Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2004-04-29
2008-10-28
Layno, Carl H. (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C607S005000, C600S512000, C600S515000, C600S523000, C128S920000
Reexamination Certificate
active
07444179
ABSTRACT:
A method of determining a state of ventricular fibrillation, includes: measuring the rhythm of the heart during ventricular fibrillation for a period of time; creating a lagged phase space reconstruction of the measured rhythm; determining a first value related to the rate of change of the leading edge of the phase space reconstruction over the period of time; and determining the state of ventricular fibrillation by relating the first value to the state of ventricular fibrillation. A defibrillation system includes at least one processor in communication with a sensor to measure heart rhythm and an applicator to apply a defibrillation pulse. The processor is adapted to create a lagged phase space reconstruction of ventricular fibrillation heart rhythm and to determine a first value related to the rate of change of the leading edge of the phase space reconstruction over a period of time.
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Callaway Clifton W
Menegazzi James J.
Sherman Lawrence D
Bartony & Hare, LLP
Layno Carl H.
Malamud Deborah
University of Pittsburgh-Of the Commonwealth System of Higher Ed
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