Fig. 1.

Utilising optical mapping for imaging potentiometric dye loaded mouse left atria. (A) High spatiotemporal resolution optical mapping system. (B) Exemplar fluorescent image of Di-4-ANEPPS-loaded mouse left atrium. (C) Exemplar trace from marked blue square box collected from Di-4-ANEPPS-loaded mouse left atrium stimulated with paired electrodes where indicates. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)