Stroke (Ischaemic)

Neurology

Sudden focal neurological deficit from interrupted cerebral perfusion lasting >24 h or with infarction on imaging.

Causes

  • • Large-vessel atherosclerosis
  • • Cardioembolic (AF)
  • • Small-vessel (lacunar)
  • • Dissection, vasculitis

Clinical features

  • • FAST: Face, Arm, Speech, Time
  • • Hemiparesis, dysphasia, neglect
  • • Visual field deficit

Investigations

  • • Urgent non-contrast CT head (exclude haemorrhage)
  • • CTA for LVO
  • • Glucose, ECG, bloods, lipids
  • • MRI for posterior circulation if CT negative

Management

  • • Thrombolysis with alteplase ≤4.5 h
  • • Mechanical thrombectomy ≤6 h (selected ≤24 h)
  • • Aspirin 300 mg after bleed excluded; switch to clopidogrel at 2 weeks
  • • Statin, BP control (delayed), DVT prophylaxis (IPC initially)
  • • Stroke unit, SALT swallow, MDT rehab

Complications

  • • Haemorrhagic transformation
  • • Cerebral oedema
  • • Aspiration pneumonia
  • • DVT/PE

Prevention

  • • Manage AF (DOAC), BP, lipids, DM
  • • Smoking cessation

Clinical pearls

  • • ROSIER score for ED stroke recognition
  • • Don't lower BP <220/120 in first 24 h unless thrombolysis

References

  • • NICE NG128
  • • AHA/ASA 2019

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