Takayasu Arteritis
Inflammation of the aorta and its major branches
Quick Facts
- Type: Large-vessel vasculitis
- Most affected: Women under 40
- Main vessels: Aorta and its branches
- Hallmark sign: Weak or absent pulses
Overview
Takayasu arteritis is a rare type of vasculitis, which means inflammation of blood vessels. It mainly affects the aorta, the large artery that carries blood from the heart, along with the major branches that supply the head, arms, and organs. Over time the inflammation thickens and scars the artery walls, which narrows the vessels and reduces blood flow. In some areas the wall can weaken and balloon outward, forming an aneurysm.
The condition is sometimes called pulseless disease because a common finding is a weak or missing pulse in one or both arms. It most often begins in women under the age of 40, though it can occur in men and at other ages. With treatment to control inflammation, many people lead full lives, but ongoing monitoring is important because the disease can flare and damage arteries silently.
Symptoms
Takayasu arteritis often develops in two phases. An early, general phase may cause vague symptoms, followed by a phase in which narrowed arteries reduce blood flow.
- Fatigue, low-grade fever, and unintended weight loss
- Aching or weakness in the arms or legs, especially with use
- A weak, absent, or unequal pulse between the two arms
- A noticeable difference in blood pressure between the arms
- Lightheadedness, headaches, or visual changes
- Chest or abdominal pain
Some people have no early symptoms and are diagnosed only after a difference in pulses or blood pressure is found during an examination.
Causes
The exact cause of Takayasu arteritis is not known. It is considered an autoimmune condition, in which the immune system mistakenly attacks the body's own large arteries and triggers inflammation in their walls. This inflammation leads to thickening, narrowing, and sometimes scarring or weakening of the vessel.
Researchers believe a combination of genetic and environmental factors may play a role, but no single trigger has been identified. It is not contagious and is not caused by diet or lifestyle.
Risk Factors
- Female sex, by a wide margin
- Age under 40 at onset
- Asian ancestry, where the condition is more frequently reported, though it occurs worldwide
- A family history of autoimmune disease in some cases
Diagnosis
Diagnosis can be challenging because early symptoms are nonspecific. Doctors combine a physical exam with imaging of the large arteries.
- Physical exam: Checking pulses, listening for abnormal sounds (bruits) over arteries, and comparing blood pressure in both arms.
- Imaging: Magnetic resonance angiography (MRA), CT angiography, ultrasound, or PET scans to show narrowing, thickening, or aneurysms in the aorta and its branches.
- Blood tests: Markers of inflammation such as ESR and CRP, which are often raised during active disease.
Treatment
Treatment aims to control inflammation, prevent further artery damage, and manage complications such as high blood pressure.
- Corticosteroids: Medicines such as prednisone are usually the first treatment to calm active inflammation.
- Other immune-suppressing drugs: Medications like methotrexate or biologic agents may be added to control disease and reduce reliance on steroids.
- Blood pressure control: Important because narrowed kidney arteries can drive hypertension.
- Procedures: When narrowing or aneurysms threaten blood flow, angioplasty, stenting, or bypass surgery may be considered, ideally when inflammation is under control.
Treatment is usually long-term, and regular imaging helps track the arteries even when symptoms are quiet.
Prevention
Takayasu arteritis cannot be prevented because its cause is unknown. The focus is on early diagnosis and steady treatment to prevent complications.
- Take prescribed medication consistently and do not stop steroids suddenly
- Keep all follow-up and imaging appointments
- Monitor and control blood pressure as advised
- Report new symptoms such as arm pain, vision changes, or chest pain promptly
When to See a Doctor
See a doctor if you have persistent fatigue, fever, and weight loss with arm or leg pain on activity, or if a difference in pulse or blood pressure between your arms is noticed. Seek emergency care immediately for:
- Sudden chest or severe abdominal pain
- Signs of a stroke such as face drooping, arm weakness, or trouble speaking
- Sudden loss of vision
Frequently Asked Questions
Why is Takayasu arteritis called pulseless disease?
Inflammation narrows the large arteries that supply the arms, which can make the pulse in one or both wrists weak or impossible to feel. This sign gave the condition its older name, pulseless disease. A difference in blood pressure between the two arms is a related clue.
Who gets Takayasu arteritis?
It most commonly affects women under the age of 40, though men and people of other ages can develop it. It occurs worldwide but is reported more often in parts of Asia. The cause is not fully understood.
Is Takayasu arteritis curable?
There is no cure, but it can usually be controlled with long-term medication that suppresses inflammation. Many people do well with treatment, though regular monitoring is needed because the disease can flare or damage arteries quietly.
Can Takayasu arteritis cause a stroke?
Yes. When the arteries supplying the brain become narrowed or blocked, blood flow to the brain can drop and increase stroke risk. Sudden face drooping, arm weakness, or trouble speaking require emergency care.
How is Takayasu arteritis diagnosed?
Doctors use a physical exam to check pulses and blood pressure, blood tests for inflammation, and imaging such as MR or CT angiography to view the aorta and its branches. Imaging is key because the affected arteries are deep inside the body.
References
- National Heart, Lung, and Blood Institute (NHLBI). Vasculitis.
- Mayo Clinic. Takayasu's arteritis.
- MedlinePlus, U.S. National Library of Medicine. Takayasu arteritis.
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS). Vasculitis.