EP0220916A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for recognition of ventricular tachycardia and ventricular fibrillation and for termination thereof
Assignee: Individual
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Filing: 1986-10-21
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Granted: —
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Expires: 2006-10-21
Abstract
Abstract Apparatus for the automatic recognition of ventricular tachycardia and ventricular fibrillation compares pulse sequences which are obtained when sensing at at least one position on each ventricular epicardial surface of a heart. Changes in the sequence of activations and in the timing from pulsing at one sensor position to next pulsing at that position will indicate both ventricular tachycardia and ventricular fibrillation to enable a response to be made to restore to a pulse sequence representing the normal ventricular activity of the heart.
Inventors
- 👤 David Wyn Davies
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 11:12
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/36; A61N1/362; A61N1/3621
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
Apparatus for the automatic recognition of ventricular tachycardia and ventricular fibrillation characterized by: at least two sensors (A,B,C,D) for attachment of at least one sensor to each ventricular epicardial surface of a heart; signal paths connecting the sensors to programmed means (2,5,6) for detecting a pulse sequence representing the ventricular electrical activity of the heart and for comparing the pulse sequence detected with that representing the electrical activity of the heart during normal ventricular rhythm of the heart; and means for converting the detected pulse sequence into a form which will be useful for providing a corrective response to a pulse sequence representing the electrical activity of the heart during abnormal ventricular rhythm of the heart.
Claim 2
Dependent Claim
116 words
Apparatus for the automatic recognition of ventricular tachycardia and ventricular fibrillation characterized by: at least two sensors (A,B,C,D) for attachment of at least one sensor to each ventricular epicardial surface of a heart; signal paths connecting the sensors to programmed means (2,5,6) for detecting a pulse sequence representing the ventricular electrical activity of the heart and for comparing the pulse sequence detected with that representing the electrical activity of the heart during normal ventricular rhythm of the heart; and means for converting the detected pulse sequence into a form which will be useful for providing a corrective response to a pulse sequence representing the electrical activity of the heart during abnormal ventricular rhythm of the heart.
Claim 3
Dependent Claim
28 words
Apparatus as claimed in Claim 1, which additionally comprises means (7,8) for supplying to the heart stimuli to restore normal rhythm thereto following identification of abnormal ventricular rhythm.
Claim 4
Dependent Claim
36 words
Apparatus as claimed in claim 2, wherein said heart stimuli supplying means (7,8) is adapted to supply less energetic heart stimuli in the event of ventricular tachycardia identification than in the event of ventricular fibrillation identification.
Claim 5
Dependent Claim
19 words
Apparatus as claimed in Claim 1, additionally comprising means for converting the detected pulse sequence into a readable form.
Claim 6
Dependent Claim
66 words
Apparatus as claimed in Claim 1, wherein for any predetermined arrangement of the sensors on the ventricular epicardial surfaces, the programmed means (5,6) is programmed to detect the time interval occupied by a predetermined number of pulses and the sequence of activations, both of which detected parameters are ; compared by the programmed means with the same parameters when determined during normal rhythm of the heart.
Claim 7
Dependent Claim
22 words
Apparatus as claimed in Claim 5, wherein the programmed means (5,6) is programmed to detect asynchronous electrical activity at said heart surfaces.
Claim 8
Dependent Claim
23 words
Apparatus as claimed in Claim 1, which comprises four sensors (A,B,C,D) for application two to each of the two ventricles of the heart.
Claim 9
Dependent Claim
41 words
Apparatus as claimed in claim 7, wherein two of the sensors (A,D) are for application to the left ventricular and right ventricular apices and the other two sensors (B,C) are for application to the left ventricular and right ventricular paraseptal positions.
References Cited (Backward Citations)
WO1982000415A1
Cited
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