“…Specification, differentiation and development of cardiac progenitors are subjected to intense paracrine regulation mediated by different growth factors, particularly bone morphogenetic proteins (Bmps), fibroblastic growth factors (Fgfs), transforming growth factors (Tfgs) and Wnt signaling [ 1 , 2 , 3 ]. Importantly, these growth factor signals also contribute to additional cardiac morphogenetic processes, such as proepicardial/epicardial development [ 4 , 5 , 6 , 7 , 8 , 9 ], endocardial cushion formation [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ] and outflow tract remodeling [ 14 , 17 , 18 , 19 ]. In addition, several other signaling pathways are also required for discrete cardiovascular morphogenetic processes, such as Hippo pathway that is fundamental for cardiomyocyte proliferation and organ size determination [ 20 , 21 , 22 ], and Notch and neuregulin signaling pathways [ 23 , 24 , 25 , 26 , 27 , 28 , 29 ] that are required for ventricular morphogenesis and maturation.…”