Cardiodynamics International Corporation

Patrick Walton Bradley

Gail Dawn Baura

Jeremy Malecha

An electrode assembly for use with a living subject includes a substrate having first and second openings extending therethrough, and a first terminal at least partially received within the first opening. The first terminal includes an end portion having a first size. At least a portion of the first terminal configured to conduct electrical current. A second terminal is at least partially received within the second opening. The second terminal includes an end portion having a second size that is different than the first size of the first terminal end portion. At least a portion of the second terminal is configured to conduct electrical current. The assembly also includes a first electrolytic element configured to transfer electrical current between the skin of a living subject and the first terminal, and a second electrolytic element configured to transfer electrical current between the skin of a living subject and the second terminal.

Methods and apparatus for conducting electrical current

An improved apparatus and method for evaluating the need for, and performing as applicable, defibrillation. In one aspect, an improved defibrillation apparatus utilizing cardiographic impedance waveforms for determining cardiac output and accurately correlating this output to shockable or non-shockable cardiac conditions is disclosed. One exemplary embodiment uses electrodes having optimal spacing to enhance the accuracy of the impedance measurement. Another exemplary embodiment uses time-scale processing of the waveforms to identify fiducial points therein. Yet another embodiment uses advanced decision logic (such as fuzzy logic) to perform the aforementioned evaluation. The use of pacing spike detection and beat parsing based thereon is also disclosed.

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Cardiff-by-the-Sea, CA, United States of America

Patrick Walton Bradley