Method and apparatus for detecting lead sensing artifacts in car

Details Method and apparatus for detecting lead sensing artifacts in car Method and apparatus for detecting lead sensing artifacts in car

1995-11-02

1996-09-24

Kamm, William E.

Surgery

Truss

Pad

607 5, 128901, A61B 50402

Patent

active

055580980

ABSTRACT:
An ICD system and method for its use which will detect the presence of sensing artifacts caused by lead conductor fracture, lead insulation failure or connector port fluid penetration. When such a failure results in an incorrect detection of a tachyarrhythmia, the presence of sensing artifacts or noise is noted and charging of high voltage capacitors and/or delivery of high voltage therapy is avoided. The system of the invention includes at least two pairs of sensing electrodes which provide two distinct electrogram signals to the sensing and analysis circuitry of a pulse generator. Each signal is analyzed for heart rate. The rates are compared and if the rates detected are significantly different therapy is not delivered to the patient. The sensing electrode pairs may include four independent electrodes or there may be one electrode in common with each sensing pair. In an alternative embodiment, the two signals are compared by performing a correlation analysis.

REFERENCES:
patent: 4960123 (1990-10-01), Maker
patent: 5366486 (1994-11-01), Zipes et al.
patent: 5366487 (1994-11-01), Adams et al.
patent: 5370125 (1994-12-01), Mason et al.
patent: 5486199 (1996-01-01), Kim et al.
"Cardioverter Discharges Following Sensing of Electrical Artifact Due to Fluid Penetration in the Connector Port", Hief, et al., PACE, vol. 18, Aug. 1995, pp. 1589-1591.

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