Apparatus for producing configurable biphastic defibrillation waveforms

Details

Inventors: Pless, Benjamin;
Assignee: Ventritex, Inc. (Sunnyvale, CA)
Primary Examiner: Kamm; William E.
Assistant Examiner: Getzow; Scott M.
Attorney, Agent or Firm: Mitchell; Steven M., Meltzer; Mark J.

A programmable implantable medical device utilizable for delivering a configurable defibrillation waveform to a heart. The device includes defibrillation electrode means adapted to be connected to the heart for delivering a multiphasic defibrillation waveform thereto. A programmable waveform generator connected to the heart generates the multiphasic waveform such that at least one phase of the defibrillation waveform has programmed constant tilt.

DETAILED DESCRIPTION The present invention provides a microprocessor controlled output stage that allows for greater flexibility than has been available in defining a biphasic defibrillation waveform.
In accordance with the invention, the biphasic waveform generator may be programmed to provide either positive and negative phases having selected constant tilt or a positive phase having a selected constant tilt and a negative phase having a duration that is related to the duration of the positive phase.
The disclosed apparatus can also produce conventional multiphasic waveforms, if desired.
A better understanding of the features and advantages of the present invention will be obtained by reference to the following detailed description and accompanying drawings which set forth an illustrative embodiment in which the principles of the invention are utilized.

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