What causes the coarctation of the aorta?

Congenital. It is a cogenital defect and is present in utero ( before birth).
Narrowing. Coarctation usually occurs near the site of the pda. The PDA is a normtal channel in the fetal circulation which helps blood bypass the lungs (since fetuses don't breathe). When the baby is born, the PDA constricts and closes. In some patients, the aorta also become constricted and leads to coarctation.
Born with it. Coarctation is a form of congenital heart disease. One is born with the defect. It can be surgically corrected.

Related Questions

Does any one know what causes the coarctation of the aorta in people?

Abnormal embryology. By definition coarctation of the aorta is a abnormality of vascular embryology. At birth flow is adequate for the limited activity i the new born and early toddler years, but as children age, their growing bodies and activity out grows the narrowed aorta's ability to supply enough blood fast enough to keep up. Read more...

What are the causes coarctation of the aorta?

Narrowing. Coarctation usually occurs near the site of the pda. The PDA is a normal channel in the fetal circulation which helps blood bypass the lungs (since fetuses don't breathe). When the baby is born, the PDA constricts and closes. In some patients, the aorta also become constricted and leads to coarctation. Read more...

Can coarctation of aorta cause cyanosis? Is cyanosis due to hypoxia?

Not in isolation. Coarctation only causes cyanosis when it is associated with other heart disease that allows blue blood to cross over to the red blood side. Cyanosis occurs in two situations: 1. When blue blood gets to the red blood side ("right-to-left shunting) or 2. When blood is not fully oxygenated in the lungs ("pulmonary venous desaturation"). Read more...

Why coarctation of aorta in infantile, cause passes of the blood from pulmonary artery to the aorta through pda?

Other. Blood flows from higher pressure to lower pressure. Aorta higher, pa lower usually. Coarctation distal to PDA cause higher aortic pressure spikes with obstruction and higher pa flow from aorta to pa through the pda-patent ductus arteriosus. Read more...
Coarctation . The narrowed aorta causes a lower pressure beyond the narrowing which allows flow from the PDA into the aorta. Read more...
Ductal dependence. Coarctation is usually associated with a small ao arch and/or aortic stenosis. If this is the case, the only way blood can get to the body (or systemic circulation) is thru the pda. The PDA is often associated with the coarctation and the narrowing may worsen as the PDA closes. This is why the coarctation may be "ductal dependent". Read more...
Plumbing! Blood must get to the body, else the fetus would not survive. The same is true once the baby is born. In utero, blood flows from pulm artery (pa) to aorta (ao) normally. Once born, the blood continues to flow this way so that blood can get to the body. When the PDA closes, the child becomes very sick. Read more...

Why coarctation of aorta gets worsen with vsd?

Pulmonary flow. Because vsd causes increased pulmonary flow, pulmonary hypertension and congestive heart failure so it is an added burden in coarctation of aorta, as saturated blood goes to rv and pa. Read more...
More info. A vsd doesn't worsen coarctation. They are 2 heart defects that can be seen together with some frequency, but the vsd doesn't make the other worse. Read more...

What chromosome abnormalities are accompanied by coarctation of aorta?

See below: Doctors don't know for sure why certain people are born with coarctaton of the aorta (coa). Coa is fairly common in girls born with turner syndrome, a genetic disorder in which one of a girl's two x chromosomes is incomplete or missing. Read more...
Turner syndrome. Turner syndrome (45 xo) is the most common chromosomal problem seen in association with coarctation of the aorta. Read more...

Why doesn't coarctation of aorta affect the 1st and 2nd intercostal arteries?

Coarctation of aorta. Coarctation of the aorta is a narrowing of the aorta, so if the narrowing is below the 1st or 2nd intercostal artery then likely those arteries would not be affected. Also there is a good collateral circulation along the spinal cord which helps to protect the circulation. Read more...