Implantable defibrillator system for generating a biphasic waveform
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United States of America Patent
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Nov 10, 1998
Issued Date -
N/A
app pub date -
Apr 21, 1995
filing date -
May 23, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for generating biphasic waveforms uses an implantable cardioverter defibrillator having two capacitor systems and a switching network. A first phase of the biphasic waveform is produced by configuring the two capacitor systems to selectively discharge first in a parallel combination, and then in a series combination. The second phase of the biphasic waveform is produced by reconfiguring the two capacitor systems in a parallel combination. By reverting to a parallel configuration for the second phase of the biphasic waveform, the output characteristics of the second phase of a biphasic waveform of the present invention more closely match a new model for understanding the effectiveness of the biphasic.
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