Apparatus and method for recording monophasic action potentials

Details Apparatus and method for recording monophasic action potentials Apparatus and method for recording monophasic action potentials

1989-04-03

1990-09-11

Cohen, Lee S.

Surgery

Truss

Pad

128696, 128786, A61B 504

Patent

active

049553828

ABSTRACT:
The apparatus comprises a probe having a tip portion, a first electrode mounted on a terminal free end of the tip portion and a second electrode spaced along the tip portion from the first electrode for supplying a reference potential. The probe is constructed so as to hold the first electrode in contact with tissue of an in vivo beating heart with a positive pressure without causing macroscopic damage to the heart tissue while orienting the probe such that the second electrode is spaced from the heart tissue.
A stylet is retractably mounted within the probe, for allowing a physician to maneuver the probe through a vein or the like. Once the probe is in position, it may be replaced by a probe of a different shape. The probe may also be retracted while being inserted, for preventing internal injury to the patient. The stylet may have a noncircular cross-section for restricting directions in which it can bend. In an alternative embodiment, a combination catheter is disclosed, including pacing electrodes for pacing the heart while measuring the potentials thereof.

REFERENCES:
patent: 3665064 (1972-05-01), Mosier et al.
patent: 4172451 (1979-10-01), Kline
patent: 4365639 (1982-12-01), Goldreyer
patent: 4682603 (1987-07-01), Franz
patent: 4690155 (1987-09-01), Hess
Franz et al., "Simultaneous Recording . . . Potentials . . . ", Klin Wochenschr, 58, 1357-1359, 1980.
Franz et al., "A Simple & Safe Method . . . ", Pflugeos Arch, p. R2, 1980.
Olsson et al., "Further Improved Method . . . ", J. Electrocardiology, 4(1), pp. 19-23, 1971.

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