Evolutionary persistence of spongy myocardium in humans

A15-year-old boy underwent successful cardiac transplantation for severe congestive heart failure. His sister had died at the age of 9 years of undefined congenital heart disease. At the age of 10 years, during a school medical screening, the patient was diagnosed with a cardiomyopathy. At cardiac catheterization, the right ventricle disclosed an increased trabecular pattern, …