What is aortic ASVD?
Atrioventricular septal defect (ASVD) is a general term for a group of rare heart defects that are present at birth (congenital). Infants with ASVDs have improperly developed atrial and ventricular septa and adjoining valves. The normal heart has four chambers.
What are the causes of ASVD?
A complete AVSD arises during pregnancy when the common valve fails to separate into the two distinct valves (tricuspid and mitral valves) and when the septa (walls) that split the upper and lower chambers of the heart do not grow all the way to meet in the center of the heart.
Do all babies with AVSD have Down syndrome?
Various studies place the incidence rate between 30 and 47 percent of CHDs in children with Down syndrome, according to the book Advances in Research on Down Syndrome. A study from the International Journal of Cardiology estimates that AVSD accounts for just 7 percent of CHDs diagnosed in all children.
What are the complications of ASVD?
Possible complications of atrioventricular canal defect include:Enlargement of the heart. Increased blood flow through the heart forces it to work harder than normal, causing it to become larger.High blood pressure in the lungs (pulmonary hypertension). Respiratory tract infections. Heart failure.23 Jul 2021
What age can you tell Down syndrome?
An ultrasound and quadruple marker screen (QMS) test can help identify Down syndrome and other defects in the brain and spinal cord. This test is done between 15 and 20 weeks of pregnancy. If any of these tests arent normal, youll be considered at high risk for birth defects.