Tachyarrhythmia detection method

Details Tachyarrhythmia detection method Tachyarrhythmia detection method

1996-06-07

1998-03-24

Kamm, William E.

Surgery

Truss

Pad

A61B 50464

Patent

active

057301417

ABSTRACT:
A method for detecting cardiac arrhythmias which includes the steps of detecting a patient's cardiac activity, counting the number of intervals which satisfy a first selected criterion, and producing a sinus interval history count indicative of the number of such intervals which are counted, making a preliminary diagnosis of tachyarrhythmia upon detecting that the cardiac activity satisfies a second selected criterion, and, making a final diagnosis of tachyarrhythmia if the sinus interval history count is less than a selected maximum sinus interval history count, and otherwise, inhibiting a final diagnosis of tachyarrhythmia. In an alternative embodiment, the method for detecting cardiac arrhythmias includes the steps of detecting a patient's cardiac activity, counting the number of intervals which satisfy a first selected criterion, and producing a sinus interval history count indicative of the number of such intervals which are counted, making a preliminary diagnosis of tachyarrhythmia upon detecting that the cardiac activity satisfies a second selected criterion, determining if the preliminary diagnosis of tachyarrhythmia is proper according to a first measure of interval irregularity, making a qualified preliminary diagnosis of tachyarrhythmia if it is determined that the preliminary diagnosis of tachyarrhythmia is proper according to the first measure of interval irregularity, and otherwise, inhibiting a final diagnosis of tachyarrhythmia, and, if a qualified preliminary diagnosis of tachyarrhythmia is made, then making a final diagnosis of tachyarrhythmia if the sinus interval history count is less than a selected maximum sinus interval history count, and otherwise, inhibiting a final diagnosis of tachyarrhythmia. The invention also includes a cardiac therapy device, e.g., an implantable cardioverter-defibrillator (ICD), programmed to implement the tachyarrhythmia detection method of the present invention.

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