Wavelength Dependence of Optical Action Potentials in the Isolated Rat Atrium

Abstract

The wavelength dependence of optical action potentials was studied using voltage-sensitive merocyanine-rhodanine, merocyanine-oxazolone, and oxonol dyes in the isolated rat atrium preparation. Most of the dyes had action spectra that were similar to those reported in other pre-parations. Species-to-species difference was observed with a merocyanine-oxazolone dye.