Table 2.

A summary of structures and excitation:emission wavelengths of commonly used chemical indicators to investigate cardiac deplolarization.

Indicator	Structure	Excitation:Emission	Reference
SBFI (Na+)		Ex 340/380 nm Em 510 nm	[31]
di-4-ANNEPS (voltage)		Ex 496 nm Em 705 nm	[34]
di-4-AN (F)EPPTEA (voltage)		Ex 444 nm Em 610 nm	[36]
di-4-AN BDQPQ (voltage)		Ex 488 nm Em 680 nm	[37]
FLUOVOLT (voltage) VF2.4.Cl		Ex 520 nm Em 551 nm	[35]