MONDO_0800442 (MYH-6 related congenital heart defects) can be described as follows. A heart disease that is present at birth that is caused by a variation in MYH-6. Representative examples include atrial septal defect, ventricular septal defect, tetralogy of Fallot and hypoplastic left heart syndrome. Also known as: MYH6 related congenital heart defects.