An In-Principle Method for Measuring Cardiac Tissue Fibre Rotation

Four electrode techniques have long been used to deter- mine conductivity parameters in cardiac tissue. This paper introduces a mathematical model and solution technique to theoretically analyse electrode configurations, specifically allowing for plunge electrodes. In particular, the focus is on using four electrode configurations to deter- mine fibre rotation in cardiac tissue. Two configurations are analysed, the first with the four electrodes collinear and the second consisting of two probes a fixed distance apart, with the current electrodes on one probe and the measuring electrodes on the other. It is found that the sec- ond electrode configuration can yield a value for the fibre rotation under the assumptions of the model.

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