System for delivering low pain therapeutic electrical waveforms

Details System for delivering low pain therapeutic electrical waveforms System for delivering low pain therapeutic electrical waveforms

1996-10-29

1998-11-03

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 139

Patent

active

058302360

ABSTRACT:
A system for delivering low pain cardioversion shocks to the heart wherein the system provides a waveform to the heart for cardioversion purposes to result in less stimulation of sensory nerves surrounding the heart. In one embodiment, the system includes a controller and a plurality of controlled switches that can be configured so that the heart receives a waveform through one or more resistors from a capacitor. The controller is configured to manipulate the switches so that the waveform that is applied to the heart is applied for more than 10 milliseconds so that the ratio of stimulation of the cardiac cells to the stimulation of sensory cells is approximately one. In another embodiment, the controller configures the switches so that a first capacitor discharges to charge a second capacitor through a resistor wherein the second capacitor is in parallel with the heart. The heart then sees a waveform that inverse exponentially rises to a peak value over a time period selected to reduce stimulation of the sensory nerves.

REFERENCES:
patent: 4403614 (1983-09-01), Engle et al.
patent: 5318591 (1994-06-01), Causey, III et al.

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