Common Types of Heart Defects | American Heart Association

Complete Atrioventricular Canal defect (CAVC) A large hole in center of the heart affecting all four chambers where they would normally be divided. When a heart is properly divided, the oxygen-rich blood from the lungs does not mix with the oxygen-poor blood from the body. A CAVC allows blood to mix and the chambers and valves to not properly …

https://www.heart.org/en/health-topics/congenital-heart-defects/about-congenital-heart-defects/common-types-of-heart-defects