Adekalant, also known as H 345/52. is a new antiarrhythmic compound with low proarrhythmic activity. Adekalant concentration-dependently blocked HERG-carried currents with an IC50 of 230 nM. Adekalant preferentially bound to the open channel with unusually rapid kinetics and was trapped by channel closure. Voltage-independent behavior of Adekalant was observed during both square-pulse and action potential clamp protocols. It is proposed that block of I(Kr) is the principal mechanism by which Adekalant delays repolarization in human myocardium. Adekalant blocks I(Kr) with high potency and I(Ca) with somewhat lower potency and was found to delay ventricular repolarization without substantially increasing temporal or spatial dispersion and without inducing early after-depolarizations or TdP.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.