Endocardial Cushion Defects

**Definition:** A spectrum of septal defects involving the ATRIAL SEPTUM; VENTRICULAR SEPTUM; and the atrioventricular valves (TRICUSPID VALVE; BICUSPID VALVE). These defects are due to incomplete growth and fusion of the ENDOCARDIAL CUSHIONS which are important in the formation of two atrioventricular canals, site of future atrioventricular valves.

**Tree numbers:** - C14.240.400.560.350 - C14.280.400.560.350 - C16.131.240.400.560.350

**Synonyms:** - Endocardial Cushion Defect