Endocardium Minimally Contributes to Coronary Endothelium in the Embryonic Ventricular Free Walls

Our study suggested that SV, but not endocardium, is the major origin for coronary endothelium in the embryonic ventricular free walls. This work thus resolves the recent controversy over the developmental origin of coronary endothelium, providing the basis for studying coronary vessel formation and regeneration after injury.