Arteriovenous Malformations (AVMs) are defects in your vascular system. Your vascular system is your body’s network of blood vessels. It includes your Arteries, which carry oxygen-rich blood from your heart to your tissues and organs Veins, which carry the blood and waste products back to your heart Capillaries, which are tiny blood vessels that connect your small arteries to your small veins.
AVM is a snarled tangle of arteries and veins. They are connected to each other, with no capillaries. That interferes with the blood circulation in an organ.
AVMs are rare. The cause of AVMs is unknown, but they seem to develop during pregnancy or soon after birth. Doctors use imaging tests to detect them.
AVMs can happen anywhere, but they are more common in the brain or spinal cord. Most people with brain or spinal cord AVMs have few, if any, major symptoms. Sometimes they can cause seizures or headaches.
Medicines can help with the symptoms of AVMs. The greatest danger is hemorrhage. Treatment for AVMs can include surgery or focused radiation therapy. Because surgery can be risky, you and your doctor need to make a decision carefully.
Courtesy of MedlinePlus from the National Library of Medicine