Regarding innovative therapeutical approaches for cardiac regeneration, we thoroughly investigated CD117+ and CD117+AT2R stimulated murine bone marrow stem cells. Electrophysiological measurements and in vitro results indicated the differentiation into an endothelial-like phenotype excluding a previously discussed development into cardiomyocytes. Cell implantation into infarcted murine heart provoked a significant improvement of cardiac function. AT2R triggered effects were not significantly different and should be analyzed in interplay with its opposing receptor AT1.