Neurovascular Disease in Kathmandu — Understanding Brain Blood Vessel Conditions

Neurovascular disease encompasses conditions affecting blood vessels in the brain and spinal cord. These include aneurysms, arteriovenous malformations (AVMs), cavernous malformations, moyamoya disease, and vasculitis. Many neurovascular conditions are silent until they cause serious complications, making awareness and timely evaluation important.

Brain aneurysms are bulging weak spots in artery walls, most commonly at branch points in the circle of Willis. Small aneurysms may never rupture, but larger aneurysms carry significant risk. Rupture causes subarachnoid hemorrhage — a life-threatening emergency presenting with thunderclap headache. Screening may be considered when there is a family history of aneurysms, certain genetic conditions, or when an aneurysm is found incidentally on imaging.

Dr. Jitendra Prasad Yadav — consultant neurologist & headache specialist at Kathmandu Neurology Clinic & Cognitive Center provides evidence-based evaluation for stroke & tia.

Arteriovenous malformations are abnormal tangles of blood vessels connecting arteries directly to veins without intervening capillaries. This abnormal connection can rupture, causing intracranial hemorrhage, or cause seizures or neurological deficits through steal phenomenon (blood diverted from normal brain tissue). AVMs are often congenital and may be discovered incidentally or after hemorrhage.

Cavernous malformations are clusters of abnormal, dilated blood vessels that can bleed repeatedly within the brain parenchyma. They may cause seizures, progressive neurological deficits, or headaches. Familial cavernous malformations are associated with genetic mutations.

Moyamoya disease is a progressive cerebrovascular disorder where internal carotid arteries narrow, leading to compensatory formation of fragile collateral vessels that resemble a puff of smoke (moyamoya in Japanese). It can cause ischemic stroke, hemorrhagic stroke, or transient ischemic attacks, particularly in children and young adults.

Vasculitis involves inflammation of blood vessels in the brain and can be primary (central nervous system vasculitis) or secondary to systemic autoimmune conditions like lupus or Beh—et's disease. It typically causes headache, cognitive changes, and focal neurological deficits.

Evaluation of neurovascular conditions involves detailed vascular imaging. MRI brain with magnetic resonance angiography (MRA) and venography (MRV) provides comprehensive assessment. CT angiography (CTA) offers high-resolution vascular detail. Digital subtraction angiography (DSA) remains the gold standard for definitive characterization, particularly when endovascular treatment is being considered.

Treatment depends on the specific condition. Aneurysms may be managed with surgical clipping or endovascular coiling. AVMs may be treated with surgical resection, stereotactic radiosurgery, or endovascular embolization. Moyamoya disease may require direct or indirect revascularization surgery. Vasculitis is typically treated with immunosuppressive medications.

At Kathmandu Neurology Clinic & Cognitive Center, Dr. Jitendra Prasad Yadav (NMC 8029) evaluates suspected neurovascular conditions and coordinates with neuroradiology and neurosurgery when intervention is needed. For acute neurological symptoms suggesting hemorrhage or stroke, emergency evaluation is required immediately.

This article is educational and does not replace individual medical advice.

**Frequently Asked Questions**

Q: What are the symptoms of a brain aneurysm? A: Most brain aneurysms cause no symptoms until they rupture. Rupture causes sudden severe headache (thunderclap headache), neck stiffness, nausea, vomiting, sensitivity to light, and altered consciousness. Unruptured aneurysms occasionally cause pain above or behind the eye, vision changes, or nerve palsy.

Q: How are neurovascular conditions diagnosed? A: Diagnosis involves vascular imaging including MRI with MRA/MRV, CT angiography, and sometimes digital subtraction angiography (DSA). The choice of imaging depends on the suspected condition and clinical urgency.

Q: Can neurovascular diseases be prevented? A: Not all neurovascular conditions are preventable, as many are congenital or have genetic components. However, controlling vascular risk factors (blood pressure, diabetes, cholesterol, smoking) reduces the risk of complications and may slow progression of some conditions.

Q: What is the treatment for brain aneurysms? A: Treatment options include surgical clipping (placing a clip across the aneurysm neck) and endovascular coiling (placing coils inside the aneurysm through a catheter). Small, unruptured aneurysms may be monitored with serial imaging rather than treated immediately.

Q: What is moyamoya disease? A: Moyamoya disease is a progressive cerebrovascular disorder where the internal carotid arteries at the base of the brain narrow, causing the formation of fragile collateral blood vessels. It can cause strokes and TIAs, particularly in children and young adults, and may require revascularization surgery.

Q: When should neurovascular disease be evaluated urgently? A: Urgent evaluation is needed for sudden severe headache (thunderclap), new neurological deficit (weakness, numbness, speech difficulty), seizure, altered consciousness, or sudden vision loss. These symptoms may indicate hemorrhage or acute ischemia requiring emergency care.