, for delivering a predefined antitachycardia therapy.
Claim 11
Dependent Claim
56 words
An apparatus according to claim 5 or claim 6 wherein said detecting means comprises means for detecting A-V nodal re-entrant tachycardia responsive to successive ventricular depolarization signals followed by atrial depolarization signals separated from said ventricular depolarization signals by an interval of time less than a predefined interval, said predefined interval being 100 milliseconds or less.
Claim 12
Dependent Claim
74 words
An apparatus according to claim 5 or claim 6, wherein said detecting means further comprises means for detection of slow ventricular tachycardia with 1:1 retrograde conduction in response to successive ventricular depolarization signals preceded by atrial depolarization signals by intervals of time within a second predetermined range of intervals greater than the expected duration of A-V intervals which would occur in a sinus tachycardia at a rate in excess of said tachycardia rate criterion.
References Cited (Backward Citations)
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