Coarctation of the Aorta: Symptoms, Causes, Diagnosis, Treatment & Complete Guide

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026

Quick Answer: What Is Coarctation of the Aorta?

Coarctation of the aorta is a narrowing in part of the aorta, the body's main artery, which forces the heart to pump harder. It is usually present at birth. Treatment with medication, catheter procedures such as balloon angioplasty with stenting, or surgery is usually successful, but lifelong checkups are needed to track blood pressure and complications.

What the research says

• High blood pressure is common even after a successful repair. A systematic review of studies on hypertension after coarctation repair found a mean prevalence of 47.3% (range 20–70%), rising to 57.8% when 24-hour blood pressure recording was added to standard measurements, with a progressive pattern over time. (Panzer et al., Transl Pediatr, 2022) [3]

• Turner syndrome with a 45,X karyotype carries a much higher coarctation risk. A meta-analysis of 25 studies found that people with Turner syndrome and a 45,X karyotype had higher odds of aortic coarctation than those with other Turner karyotypes (pooled OR 4.16, 95% CI 2.74–6.31), and of bicuspid aortic valve (pooled OR 3.14, 95% CI 2.49–3.94). (Álvarez-Nava et al., Am J Med Genet C Semin Med Genet, 2025) [4]

• Coarctation is one of the risk factors for aortic complications. In a systematic review and meta-analysis of 21 studies of adult women with Turner syndrome, risk factors for aortic dilation or dissection included older age, bicuspid aortic valve, aortic coarctation, and hypertension; the pooled incidence of aortic dissection was 164 per 100,000 patient-years. (Meccanici et al., Expert Rev Cardiovasc Ther, 2023) [5]

Coarctation of the Aorta at a Glance

Feature	Summary
Definition	A narrowing in part of the aorta, the body's main artery, that forces the heart to pump harder
Onset	Usually present at birth (congenital heart defect); rarely occurs later in life
Key sign	Blood pressure high in the arms but low in the legs; weaker pulse in the legs
Common symptoms	Infants: breathing/feeding trouble, sweating, irritability, blue-gray skin; adults: chest pain, high blood pressure, headaches, leg cramps, cold feet, nosebleeds
Risk factors	Male sex, genetic conditions (e.g., Turner syndrome), other congenital heart defects
Diagnosis	Arm/leg blood pressure check, heart murmur, and imaging: echocardiogram, chest X-ray, cardiac MRI, CT scans, cardiac catheterization
Main treatments	Blood pressure medicines; balloon angioplasty and stenting; surgery (resection, bypass graft, patch aortoplasty)
Prognosis	Treatment is usually successful, but lifelong checkups are required
Without treatment	Kidney failure, heart failure, or death

What Is Coarctation of the Aorta?

Coarctation of the aorta (pronounced ko-ahrk-TAY-shun) is a narrowing of part of the aorta — the main artery of the body. The condition forces the heart to work harder to pump blood, and the heart must pump more forcefully to send blood through the aorta and on to the rest of the body.

It is usually present at birth, which makes it a congenital heart defect — one that happens as the baby (fetus) grows in the womb during pregnancy. However, the condition can sometimes occur later in life.

Two things are important to understand from the start:

• 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.

How coarctation of the aorta narrows the main artery, raising pressure in the arms and lowering it in the legs. Source: rinnit.com

How do coarctation of the aorta symptoms differ in infants and adults?

Symptoms of coarctation of the aorta depend on how much of the aorta is narrowed — and most people don't have symptoms. Adults and older children with mild coarctation may have no symptoms at all; their hearts may even seem healthy.

Symptoms in Infants

If a baby is born with an extreme narrowing of the aorta, symptoms may appear shortly after birth:

• Trouble breathing

• Trouble feeding

• Heavy sweating

• Irritability

• Blue or gray skin, lips, and fingernails (these changes may be harder or easier to see depending on skin color)

Symptoms Later in Life

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

• Chest pain

• High blood pressure

• Headaches

• Muscle weakness

• Leg cramps

• Cold feet

• Nosebleeds

Because coarctation often occurs with other heart conditions present at birth, additional symptoms can appear depending on the types of congenital heart defects involved.

When to Seek Immediate Medical Help

Always get medical help right away for chest pain that is sudden or unexplained. Also seek medical care for:

• Fainting

• Sudden shortness of breath

• High blood pressure that can't be explained

Many different health conditions can cause these symptoms — a complete health checkup is needed to learn the cause.

What causes coarctation of the aorta, and who is at risk?

The cause of coarctation of the aorta is often unknown, and risk is higher with male sex, some genetic conditions such as Turner syndrome and some congenital heart defects.

Causes

The cause of coarctation of the aorta is not clear. It is usually a heart condition present at birth — the cause is often simply not known.

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

• Traumatic injury

• Atherosclerosis — a buildup of fats, cholesterol, and other substances in and on the artery walls

• Takayasu arteritis — a rare type of swelling and irritation of blood vessels in the heart

Risk Factors

Three factors may raise the risk of coarctation of the aorta:

• Male sex

• Some genetic conditions, such as Turner syndrome

• Some congenital heart defects

Heart Conditions That Often Occur Alongside It

Several other birth heart defects can occur together with coarctation of the aorta:

Condition	What It Is
Bicuspid aortic valve	The aortic valve — located between the lower left heart chamber and the aorta — normally has three cusps (flaps). A bicuspid valve has only two
Subaortic stenosis	A narrowing of the area below the aortic valve that blocks blood flow from the lower left chamber to the aorta
Patent ductus arteriosus	The ductus arteriosus connects the lung arteries to the aorta and lets blood go around the lungs while in the womb; it usually closes shortly after birth, but stays open ("patent") in some babies
Holes in the heart	A hole between the upper chambers is an atrial septal defect; a hole between the lower chambers is a ventricular septal defect
Congenital mitral valve stenosis	The valve between the upper and lower left chambers is narrowed or small, making it harder for blood to move through

Why is untreated coarctation of the aorta dangerous?

The mechanics are straightforward: because the lower left heart chamber has to work harder to push blood through the narrowed artery, blood pressure rises inside that chamber, and the chamber wall can thicken — a condition called ventricular hypertrophy.

From there, complications of coarctation of the aorta can include:

• Aortic aneurysm — a bulge in the wall of the aorta

• Brain aneurysm — a bulge or ballooning in a blood vessel in the brain

• Aortic dissection — a rupture or tear in the aorta

• Bleeding in the brain

• Coronary artery disease

• High blood pressure that doesn't go away — pressure usually drops after surgery, but may still remain higher than usual

• Stroke

Without treatment, coarctation of the aorta may lead to kidney failure, heart failure, or even death.

Even after treatment, some people experience complications, including recoarctation (repeat narrowing of the aorta) and aortic aneurysm or rupture. That is why lifelong checkups are the best protection.

Can coarctation of the aorta be prevented?

There is no known way to prevent coarctation of the aorta. However, you should tell your healthcare team if anyone in your family was born with a heart condition — that family history can guide screening and care.

How is coarctation of the aorta diagnosed?

Diagnosis may depend on how severe the condition is. Severe coarctation is usually found soon after birth, and it may even be seen on ultrasound images taken during pregnancy. If the condition is mild, it may not be found until later in life. [2]

The Physical Exam Clues

The most telling first clues come from a simple exam. A healthcare professional checks blood pressure in the arms and legs — depending on which part of the aorta is affected, blood pressure may be high in the arms and low in the legs and ankles. The pulse may be weaker or slower in the legs compared with the arms.

A whooshing sound called a heart murmur may also be heard when listening to the heart.

Diagnostic Tests

Tests used to diagnose coarctation of the aorta may include:

Test	What It Shows
Echocardiogram	Sound waves make pictures of the beating heart — its chambers, valves, and blood movement. It can often show which part of the aorta is narrowed and how much, and helps plan treatment
Chest X-ray	Shows the condition of the heart and lungs; might show the narrowing in the aorta
Cardiac MRI	Magnetic fields and radio waves create detailed images of the heart and blood vessels; shows which part and how much of the aorta is narrowed, and may guide treatment
CT scan of the heart	Several X-rays make detailed pictures; used when other tests don't give enough information
Cardiac catheterization with angiogram	A thin flexible tube (catheter) is guided through a blood vessel — usually in the groin or wrist — to the heart; contrast dye makes arteries easier to see on X-ray pictures; can show how much the aorta is narrowed and measure pressure in the heart and blood vessels
CT angiogram	A powerful X-ray machine with contrast shows how blood flows through the arteries; shows where and how severe the coarctation is, whether other blood vessels are affected, and can guide treatment

The complete guide to coarctation of the aorta — from symptoms by age to treatment and lifelong care. Source: rinnit.com

How is coarctation of the aorta treated?

Treatment depends on how old the person is when the condition is diagnosed and how much of the aorta is narrowed. It may include medicines, a heart procedure, or surgery — and if other congenital heart defects are present, they may be fixed at the same time. [2]

Medications

• Blood pressure medicines — used to control blood pressure before repair surgery. Even after the aorta is fixed, many people still need blood pressure medication.

• Medicine to keep the ductus arteriosus open — babies are born with a temporary opening between the aorta and the pulmonary artery that usually closes soon after birth. In severe cases, medicine keeps it open until surgery fixes the aorta.

Surgery and Catheter Procedures

Procedure	How It Works
Balloon angioplasty and stenting	Often the first treatment — or used if the aorta narrows again after surgery. A doctor uses a catheter and a tiny balloon to open the narrowed artery, then usually places a small metal mesh tube (stent) to keep the artery open and lower the risk of re-narrowing
Resection with end-to-end anastomosis	The surgeon removes the narrowed part of the aorta (resection) and connects the two healthy parts together (anastomosis)
Bypass graft repair	A tube (graft) creates a new path for blood to flow around the narrowed area
Patch aortoplasty	The surgeon cuts across the narrowed area and patches in a piece of material to widen it — useful when the coarctation involves a long part of the aorta

After aortic repair surgery, health checkups are needed for life to keep track of blood pressure and watch for complications.

Which heart-healthy lifestyle steps help after coarctation of the aorta?

After coarctation of the aorta, managing blood pressure and keeping the heart healthy matters more than ever. Try these heart-healthy steps:

1. Do not smoke or use tobacco. If you need help quitting, talk with your healthcare team.

2. Eat healthy foods. Choose plenty of fruits, vegetables, and whole grains. Limit sugar, salt, and trans and saturated fats.

3. Exercise and stay active. Talk with your healthcare team about the right amount and type — some activities, such as weightlifting, can temporarily raise blood pressure.

4. Manage weight. Ask your team what a healthy weight is for you.

5. Manage blood pressure, cholesterol, and diabetes. Ask how often you need checkups.

6. Lower and manage stress. Get more exercise, practice mindfulness, and connect with others in support groups.

7. Get good sleep. Adults should try to get 7 to 9 hours of sleep daily.

Two Important Conversations to Have

Pregnancy. Coarctation of the aorta — even after it is fixed — may raise the risk of an aortic tear or rupture during pregnancy and childbirth. Before becoming pregnant, talk with an adult congenital cardiologist (a doctor trained in congenital heart diseases) to review the possible risks and complications.

Antibiotics before dental work. Bacteria can infect the inner lining of the heart or valves, causing endocarditis. People with some heart conditions may need preventive antibiotics before dental work — ask your healthcare professional whether you need them.

How should you prepare for an appointment about coarctation of the aorta?

If coarctation is diagnosed at birth, there may not be time to prepare. If symptoms appear later in life, see a congenital cardiologist — a doctor trained in heart conditions present at birth.

What You Can Do Before the Visit

Write down the following and bring your notes:

1. Any symptoms, even ones that don't seem related to your heart — including when each symptom began.

2. Important medical information, including any family history of congenital heart conditions.

3. All medicines, vitamins, and supplements you take, with doses — including over-the-counter products and anything taken during pregnancy.

4. Any questions you want to ask.

If possible, ask someone to go with you — they can help remember what the health professional says.

Questions to Ask Your Healthcare Professional

• How is coarctation of the aorta treated?

• What treatment do you recommend, and why?

• What is recovery and rehabilitation like after treatment or surgery?

• How often do I need follow-up tests and checkups?

• What is the risk of complications from this condition?

• What symptoms or warning signs should I watch for?

• What is the long-term outlook?

• How should I change my diet, exercise, and sports activities?

• Are antibiotics needed before dental work or other medical procedures?

• Is pregnancy safe for someone with coarctation of the aorta?

• What is the risk that my — or my child's — future children will have coarctation?

Do not hesitate to ask any other questions.

Questions Your Doctor Will Likely Ask

If the doctor suspects coarctation in a child, expect questions such as:

• When did you first notice your child's symptoms? Can you describe them?

• Does your child have breathing trouble, tire easily, sweat heavily, or seem irritable?

• Does your child have chest pain or often have cold feet?

• When do these symptoms happen — and do they come and go, or are they constant?

• Are the symptoms getting worse? What makes them better or worse?

• Do you have a family history of congenital heart defects?

If you are an adult with coarctation, the doctor may ask:

• When did the symptoms start, and have they worsened over time?

• Does exercise or activity make your symptoms worse?

• Have you been diagnosed with any other medical conditions?

• Do you have a family history of heart conditions?

• Are you planning to become pregnant in the future?

Frequently Asked Questions (FAQ)

What is coarctation of the aorta?

Coarctation of the aorta is a narrowing in part of the aorta — the body's main artery. The narrowing forces the heart to work harder to pump blood to the rest of the body. It is usually a congenital heart defect (present at birth), but it can occasionally develop later in life.

What are the symptoms of coarctation of the aorta?

Symptoms depend on how much the aorta is narrowed, and most people have no symptoms. Infants with extreme narrowing may show trouble breathing or feeding, heavy sweating, irritability, and blue-gray skin, lips, or fingernails. Older children and adults may have chest pain, high blood pressure, headaches, muscle weakness, leg cramps, cold feet, or nosebleeds.

Is coarctation of the aorta present at birth?

Yes, in most cases — it is a congenital heart defect that develops as the fetus grows in the womb, and the cause is often unknown. Rarely, it can occur later in life due to traumatic injury, atherosclerosis, or Takayasu arteritis.

How is coarctation of the aorta diagnosed?

A doctor checks blood pressure in the arms and legs — pressure is typically high in the arms and low in the legs, with a weaker pulse in the legs — and listens for a heart murmur. Imaging tests such as an echocardiogram, chest X-ray, cardiac MRI, CT scan, cardiac catheterization with angiogram, or CT angiogram confirm the diagnosis and show exactly where and how severe the narrowing is.

Can coarctation of the aorta be cured?

Treatment is usually successful. Options include blood pressure medicines, balloon angioplasty with stenting, and surgeries such as resection with end-to-end anastomosis, bypass graft repair, or patch aortoplasty. Even after repair, lifelong checkups are needed because blood pressure may stay elevated and the aorta can narrow again (recoarctation) or form an aneurysm.

What happens if coarctation of the aorta is not treated?

The extra strain on the lower left heart chamber thickens its wall (ventricular hypertrophy) and raises pressure inside it. Untreated coarctation can lead to aortic or brain aneurysms, aortic dissection, brain bleeding, coronary artery disease, lasting high blood pressure, and stroke — and, without treatment, kidney failure, heart failure, or death.

Who is at higher risk for coarctation of the aorta?

Risk is higher in people assigned male at birth, those with certain genetic conditions such as Turner syndrome, and those with other congenital heart defects — especially bicuspid aortic valve, subaortic stenosis, patent ductus arteriosus, holes in the heart, or congenital mitral valve stenosis.

Conclusion

Coarctation of the aorta is a fixable heart defect with a lifelong follow-up plan. The main lessons from this guide are: coarctation of the aorta is a narrowing of the body's main artery that forces the heart to work harder — usually present at birth, often hidden, and frequently found alongside other congenital heart defects; symptoms range from nothing at all to serious warning signs — breathing and feeding trouble in infants, and chest pain, unexplained high blood pressure, cold feet, leg cramps, and nosebleeds later in life, with immediate help needed for sudden chest pain, fainting, or sudden shortness of breath; and treatment is usually successful — with medicines, balloon angioplasty and stenting, or surgery — but lifelong checkups are the key to catching recoarctation, aneurysms, and blood pressure problems early.

We hope this guide has given you a clear understanding of what coarctation of the aorta is, how it is recognized, diagnosed, and treated, and what life looks like after repair.

What to do next: Because coarctation can involve the aorta, it is closely related to our complete guide to aortic aneurysms. Explore more in-depth health guides on rinnit.com.

This content is provided for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number.

References

1. Mayo Clinic Staff. Coarctation of the aorta — Symptoms and causes. Mayo Clinic. August 15, 2026. https://www.mayoclinic.org/diseases-conditions/coarctation-of-the-aorta/symptoms-causes/syc-20352529

2. Mayo Clinic Staff. Coarctation of the aorta — Diagnosis and treatment. Mayo Clinic. August 15, 2026. https://www.mayoclinic.org/diseases-conditions/coarctation-of-the-aorta/diagnosis-treatment/drc-20352535

3. Panzer J, Bové T, Vandekerckhove K, et al. Hypertension after coarctation repair—a systematic review. Transl Pediatr. 2022;11(2):270-279. PMID 35282025. https://doi.org/10.21037/tp-21-418

4. Álvarez-Nava F, Crenshaw ML, Bedei I, et al. The impact of karyotype on congenital heart diseases in Turner syndrome: a systematic review and meta-analysis. Am J Med Genet C Semin Med Genet. 2025;199(2):93-106. PMID 40557696. https://doi.org/10.1002/ajmg.c.32146

5. Meccanici F, de Bruijn JWC, Dommisse JS, et al. Prevalence and development of aortic dilation and dissection in women with Turner syndrome: a systematic review and meta-analysis. Expert Rev Cardiovasc Ther. 2023;21(2):133-144. PMID 36688313. https://doi.org/10.1080/14779072.2023.2172403