R 80123 is the Z-isomer of R 79595, is also a highly selective phosphodiesterase inhibitor. The fuction is similar to R 80122 (HY-100615, Revizinone). In vivo: The administration of Revizinone improved the haemodynamic profile with an increase in cardiac output, a decrease in systemic vascular resistance and a stable heart rate and mean arterial blood pressure. With regard to reconstitution of contractility and cardiac function Revizinone (E-isomer) is 10 fold more potent than R 79595 and nearly 100 fold more potent than R 80123 (Z-isomer). Revizinone significantly increases global LV function and systolic wall thickening in ischemic areas at doses greater than or equal to 0.16 mg/kg i.v.

• . Vandeplassche GM et al. Comparative effects of R 80122, enoximone, and milrinone on left ventricular phosphodiesterase isoenzymes in vitro and on contractility of normal and stunned myocardium in vivo in dogs. J Cardiovasc Pharmacol. 1992 May;19(5):714-22  [Content Brief]

  . Schneider J et al. Cardiac effects of R 79595 and its isomers (R 80122 and R 80123) in an acute heart failure model. A new class of cardiotonic agents with highly selective phosphodiesterase III inhibitory properties. Naunyn Schmiedebergs Arch Pharmacol  [Content Brief]

  . Vandeplassche GM et al. Comparative effects of R 80122, enoximone, and milrinone on left ventricular phosphodiesterase isoenzymes in vitro and on contractility of normal and stunned myocardium in vivo in dogs. J Cardiovasc Pharmacol. 1992 May;19(5):714-22  [Content Brief]