Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 11/16/2025

Emergency Management of Acute Stroke

Immediate Priorities in the Emergency Department

  • The American Heart Association recommends performing non-contrast CT scan or brain MRI immediately upon arrival before any specific stroke treatment to differentiate ischemic stroke from hemorrhagic stroke 1
  • The American College of Cardiology suggests that blood pressure must be lowered to <185/110 mmHg before initiating IV alteplase if thrombolysis is being considered 1, 2
  • The American Stroke Association recommends maintaining BP <180/105 mmHg for at least 24 hours after thrombolysis 2, 4
  • The American Heart Association recommends using labetalol as first-line agent for blood pressure control in acute stroke 2, 4
  • The American College of Cardiology suggests that if the patient is not receiving thrombolysis, blood pressure should not be treated unless it exceeds 220/120 mmHg 2, 5, 4

Hyperglycemia Management

  • The American Diabetes Association recommends initiating treatment for blood glucose >200 mg/dL and targeting a glucose range of 140-180 mg/dL 6, 7
  • The American Heart Association suggests using intravenous insulin infusion with frequent monitoring and dose adjustments for hyperglycemia management 6, 7

Additional Emergency Interventions

  • The American Thoracic Society recommends providing supplemental oxygen to maintain oxygen saturation ≥94% 1, 3
  • The American College of Cardiology suggests that tracheal intubation is indicated only if airway is compromised or ventilation is insufficient due to impaired alertness 1

Thrombolysis Decision-Making

  • The American Heart Association recommends initiating IV alteplase (0.9 mg/kg, maximum 90 mg over 60 minutes with 10% as initial bolus) as soon as possible if imaging confirms ischemic stroke and patient presents within 4.5 hours of symptom onset 1

Critical Pitfalls to Avoid

  • The American College of Cardiology warns against aggressively lowering BP in the first 48-72 hours when not giving thrombolysis, as it can extend infarct size by reducing perfusion to the penumbra 5, 4
  • The American Heart Association advises against using agents that cause precipitous BP drops, such as sublingual nifedipine or sodium nitroprusside, as rapid reduction compromises cerebral perfusion 5

Monitoring Protocol

  • The American College of Cardiology recommends monitoring BP every 15 minutes during thrombolysis treatment and for 2 hours after, then every 30 minutes for the next 6 hours, and every hour for the next 16 hours 2, 5

REFERENCES

2

Blood Pressure Management in Acute Cerebrovascular Diseases [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

3

Blood Pressure Management in Acute Ischemic Stroke [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

4

Management of Blood Pressure in Brain Stem Stroke [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025