Low polarization pacing electrodes for capture verification

Details Low polarization pacing electrodes for capture verification Low polarization pacing electrodes for capture verification

1987-02-19

1988-08-09

Cohen, Lee S.

Surgery

Truss

Pad

128785, 128419P, A61N 105

Patent

active

047621362

ABSTRACT:
An electrode for use in cardiac pacing has a substrate composed of a material conventionally employed for pacing electrodes, and a surface layer or film of iridium oxide overlying the substrate. For use as a stimulating cathodic electrode and a sensing electrode, the iridium oxide layer is arranged to be in cardiac tissue stimulating relationship when the electrode is in proper position with respect to the patient's heart. The electrode impresses electrical stimuli on the excitable myocardial tissue, and at the completion of each stimulus, the electrode is capable of abruptly sensing, within an interval less than 100 ms thereafter, the electrical activity of the heart in response to the stimulus to verify capture. The surface of the electrode may be provided with recesses to which the iridium oxide layer may be confined. An iridium oxide layer may be provided on both the cathode and the anode for efficient transduction at the electrode-electrolyte interface formed by the surface of the iridium oxide layer and the surrounding body fluid and tissue.

REFERENCES:
patent: 3735766 (1973-05-01), Bowers et al.
patent: 4407302 (1983-10-01), Hirshorn et al.
patent: 4440178 (1984-04-01), Bussard et al.
patent: 4502492 (1985-03-01), Bornzin
patent: 4573481 (1986-03-01), Bullare
patent: 4677989 (1987-07-01), Robblee
patent: 4679572 (1987-07-01), Baker, Jr.
Robblee et al, "Activated Ir: An Electrode . . . ", J. Electrochem. Soc., pp. 731-733, vol. 130, No. 3, Mar. 1983.

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