Figure 6. Summary of the effects of Ca²⁺ ‐sensitive K⁺ currents.

A, if alternans is ${\mathrm{Ca}}_{\mathrm{i}}^{2+}$‐driven, Ca²⁺‐sensitive K⁺ currents promote electromechanically discordant alternans. B, if alternans is V _m‐driven, electromechanically concordant alternans remains electromechanically concordant even when Ca²⁺‐sensitive K⁺ currents are increased.