Coarctation of the aorta

Aortic coarctation (ko-ahrk-TAY-shun) is a narrowing of part of the aorta. The aorta is the main artery of the body. Aortic coarctation also is called coarctation of the aorta.

The condition forces the heart to work harder to pump blood. It usually is present at birth. That means it is a congenital heart defect. But sometimes the condition can occur later in life.

Coarctation of the aorta often occurs along with other congenital heart defects. Treatment to fix the condition is usually successful. But regular health checkups are needed for life to watch for changes in the heart's health.

Coarctation of the aorta

Coarctation of the aorta is a narrowing in a part of the body's main artery, called the aorta. The heart must pump more forcefully to send blood through the aorta and on to the rest of the body.

Symptoms of coarctation of the aorta depend on how much of the aorta is narrowed. Most people don't have symptoms.

Adults and older children with mild coarctation of the aorta may not have symptoms. Their hearts may seem healthy.

If a baby is born with an extreme narrowing of the aorta, symptoms may be seen shortly after birth. Symptoms of coarctation of the aorta in infants include:

• Trouble breathing.
• Trouble feeding.
• Heavy sweating.
• Irritability.
• Blue or gray skin, lips and fingernails. Depending on the skin color, these changes may be harder or easier to see.

Symptoms of coarctation of the aorta later in life may include:

• Chest pain.
• High blood pressure.
• Headaches.
• Muscle weakness.
• Leg cramps.
• Cold feet.
• Nosebleeds.

Coarctation of the aorta often occurs with other heart conditions present at birth. Other symptoms depend on the types of congenital heart defects.

The cause of coarctation of the aorta is not clear. It's usually a heart condition present at birth, called a congenital heart defect. A congenital heart defect happens as the baby, called a fetus, is growing in the womb during pregnancy. The cause is often not known.

Rarely, coarctation of the aorta can happen later in life. Conditions or events that can narrow the aorta and cause this condition include:

• Traumatic injury.
• A buildup of fats, cholesterol and other substances in and on the artery walls, called atherosclerosis.
• A rare type of swelling and irritation of blood vessels in the heart, called Takayasu arteritis.

Risk factors for coarctation of the aorta include:

• Male sex.
• Some genetic conditions, such as Turner syndrome.
• Some heart conditions present at birth, called congenital heart defects.

Congenital heart defects that can occur with coarctation of the aorta include:

• Bicuspid aortic valve. The aortic valve is between the lower left chamber of the heart and the aorta, which is the body's main artery. Typically, the aortic valve has three cusps. A bicuspid aortic valve has only two cusps.
• Subaortic stenosis. This is a narrowing of the area below the aortic valve. It blocks blood flow from the lower left heart chamber to the aorta.
• Patent ductus arteriosus. The ductus arteriosus is a blood vessel that connects the lung arteries to the aorta. When a baby is growing in the womb, this vessel lets blood go around the lungs. Shortly after birth, the ductus arteriosus usually closes. If it stays open, it's called a patent ductus arteriosus.
• Holes in the heart. Some people with coarctation of the aorta also are born with a hole in the heart. If the hole is between the upper heart chambers, it is called an atrial septal defect. A hole between the lower heart chambers is called a ventricular septal defect.
• Congenital mitral valve stenosis. This is a type of heart valve disease that some people are born with. The valve between the upper and lower left heart chambers is narrowed or small. It's harder for blood to move through the valve.

Complications of coarctation of the aorta happen because the lower left heart chamber has to work harder to pump blood through the narrowed artery. This makes blood pressure go up in the lower left heart chamber. Also, the wall of the chamber can get thick. This condition is called ventricular hypertrophy.

Complications of coarctation of the aorta include:

• A bulge in the wall of the aorta, called an aortic aneurysm.
• A bulge or ballooning in a blood vessel in the brain, also known as a brain aneurysm.
• A rupture or tear in the aorta, called an aortic dissection.
• Bleeding in the brain.
• Coronary artery disease.
• High blood pressure that doesn't go away. Blood pressure usually drops after surgery to fix the aorta, but it may still be higher than usual.
• Stroke.

Treatment may be needed right away to prevent complications. Without treatment, coarctation of the aorta may lead to:

• Kidney failure.
• Heart failure.
• Death.

Some people have complications after treatment for coarctation of the aorta. These complications include:

• Repeat narrowing of the aorta, called recoarctation.
• Aortic aneurysm or rupture.

To prevent complications, people with coarctation of the aorta need regular health checkups for life.

There's no known way to prevent coarctation of the aorta. Tell your healthcare team if anyone in your family was born with a heart condition.