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Strong Heart and Vascular Center

Division of Vascular Surgery

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Vascular Malformations

What are Vascular Malformations?

Vascular malformations are tangles of arteries or veins that interfere with circulation. They are either present from birth or (more rarely) result from an injury later in life.

Arteriovenous malformations (involving both arteries and veins) are the most common and can grow to several inches in diameter. Although they can occur anywhere in the body, about half occur in the brain and spinal cord. When they occur in the brain and spinal cord, they present a risk for stroke, paralysis, loss of vision & speech and even death.

Other less dangerous types of vascular malformations are...

Cavernous malformations - a group of tightly packed, thin-walled blood vessels filled with slow-moving, often clotted blood that will often require treatment.
Venous malformations - benign tumors that consist of abnormally large veins separated by normal brain tissue. They cause no symptoms and can be left untreated.
Telangiectases - a group of swollen capillaries measuring less than an inch in diameter. Only when large numbers of these develop will symptoms (such as headaches or seizures) result.

 

Causes and risk factors for Vascular Malformations

There is no specific type of person more likely than others to be affected by vascular malformations.

Symptoms of Vascular Malformations

Symptoms vary depending on the type of malformation and the location. Symptoms usually won't appear until a person is in their twenties, thirties, or forties - or they may have no symptoms

Diagnosing Vascular Malformations

To diagnose vascular malformations, a physician will first listen to blood flow using a stethoscope, and the following imaging techniques can be used to locate the vascular malformations.

Treatment Options

Most people with arteriovenous malformations don’t require treatment, but when they do, treatment options include...

  • Conventional surgery - may be needed for arteriovenous malformations that are small and lie within the central nervous system to alleviate serious symptoms such as severe headaches, seizures, or history of hemorrhage or risk of hemorrhage.
  • Endovascular embolization - often used in combination with surgery to temporarily stop a malformation’s abnormal blood flow.