Dronedarone-d6 is intended for use as an internal standard for the quantification of dronedarone by GC- or LC-MS. Dronedarone is an antiarrhythmic agent and a derivative of amiodarone .1,2 It inhibits muscarinic acetylcholine receptor-dependent potassium currents induced by carbachol or intracellular loading of GTPγS in single cells isolated from guinea pig atria (IC50s = 0.1 and 1 µM, respectively).2 Dronedarone (50 and 100 mg/kg) reduces sinus frequency and prolongs action potential duration (APD) in isolated rabbit ventricular myocardium. It increases atrial APD and the atrial effective refractory period (AERP) in a dog model of atrial fibrillation induced by rapid right atrial pacing.3 Formulations containing dronedarone have been used in the treatment of atrial fibrillation.
1.Sun, W., Sarma, J.S., and Singh, B.N.Electrophysiological effects of dronedarone (SR33589), a noniodinated benzofuran derivative, in the rabbit heart: Comparison with amiodaroneCirculation100(22)2276-2281(1999) 2.Guillemare, E., Marion, A., Nisato, D., et al.Inhibitory effects of dronedarone on muscarinic K+ current in guinea pig atrial cellsJ. Cardiovasc. Pharmacol.36(6)802-805(2000) 3.Saengklub, N., Limprasutr, V., Sawangkoon, S., et al.Dronedarone attenuates the duration of atrial fibrillation in a dog model of sustained atrial fibrillationExp. Anim.66(3)251-258(2017)