Polyvalvular Dysplasia and Vascular Abnormalities in a Neonate With an FLNA Variant.

There is growing appreciation for inherited structural heart diseases and their genetic causes. One causal gene for congenital cardiac and vascular lesions is FLNA which encodes a critical protein for cytoskeletal and extracellular matrix development. A newborn infant male, with prenatally diagnosed polyvalvular dysfunction, presented with low cardiac output and postnatally detected aortic arch hypoplasia and coarctation. Attempted palliative coarctation intervention resulted in vascular complications that ultimately contributed to his demise. This case report highlights polyvalvular dysplasia, vascular abnormalities, and a likely causal de novo missense variant in the FLNA gene (c.5180 C>T p.P1727L) not previously described.