Brain AVM Embolization

An arteriovenous malformation (AVM) is a tangle of abnormal vessels where arteries connect straight to veins without capillaries. Embolization blocks those vessels from the inside by injecting a liquid agent, glue or coils through a microcatheter steered up from the groin or wrist.

It lowers flow through the AVM and can close weak points such as aneurysms on feeding arteries. On its own it cures only a minority of brain AVMs, so it is usually a step before surgery or radiosurgery rather than a complete treatment.

What Brain AVM Embolization involves

Under general anaesthesia a catheter is passed from the femoral or radial artery to the neck arteries. Detailed angiography maps every feeder and draining vein. A microcatheter thinner than a millimetre is floated into one feeding artery until its tip sits inside the tangle, and a test injection confirms that no normal brain branch lies beyond it. A liquid embolic such as Onyx or a cyanoacrylate glue is injected slowly under continuous X-ray so that it sets within the nidus and not in the veins. The microcatheter is withdrawn, and the steps are repeated for other feeders. Large AVMs are treated in stages weeks apart to avoid sudden pressure shifts.

Who is a good candidate for Brain AVM Embolization?

Decisions are made by a team of neurosurgeon, neurointerventionalist and radiosurgery specialist, using grading scales that weigh size, location and drainage.

• AVMs that have bled, where the risk of re-bleeding is highest
• Pre-operative reduction of flow to make surgical removal safer
• Closing an associated aneurysm or a high-flow fistula within the AVM
• Shrinking a large AVM to a size suitable for radiosurgery
• Small AVMs with one or two accessible feeders, where cure by embolization alone is realistic

It is usually not the right choice if:

• Unruptured, symptom-free AVMs in many adults, where trial evidence suggests observation can be safer than intervention
• Feeders that also supply essential brain tissue and cannot be entered selectively
• Severe kidney impairment or contrast allergy, without precautions
• A sudden bleed: this needs emergency care locally, not travel

الخيارات التقنية

• Onyx or similar liquid embolic: Sets slowly like lava, allowing controlled, prolonged filling of the nidus. The most used agent.
• n-BCA glue: Sets in seconds; chosen for high-flow fistulas and very distal feeders.
• Coils: Used for feeder aneurysms or to slow flow before liquid is injected.
• Transvenous embolization: Approach through the draining vein for selected small, deep AVMs in expert hands.
• Combined plan: Embolization followed by microsurgery or Gamma Knife, which is how most AVMs are actually cured.

ماذا يحدث خلال علاجك

Each session takes 2 to 4 hours under general anaesthesia. You will not feel the catheter in the brain vessels. Afterwards you lie flat for several hours, spend a night in a monitored bed with tight blood pressure control, and may have a headache for a few days.

الإعداد لرحلتك

One session needs about 7 to 10 days in Istanbul including angiography and observation. Larger AVMs need 2 to 4 sessions spaced 3 to 8 weeks apart, often followed by surgery or radiosurgery, so plan the full sequence before you travel.

• Tell the doctor about medication, allergies, pregnancy or breastfeeding, and any history of cold sores, keloid scars or autoimmune disease
• Avoid alcohol, aspirin and anti-inflammatory painkillers for a few days beforehand if your own doctor agrees, to reduce bruising
• Arrive without make-up on the treatment area and avoid sunbeds and strong sun for two weeks before

التعافي والنتائج

Most people leave hospital after 1 to 3 days and return to light routine within a week. Avoid straining and heavy lifting for 2 weeks and keep blood pressure controlled. Scalp tenderness or hair thinning over the treated area can follow long X-ray exposure and usually recovers. A follow-up angiogram or MRI checks the result at 3 to 6 months.

• Back to everyday activity: About 1 week
• When results show: Flow reduction is immediate; cure is confirmed by angiography
• How long they last: Permanent only if the AVM is completely closed

سياسة السلامة والمخاطر والتنقيح

The procedure is low in discomfort but not low in risk; each session carries a few percent chance of a lasting neurological problem.

• Stroke from embolic material reaching a normal artery
• Bleeding from the AVM during or shortly after treatment, including from blocked venous outflow
• Microcatheter becoming stuck in the embolic cast
• Seizures or new headache
• Groin or wrist haematoma and contrast-related kidney strain
• Incomplete closure with later regrowth of the AVM

Every written proposal arranged through Clinic-Y states what the clinic covers if a correction is needed. Ask for it before you book, not after.

Cost of Brain AVM Embolization in Türkiye

Clinic-Y does not publish a single price for Brain AVM Embolization, because the honest figure depends on your case. What moves it:

• Number of sessions needed
• Volume and type of embolic agent and microcatheters used
• Intensive care monitoring nights
• Whether surgery or radiosurgery follows

Send your photographs or reports and you receive written, all-inclusive proposals from suitable teams, side by side. Reviewing your case is free.

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