A method and apparatus for encoding an image is disclosed. The first circuit can be connected to a first electrode member suited to be positioned in or at a first ventricle of the heart. The flexible circuit includes a lead in portion and a tail portion. The terminal has a table, in which times and places meeting communication conditions are registered. The model is readily translatable into database languages such as SQL and the like. The biomass-derived epoxy compound has both high solubility in organic solvents and satisfactory heat resistance and can be manufactured in a high yield on the basis of the raw material through a less number of processes.