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CardiovascularICD-10: I63Nearly 800,000 people in the US have a stroke each year; it is a leading cause of death and disability

Stroke

Also known as: Cerebrovascular accident, CVA, Brain attack

A stroke occurs when blood flow to a part of the brain is interrupted or severely reduced, depriving brain tissue of oxygen and nutrients. There are two main types: ischemic stroke caused by a blocked artery, and hemorrhagic stroke caused by a ruptured blood vessel. Stroke is a medical emergency where every minute of delay in treatment increases the risk of permanent brain damage or death.

Symptoms

Sudden numbness or weakness on one side of the face, arm, or leg
Sudden confusion or trouble speaking or understanding speech
Sudden trouble seeing in one or both eyes
Sudden severe headache with no known cause
Sudden difficulty walking, dizziness, or loss of balance
Drooping of one side of the face

Causes

  • Blood clot blocking an artery to the brain (ischemic stroke)
  • Rupture of a blood vessel in the brain (hemorrhagic stroke)
  • Atrial fibrillation causing blood clots that travel to the brain
  • Atherosclerosis narrowing the brain's blood vessels

Risk Factors

  • High blood pressure
  • Heart disease and atrial fibrillation
  • Diabetes
  • Smoking
  • High cholesterol
  • Obesity and physical inactivity

Diagnosis

  • CT scan of the brain to distinguish ischemic from hemorrhagic stroke
  • MRI for detailed brain imaging
  • CT angiography to identify blocked blood vessels
  • Blood tests to assess clotting and blood sugar
  • Echocardiogram to evaluate the heart as a source of clots

Treatment

  • IV thrombolytics (tPA) within 4.5 hours for ischemic stroke
  • Mechanical thrombectomy to remove clots in large vessel occlusions
  • Blood pressure management for hemorrhagic stroke
  • Surgical intervention for severe hemorrhagic stroke
  • Rehabilitation including physical, occupational, and speech therapy
  • Long-term medications to prevent recurrence

Prevention

  • Controlling high blood pressure with medication and lifestyle changes
  • Managing diabetes and cholesterol levels
  • Quitting smoking
  • Regular physical exercise
  • Anticoagulation therapy for atrial fibrillation

When to See a Doctor

  • Any sudden onset of FAST symptoms: Face drooping, Arm weakness, Speech difficulty, Time to call emergency services
  • Sudden severe headache unlike any experienced before
  • Sudden vision changes or trouble walking
  • Any symptoms even if they resolve, as this may indicate a TIA

Frequently Asked Questions

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