The combined effects of ranolazine and dronedarone on human atrial and ventricular electrophysiology

Electrophysiological measurements during exposure to ranolazine alone or in combination with low-dose dronedarone showed APD prolongation, cellular hyperpolarization and reduced SR Ca2 + leak in human atrial myocytes. The combined inhibitory effects on various currents, in particular Na+ and K+ currents, may explain the anti-AF effects observed in the HARMONY trial. Therefore, the combination of ranolazine and dronedarone, but also ranolazine alone, may be promising new treatment options for AF, especially in patients with HF, and merit further clinical investigation.