The cause of Takayasu arteritis is unknown.
People may have general symptoms, such as fever or muscle or joint aches, followed by specific symptoms depending on which organs are affected.
An imaging test of the aorta is done to confirm the diagnosis.
A corticosteroid and sometimes another drug that suppresses the immune system can usually control the inflammation.
(See Overview of Vasculitis Overview of Vasculitis Vasculitic disorders are caused by inflammation of the blood vessels (vasculitis). Vasculitis can be triggered by certain infections or drugs or can occur for unknown reasons. People may have... read more .)
Takayasu arteritis is rare. It is more common among Asians but occurs worldwide. It affects mostly women aged 15 to 30. The cause of Takayasu arteritis is unknown.
The aorta and its branches, including arteries that take blood to the head and the kidneys, become inflamed. In about half of people, the pulmonary arteries are also affected. Inflammation may cause sections of these arteries to become narrow or blocked. The walls of the aorta or its branches may thicken, resulting in a bulge (aneurysm). The affected arteries cannot provide enough blood to the tissues they supply.
Symptoms of Takayasu Arteritis
Takayasu arteritis is a chronic disorder with symptoms that fluctuate in severity.
Sometimes the disorder begins with fever, muscle and joint aches, loss of appetite, weight loss, and night sweats. But usually, symptoms occur when an artery narrows, reducing blood flow to part of the body, as in the following:
Arms or legs: The arms ache and tire easily when repetitive arm movements are done or the arms are elevated for a long period of time. When walking, people may feel pain, usually in the calves—a symptom called claudication Symptoms . The pulse and blood pressure may be decreased in one or both arms or legs.
Head: People may feel dizzy or faint, have headaches, or have problems with vision. Less often, a stroke results.
Heart: Sometimes blood flow to the heart is reduced, and angina Angina Angina is temporary chest pain or a sensation of pressure that occurs while the heart muscle is not receiving enough oxygen. A person with angina usually has discomfort or pressure beneath the... read more or a heart attack Acute Coronary Syndromes (Heart Attack; Myocardial Infarction; Unstable Angina) Acute coronary syndromes result from a sudden blockage in a coronary artery. This blockage causes unstable angina or a heart attack (myocardial infarction), depending on the location and amount... read more results.
Kidneys: The kidneys may malfunction because the arteries that supply blood to the kidneys become narrowed. This narrowing can result in high blood pressure. High blood pressure High Blood Pressure increases the risk of kidney failure Kidney Failure , strokes Overview of Stroke A stroke occurs when an artery to the brain becomes blocked or ruptures, resulting in death of an area of brain tissue due to loss of its blood supply (cerebral infarction) and symptoms that... read more , and heart attacks Acute Coronary Syndromes (Heart Attack; Myocardial Infarction; Unstable Angina) Acute coronary syndromes result from a sudden blockage in a coronary artery. This blockage causes unstable angina or a heart attack (myocardial infarction), depending on the location and amount... read more .
Some people do not have any symptoms. In other people, the disorder progresses, causing serious complications such as strokes, heart failure, heart attacks, kidney failure, and aneurysms.
Diagnosis of Takayasu Arteritis
A doctor's evaluation
Doctors suspect Takayasu arteritis based on the following, especially in young women:
Blood pressure cannot be measured in one or both arms.
Blood pressure is much higher or the pulse is much stronger in one arm or leg than in the other.
Blood pressure is unexpectedly high.
A person has a disorder such as stroke, angina, heart attack, or kidney damage that has no apparent explanation and that is unexpected.
Doctors ask about symptoms, review the person’s medical history, and do a complete physical examination to exclude other disorders that may cause similar symptoms. Doctors measure blood pressure in both arms and both legs. Arms and legs that have lower blood pressure may have narrowed arteries. To get an accurate blood pressure measurement, doctors measure blood pressure in a limb where arteries have not been narrowed by the disease.
Blood tests and urine tests are done. They cannot identify the disorder but may confirm that inflammation is present.
To confirm the diagnosis of Takayasu arteritis, doctors do imaging tests such as magnetic resonance angiography Magnetic resonance angiography (MRA) In magnetic resonance imaging (MRI), a strong magnetic field and very high frequency radio waves are used to produce highly detailed images. MRI does not use x-rays and is usually very safe... read more or computed tomography (CT) angiography CT angiography In computed tomography (CT), which used to be called computed axial tomography (CAT), an x-ray source and x-ray detector rotate around a person. In modern scanners, the x-ray detector usually... read more , or sometimes conventional angiography Angiography In angiography, x-rays are used to produce detailed images of blood vessels. It is sometimes called conventional angiography to distinguish it from computed tomography (CT) angiography and magnetic... read more (also called arteriography), to evaluate the aorta and its branches. For conventional or CT angiography, a contrast agent that can be seen on x-rays (radiopaque contrast agent) is injected into blood vessels to outline them. Then x-rays are taken. Magnetic resonance angiography does not require the injection of a dye. These procedures can detect aneurysms and show where the arteries are narrowed and where the vessel walls are thickened.
After Takayasu arteritis is diagnosed, regular doctor visits should be scheduled so that the doctor can check whether the disorder is progressing.
Prognosis for Takayasu Arteritis
For 20% of people, the disorder occurs once and does not return. For the rest, the disorder goes away and returns or is chronic and progressively worsens. Even when symptoms and laboratory test abnormalities suggest the disorder is not active, new symptoms occur or an abnormality is seen during imaging studies. The prognosis is poorer for people whose disorder is progressively worsening and who have complications (such as high blood pressure, heart failure, or aneurysms).
Treatment of Takayasu Arteritis
Sometimes other immunosuppressants
Drugs to treat high blood pressure
Corticosteroids (such as prednisone) are usually used. They effectively reduce inflammation in most people. Sometimes another drug that suppresses the immune system Overview of the Immune System The immune system is designed to defend the body against foreign or dangerous invaders. Such invaders include Microorganisms (commonly called germs, such as bacteria, viruses, and fungi) Parasites... read more (immunosuppressant), such as azathioprine, cyclophosphamide, mycophenolate mofetil, or methotrexate, is also used. Tumor necrosis factor inhibitors, such as infliximab, may also be effective. Tocilizumab, another drug that decreases inflammation, may help some people. However, drugs may not completely control symptoms in about one fourth of people.
How long drugs should be given has not been determined. The dose of the corticosteroid is gradually reduced, and the drug is eventually stopped because these drugs, especially when used for a long time, can have serious side effects. When drugs are stopped, symptoms return in about one half of people, so the drugs may need to be restarted.
High blood pressure must be controlled to prevent complications (see Treatment of High Blood Pressure Treatment High blood pressure (hypertension) is persistently high pressure in the arteries. Often no cause for high blood pressure can be identified, but sometimes it occurs as a result of an underlying... read more ). Angiotensin-converting enzyme (ACE) inhibitors are often used. Taking a low dose of aspirin is usually recommended to help decrease the risk of clotting in the inflamed artery, which can lead to blockages. If an artery that supplies the heart is blocked, a heart attack can result.
Bypass surgery may be used to re-establish blood flow. For example, if people have difficulty using their arms or walking, bypass surgery may be done to restore the blood flow to the affected limb. Another bypass surgery, coronary artery bypass grafting Coronary Artery Bypass Grafting Coronary artery disease is a condition in which the blood supply to the heart muscle is partially or completely blocked. The heart muscle needs a constant supply of oxygen-rich blood. The coronary... read more , may be needed to restore blood flow to heart muscle if the arteritis affects the heart arteries. Alternatively, a procedure such as percutaneous transluminal coronary angioplasty Percutaneous Coronary Intervention Coronary artery disease is a condition in which the blood supply to the heart muscle is partially or completely blocked. The heart muscle needs a constant supply of oxygen-rich blood. The coronary... read more ) may be used, depending on the symptoms, but may not work as well as bypass surgery.
The following English-language resource may be useful. Please note that THE MANUAL is not responsible for the content of this resource.
Vasculitis Foundation: Provides information for patients about vasculitis, including how to find a doctor, learn about research studies, and join patient advocacy groups