I63.02 Cerebral infarction due to thrombosis of basilar artery

Name of the Condition

• Cerebral infarction due to thrombosis of basilar artery

Summary

This condition occurs when a blood clot (thrombosis) blocks the basilar artery, a major vessel supplying blood to the brainstem. The blockage disrupts blood flow, leading to brain tissue damage or death due to oxygen deprivation. The basilar artery is critical for brainstem function, so its occlusion can cause severe neurological deficits.

Causes

Atherosclerosis (plaque buildup in arteries) is a primary cause. Blood clotting disorders, heart disease, or artery injury can also lead to thrombosis. In some cases, emboli (clots from other areas) may travel to the basilar artery.

Risk Factors

• Advanced age
• High blood pressure
• High cholesterol
• Smoking
• Diabetes
• Obesity
• Sedentary lifestyle
• Family history of stroke or cardiovascular disease

Symptoms

• Sudden weakness or numbness in the face, arm, or leg, typically on one side
• Difficulty speaking or understanding speech
• Sudden vision problems in one or both eyes
• Loss of balance or coordination
• Sudden severe headache with no known cause
• Dizziness or vertigo
• Difficulty swallowing

Diagnosis

CT scan or MRI of the brain to identify affected areas. Doppler ultrasound or angiography to assess blood flow in the basilar artery. Blood tests to evaluate clotting tendency and stroke risk factors.

Treatment Options

• Antiplatelet or anticoagulant medications to prevent further clotting
• Thrombolytic therapy to dissolve clots (usually within hours of symptom onset)
• Surgical or endovascular procedures to remove or bypass blockages

Prognosis and Follow-Up

Prognosis depends on the extent of brain damage and timely treatment. Recovery may involve physical, occupational, or speech therapy. Regular follow-up with a neurologist is essential to monitor for recurrence and manage risk factors.

Complications

• Permanent neurological deficits (e.g., paralysis, speech impairment)
• Increased risk of future strokes
• Swallowing difficulties leading to aspiration
• Cognitive or memory problems

Lifestyle & Prevention

• Manage blood pressure, cholesterol, and diabetes
• Quit smoking and limit alcohol intake
• Maintain a healthy weight and exercise regularly
• Follow a balanced diet low in saturated fats
• Take prescribed medications as directed

When to Seek Professional Help

Seek immediate medical attention if you experience sudden weakness, numbness, speech difficulty, vision changes, or severe headache. These symptoms may indicate a stroke and require urgent care.

Tips for Medical Coders

Document the specific artery involved (basilar artery) and confirm thrombosis as the cause. Ensure clinical documentation supports the diagnosis to justify code assignment. Note any associated symptoms or complications for accurate coding.