Cardiac arrhythmia detection using interdependent multiple param

Details Cardiac arrhythmia detection using interdependent multiple param Cardiac arrhythmia detection using interdependent multiple param

1994-02-14

1995-10-17

Cohen, Lee S.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

128705, A61N 139

Patent

active

054586208

ABSTRACT:
A programmable implantable cardioverter defibrillator (ICD) provides signals from a plurality of cardiac sensing modalities to a control circuit within the ICD that analyzes the signals and determines whether to deliver an electrical countershock therapy. An interdependent detection parameter threshold is programmably established for each of a programmably selectable combination of two or more cardiac sensing modalities by selecting at least two corner points that will define a boundary condition for a given cardiac dysrhythmia. Whenever the threshold is exceeded, the control circuit automatically diagnoses a cardiac dysrhythmia and delivers a preprogrammed electrical countershock therapy regimen for the diagnosed dysrhythmia. Multiple interdependent detection parameter thresholds may be combined in a variety of ways. More than one combination of two or more cardiac sensing modalities may be used to define a multivariant boundary condition for the given cardiac dysrhythmia. Alternatively, more than one set of corner points for a particular combination of cardiac sensing modalities may be used so as to create multiple detection envelopes, one for each different type of cardiac dysrhythmia. Finally, both of these options may be programmed together so as to allow for the definition of multivariant performance envelopes for different cardiac dysrhythmias.

REFERENCES:
patent: 5312443 (1994-05-01), Adams et al.

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