Method and apparatus for controlling fibrillation or tachycardia

Details Method and apparatus for controlling fibrillation or tachycardia Method and apparatus for controlling fibrillation or tachycardia

1992-02-24

1993-07-06

Howell, Kyle L.

Surgery

Truss

Pad

128419PG, A61N 139

Patent

active

052244768

ABSTRACT:
A method and apparatus for delivering a waveform, including a predetermined series of electrical pulses, to the heart by electrodes positioned adjacent the heart. In a first embodiment of the invention, a series of four electrical pulses are delivered from an electrical pulse generator including a charged storage capacitor through two pairs of electrodes and define a waveform comprising two interleaved biphasic signals. The series of electrical pulses have a low defibrillation threshold and require a relatively small amount of energy.
In a second embodiment of the invention, a triphasic waveform is applied to the heart through four electrodes. One of the pulses in the triphasic waveform is generated by all four electrodes and in a polarity opposite that of the other two pulses. The pulse generated by all four electrodes may be applied first, second, or third in the series of electrical pulses.

REFERENCES:
patent: 4850357 (1989-07-01), Bach, Jr.
patent: 4953551 (1990-09-01), Mehra et al.
patent: 5083562 (1992-01-01), de Coriolis et al.
patent: 5099838 (1992-03-01), Bardy

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