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Arteriovenous Malformation (AVM): How It Affects the Body and Ways to Treat It

In arteriovenous malformations (AVMs), the feeding arteries get directly connected to a venous drainage network without any capillary system in between. This abnormal connection causes oxygenated and deoxygenated blood to mix. These tangles of poorly formed blood vessels happen due to developmental abnormality of the blood vessels. AVMs can happen anywhere in the body, while AVMs can form anywhere, brain AVMs are particularly concerning due to their risk of bleeding and potential neurological damage..

Although the exact cause of brain AVMs is unknown, it may be complex, with both genetic changes and angiogenic stimulation (the physiological process by which new blood vessels emerge from pre-existing ones) seeming to play a part in AVM development. According to studies, AVMs form during the fetal development of an individual inside the womb. However, some experts claim that the main cause of these reactions is blocked blood flow or bleeding in the vessels supplying blood to the brain tissue.

Let’s learn more about the AVMs, their effect on the body, and their treatment options in the following article.

What is Arteriovenous Malformation (AVM)?

An abnormal network of veins and arteries without capillaries in between is known as an arteriovenous malformation (AVM). It looks like a bird’s nest. This can occur in the brain or any other region of your body. Damage to the surrounding tissues or bleeding may result from an AVM. Some people experience no symptoms until an AVM ruptures. AVMs can be eliminated, shrunk, or their blood flow can be stopped by treatments.

Your body's blood flows through a well-organised, closed blood vessel circuit. Your arteries transport blood that is rich in oxygen from your heart to your brain and the other organs and tissues in your body. Waste products from tissues and blood with low oxygen and nutrition levels are returned to your heart and lungs through your veins.

The exchange typically occurs in your capillaries, which are the points of connection between the smallest blood vessel units that make up arteries and veins. The "bridge" of capillaries connecting your veins and arteries is absent if you have an AVM. As a result, veins that aren't accustomed to high blood pressure directly receive high-flow arterial blood. Consequently, an AVM's abnormal artery-vein connection may result in rupture and bleeding.

What are the Symptoms of Arteriovenous Malformation (AVM)?

If you have an arteriovenous malformation, you may or might not experience symptoms. Up to 15% of AVM patients are asymptomatic. Bleeding can often be the first indication that you have an AVM. A stroke and brain injury may result from a blood vessel bleed (rupture) caused by an AVM in the brain. A brain haemorrhage is the first symptom in almost half of patients with a brain AVM. Arteriovenous malformation symptoms are:

Neurological Symptoms: Seizures, headaches, dizziness, confusion, hallucinations.
Physical Symptoms: Muscle weakness, numbness, severe back pain, paralysis.
Systemic Symptoms: Shortness of breath, coughing up blood, abdominal pain, swelling.

What are the Causes of Arteriovenous Malformation (AVM)?

What causes arteriovenous malformations is unknown to scientists yet. They consider them to be congenital, meaning that you are born with them and that they most likely develop during foetal development. In rare cases, AVMs may run in families.

How Does an Arteriovenous Malformation Affect One’s Body?

AVMs can potentially result in following consequences:

Bleeding: Your arteries' forceful blood flow puts a lot of strain on the AVM. Veins can't always adapt to the pressure of blood flow since their walls are weak. Your veins may burst and bleed if they are unable to withstand the blood pressure. Permanent damage may result from bleeding into the surrounding tissue. Excessive bleeding may even cause death.
Pressing on body parts: Your veins fill with more blood when the connection is defective. Veins may enlarge and compress surrounding tissue. In addition to blocking oxygenation, this also affects lymphatic system drainage.
Depleting tissues of needed oxygen: Oxygen and nutrients cannot reach the tissue where an AVM is present because there is no capillary bridge connecting the arteries and veins. At this spot, nerve cells and tissue may get damaged.

What are the Types of Arteriovenous Malformation (AVM)?

Following are the various types of arteriovenous malformation (AVM):

Brain arteriovenous malformations: These can form on the outside of your brain or in any part of its tissue. Your brain, brainstem, and spinal cord are where AVMs possibly occur.
Peripheral arteriovenous malformations: These might appear anywhere along the 100,000 miles of blood blood vessels in your body. In addition to tissues and organs like your heart, liver, or lungs, they can occur on your face, arms, or legs.

What are the Arteriovenous Malformation (AVM) Treatment Options?

Arteriovenous malformation treatment is based on:

Type, size and site, and the anatomy of your AVM
Risk of AVM rupture
Associated symptoms
Age
General health

Treatment for arteriovenous malformations should ideally aim to stop bleeding or eliminate it completely. It can be treated in a number of ways. The advantages and disadvantages of any kind of intervention vary depending on your general health and the characteristics of the persisting AVM. These therapeutic options include:

Targeted radiation to the AVM
Open surgery
Catheter-based arterial blockage

Conclusion

Despite being a serious medical disease, arteriovenous malformations (AVMs) can be effectively treated. Your doctor will evaluate your AVM's size, location, and other specifics to recommend the best treatment plan. If you have any questions or concerns, don't be hesitant to ask. You owe it to yourself to understand your options.

Learn about Arteriovenous Malformation (AVM), its potential health consequences, and effective treatment options at IBS Hospital. For the best personalised AVM care, book your consultation now!.

FAQs

Q1: How does AVM affect the body?
A: AVMs can cause headaches, seizures, or neurological symptoms. In severe cases, they may lead to bleeding in the brain or other vital organs, potentially resulting in life-threatening complications.

Q2: What are the common symptoms of AVM?
A: Symptoms may include headaches, dizziness, seizures, numbness, difficulty speaking, or visual disturbances. In many cases, AVMs remain asymptomatic until complications arise..

Q3: What causes AVM to develop?
A: The exact cause of AVM is unknown, but it is believed to be a congenital condition (present at birth).

Q4: Can AVM occur anywhere in the body?
A: Yes, AVMs can develop in the brain, spinal cord, lungs, or other areas of the body. However, they are most frequently found in the bra

By -Dr Aaksha Shukla | January 28, 2025 | 9 Min Read