R-wave detection method for implantable cardioverter defibrillat

Details R-wave detection method for implantable cardioverter defibrillat R-wave detection method for implantable cardioverter defibrillat

1995-09-06

1998-01-20

Kamm, William E.

Surgery

Truss

Pad

607 5, A61B 50456

Patent

active

057092150

ABSTRACT:
An ICD detection method for sensing the occurrence of an R-wave improves the ability to distinguish R-waves from noise through the use of variable declining sensitivity thresholds. The method includes the consideration of the amplitude of at least the previous most recent R-wave to determine a declining threshold of sensitivity used to recognize a subsequent electrical signal as an R-wave. In the method, the amplitude of the previous R-wave may be classified, based upon amplitude, and based upon the classification, a desirable time constant for the declining threshold of sensitivity is provided as an exponential or reverse exponential decay. Alternatively, a piece wise use of various decay formulas may be combined and used to avoid false recognition of noise as an R-wave.

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patent: 5312443 (1994-05-01), Adams et al.
patent: 5370124 (1994-12-01), Dissing et al.
patent: 5395393 (1995-03-01), Wickham

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