ModulePublishedclinician-educationstroke-escalationimaging

Ischemic vs hemorrhagic detection workflow — why CT comes first and when MRI/CTA/MRA follow (Advanced)

Advanced course: end-to-end imaging logic in acute stroke: non-contrast CT for bleed, CTA for vessels, MRI DWI for early ischemia, and why location (posterior fossa) changes strategy.

ClinicianCaregiver, SurvivorAdvanced24 minGrade 11

Educational only

Educational only — not medical advice.

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If a patient develops new or worsening stroke symptoms, reduced consciousness, seizure, severe headache, airway/swallowing danger, or unstable vital signs, activate emergency response and follow local stroke escalation protocols.

Key takeaways

  • Explain why non-contrast CT is first-line in suspected stroke
  • Know what CTA adds (vessel occlusion/stenosis)
  • Explain why MRI DWI detects early ischemia and when it’s used
  • Explain why location (posterior vs anterior circulation) changes sensitivity and repeat imaging decisions

Why this matters

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Clinical frame

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Core clinical idea

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Assessment and workup

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Clinical reasoning pathway

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Management and team actions

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Common pitfalls

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Patient-safe explanation

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Escalation and safety signals

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Applied case

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Clinical scenario

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Common misconceptions

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Reflect

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Key takeaways

  • Understand why non-contrast CT is first-line in suspected stroke
  • Advanced stroke care requires reconciling the clinical syndrome with timing, imaging, medication risk, patient context, and local pathway capacity.
  • A safe plan names escalation thresholds, responsible clinicians, patient-facing instructions, and the next step if results or symptoms change.

Practice check

What you’ll practice

These questions are untimed. After you answer all of them, you’ll see your score and a clear next lesson or reference step.

0 of 4 answered

Question 1

1. A learner is applying this lesson on Ischemic vs hemorrhagic detection workflow — why CT comes first and when MRI/CTA/MRA follow. Which approach best reflects advanced clinical reasoning?

Question 2

2. Which actions show safe handling of Ischemic vs hemorrhagic detection workflow — why CT comes first and when MRI/CTA/MRA follow? Select all that apply.

Question 3

3. Match each reasoning element to its role in Ischemic vs hemorrhagic detection workflow — why CT comes first and when MRI/CTA/MRA follow.

Question 4

4. For Ischemic vs hemorrhagic detection workflow — why CT comes first and when MRI/CTA/MRA follow, a normal or non-specific early test result is enough to stop reassessment when the clinical syndrome still suggests risk.

References

  1. Tier 2RadiologyInfo.org2025
    CT Angiography of the Head
  2. Tier 2RadiologyInfo.org2025
    Magnetic Resonance Imaging (MRI) - Head