CA2096454A1 - Method for tachycardia discrimination - Google Patents

Method for tachycardia discrimination

Info

Publication number
CA2096454A1
CA2096454A1 CA2096454A CA2096454A CA2096454A1 CA 2096454 A1 CA2096454 A1 CA 2096454A1 CA 2096454 A CA2096454 A CA 2096454A CA 2096454 A CA2096454 A CA 2096454A CA 2096454 A1 CA2096454 A1 CA 2096454A1
Authority
CA
Canada
Prior art keywords
baseline
feature values
determined
sequence
discrimination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2096454A
Other languages
French (fr)
Other versions
CA2096454C (en
Inventor
Lawrence S. Baumann
David K. Swanson
Douglas Lang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cardiac Pacemakers Inc
Original Assignee
Lawrence S. Baumann
David K. Swanson
Douglas Lang
Cardiac Pacemakers, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lawrence S. Baumann, David K. Swanson, Douglas Lang, Cardiac Pacemakers, Inc. filed Critical Lawrence S. Baumann
Publication of CA2096454A1 publication Critical patent/CA2096454A1/en
Application granted granted Critical
Publication of CA2096454C publication Critical patent/CA2096454C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A61B5/346—Analysis of electrocardiograms
    • A61B5/349—Detecting specific parameters of the electrocardiograph cycle
    • A61B5/363—Detecting tachycardia or bradycardia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives

Abstract

A cardiac discrimination method in which feature values of a heart related signal (e.g., cardiac biopotentials) determined to be non-baseline are compared with feature values of a heart related signal determined to be normal baseline. The feature values are extracted on an event-basis (a periodically), for obtaining feature values of a complex. For each complex, the feature values form a sequence with the value having the largest absolute value for the sequence given special identity as a fiducial point. The normal baseline complexes' characteristic sequence and a non-baseline complex's sequence are aligned according to the fiducial points, and unoccupied positions on the ends of the sequences resulting from the alignment are filled with zeros to create normal baseline and non-baseline vectors. The similarity value and dissimilarity value of the normalized non-baseline vector with respect to the normalized normal baseline vector are determined. The type of tachycardia (VT or non-VT) and consequently the selection of appropriate therapy are determined by the location in a discrimination plane of a discrimination point, the coordinates of which are equal to the similarity and dissimilarity values. In addition, the location of a similarly generated hemodynamic discrimination point can be used to discriminate hemodynamically stable and unstable tachycardias based on the features derived from events in hemodynamic related
CA002096454A 1992-05-18 1993-05-18 Method for tachycardia discrimination Expired - Fee Related CA2096454C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/884,770 US5311874A (en) 1992-05-18 1992-05-18 Method for tachycardia discrimination
US07/884,770 1992-05-18

Publications (2)

Publication Number Publication Date
CA2096454A1 true CA2096454A1 (en) 1993-11-19
CA2096454C CA2096454C (en) 1997-10-21

Family

ID=25385355

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002096454A Expired - Fee Related CA2096454C (en) 1992-05-18 1993-05-18 Method for tachycardia discrimination

Country Status (7)

Country Link
US (1) US5311874A (en)
EP (1) EP0570896B1 (en)
JP (1) JPH0690915A (en)
AT (1) ATE313117T1 (en)
AU (2) AU659551B2 (en)
CA (1) CA2096454C (en)
DE (1) DE69333935T2 (en)

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Also Published As

Publication number Publication date
CA2096454C (en) 1997-10-21
EP0570896A3 (en) 1996-01-31
US5311874A (en) 1994-05-17
AU3862893A (en) 1993-11-25
DE69333935T2 (en) 2006-08-24
ATE313117T1 (en) 2005-12-15
JPH0690915A (en) 1994-04-05
AU659551B2 (en) 1995-05-18
EP0570896B1 (en) 2005-12-14
DE69333935D1 (en) 2006-01-19
AU1488095A (en) 1995-05-25
EP0570896A2 (en) 1993-11-24

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