Arteriovenous Malformations (AVMs)

Overview

Arteriovenous Malformations (AVMs) are abnormal tangles of blood vessels in which arteries connect directly to veins without the normal network of tiny capillaries in between. This abnormal connection disrupts normal blood flow and may increase the risk of bleeding, seizures, headaches, or neurological problems.

AVMs can occur in different parts of the body, but they are most serious when they develop in the brain or spinal cord. In some patients, an AVM may remain silent for years and be discovered only after symptoms appear or after bleeding occurs.

At Moolchand Hospital, patients with AVMs receive comprehensive evaluation and advanced care from specialists in neurology, neurosurgery, and critical care. As a trusted multi super speciality hospital in Delhi and a leading hospital in Lajpat Nagar Delhi, Moolchand offers advanced neuroimaging, surgical planning, and specialized management for vascular abnormalities of the brain and spine.

What are Arteriovenous Malformations (AVMs)?

An arteriovenous malformation is an abnormal cluster of blood vessels where blood flows directly from arteries to veins. Normally, capillaries help slow blood flow and allow oxygen exchange between blood and tissues. In an AVM, this normal pathway is bypassed.

Because of this, the blood vessels in an AVM may be exposed to higher pressure than normal, which can increase the risk of rupture or bleeding. When AVMs occur in the brain, they may lead to serious neurological complications.

AVMs are often congenital, which means they are usually present from birth, although symptoms may not appear until later in life.

Symptoms of AVMs

Symptoms depend on the location and size of the AVM. Some patients may have no symptoms at all until the AVM bleeds.

Common symptoms may include:

• Severe or recurring headaches
  
  

• Seizures
  
  

• Weakness or numbness in part of the body
  
  

• Difficulty speaking
  
  

• Vision problems
  
  

• Loss of balance or coordination
  
  

• Sudden neurological symptoms due to bleeding
  
  

• Back pain or leg weakness in spinal AVMs
  
  

A ruptured AVM in the brain can cause a brain bleed or hemorrhagic stroke, which is a medical emergency.

Causes of AVMs

The exact cause of most AVMs is not fully understood, but they are generally believed to develop during fetal growth before birth.

In most cases:

• AVMs are congenital
  
  

• They are not caused by lifestyle factors
  
  

• They may remain unnoticed for many years
  
  

• Rarely, abnormal blood vessel formation may involve genetic factors
  
  

Most AVMs are not inherited, although certain rare syndromes may increase vascular malformations.

Risk Factors

AVMs can occur in people of any age, but symptoms are often diagnosed in younger adults.

Possible risk-related factors include:

• Congenital vascular abnormality
  
  

• Family history in rare cases
  
  

• Certain inherited vascular syndromes
  
  

• Prior unexplained seizures or brain bleeding
  
  

Because many AVMs are present from birth, prevention is not usually possible. Early diagnosis is important when symptoms occur.

Diagnosis

Doctors diagnose AVMs using neurological assessment and advanced imaging tests.

Investigations may include:

• CT scan
  
  

• MRI scan
  
  

• CT angiography
  
  

• MR angiography
  
  

• Cerebral angiography for detailed blood vessel mapping
  
  

At Moolchand Hospital Delhi, advanced neuroimaging helps identify the location, size, and blood flow pattern of the AVM so doctors can plan the safest treatment.

Treatment

Treatment depends on the location, size, symptoms, and bleeding risk of the AVM.

Observation and Monitoring

Small AVMs without symptoms may sometimes be monitored with regular imaging and neurological follow-up.

Medications

Medicines may be used to manage symptoms such as headaches or seizures, but they do not remove the AVM itself.

Endovascular Embolization

A minimally invasive procedure in which doctors block abnormal blood vessels to reduce blood flow through the AVM.

Microsurgical Removal

Surgery may be recommended to remove the AVM completely, especially if it has bled or carries a significant future bleeding risk.

Stereotactic Radiosurgery

Focused radiation may be used in selected AVMs to gradually close abnormal vessels over time.

At Moolchand Hospital Lajpat Nagar, treatment planning is individualized, with input from neurologists, neurosurgeons, and critical care teams to achieve the safest possible outcome.

Possible Complications

If left untreated, AVMs may lead to:

• Brain hemorrhage
  
  

• Hemorrhagic stroke
  
  

• Seizures
  
  

• Chronic headaches
  
  

• Progressive neurological deficits
  
  

• Spinal cord damage in spinal AVMs
  
  

Early diagnosis and specialist care help reduce the risk of serious complications.

Prevention

Because AVMs are usually present from birth, they cannot typically be prevented. However, complications may be reduced through:

• Early medical evaluation of unexplained neurological symptoms
  
  

• Timely brain imaging when seizures or sudden headaches occur
  
  

• Regular follow-up if an AVM is diagnosed
  
  

• Prompt treatment planning based on bleeding risk
  
  

Why Choose Moolchand Hospital?

Patients choose Moolchand Hospital Lajpat Nagar for AVM treatment because of:

• Experienced neurologists and neurosurgeons
  
  

• Advanced CT, MRI, and angiography facilities
  
  

• Comprehensive stroke and neurocritical care support
  
  

• Multidisciplinary evaluation and treatment planning
  
  

• Modern operation theatres and intensive care units
  
  

• Trusted care at a leading private hospital in Delhi
  
  

The hospital provides coordinated care for complex neurological and vascular conditions with a focus on precision, safety, and recovery.