Cardiac Amyloidosis: Light chain cardiac amyloidosis—bone marrow disease [100]; Transthyretin amyloidosis—hereditary or senile [100].  Cardiac Sarcoidosis: Response of the immune system to an unknown antigenic trigger [101].  Barth syndrome: Mutation of the TAFAZZIN gene [80].  AHA-defined HCM: Monogenetic disorder caused by a sarcomeric or sarcomere-associated mutation [7,92].  etc. The gene discussed is TAFAZZIN; the disease is Barth syndrome.