“…8,13 Inotropic agents, such as dobutamine or enoximone, and vasodilating agents, such as nitroglycerin, nitroprusside, adenosine, sitaxsentan (an endothelin receptor blocker), prostglandin I 2 , prostaglandin E 1 and inhaled nitric oxide, have been evaluated in studies with small numbers of patients. 11,[15][16][17][18][19][20][21][22][23][24] At present, there is no clear consensus on the best agent available, but nitric oxide and prostaglandin E 1 appear to be the most promising. 18,20,24 Because there is a lack of a guideline-recommended, standardized protocol for pre-transplant reversibility testing of elevated PVR, and a lack of any prospective study evaluating the effectiveness of a potent vasodilator for reversibility of PVR in a large group of heart transplant candidates, the Working Group on Thoracic Organ Transplantation of the German Society of Cardiology designed and performed the PROPHET study.…”