“…Other vasodilators, including molsidomine, had no beneficial effect on hemodynamics or oxygen Nitroprusside does not produce sustained hemodyn'amic benefits. The effects of the prostaglandin, alprostadil, included a reduction in PAP and PVR, resulting in an increase in CO and oxygen 208 Similar effects were seen with the oral administration of a PGE, analog, OP-1 206.209 Epoprostenol produced immediate hemodynamic benefit in some, but not all, 210 Studies of extended treatment with prostaglandins are necessary to evaluate if hemodynamic effects are sustained and to determine the clinical benefits of the hemodynamic effects.…”