How is secondary prevention managed after an ischemic stroke?

Secondary prevention typically includes antiplatelet therapy (e.g., aspirin), high-intensity statins, tight blood pressure control, and lifestyle modifications.

What role does dual antiplatelet therapy (DAPT) play in stroke management?

DAPT (Aspirin + Clopidogrel) is recommended for 21-90 days following a minor stroke (NIHSS ≤ 3) or high-risk TIA to prevent early recurrent stroke, followed by monotherapy.

When should anticoagulants be started after a stroke with atrial fibrillation?

Anticoagulation timing follows the '1-3-6-12 rule' based on infarct severity (TIA: 1 day, minor stroke: 3 days, moderate: 6 days, severe: 12-14 days) to balance stroke prevention and bleeding risks.

NeurologyClass I, Level A Evidence (AHA/ASA Stroke Guidelines)5 min read

Acute Ischemic Stroke Clinical Management: Evidence-Based Master Guide

Master acute stroke initial assessment, ASPECTS scoring grid, blood pressure target badges, and Stroke Code triage flowcharts.

Bedside Rounds Medical Editorial Board

Neurology & Neurocritical Care Faculty

Published 2026-07-28

Table of Contents (10 Sections)

High-Res View

Acute Ischemic Stroke Clinical Management: Evidence-Based Master Guide

Clinical Takeaway

⚡ EXECUTIVE CLINICAL SUMMARY - Stroke Code Emergency Rule: Door-to-CT target is ≤ 25 minutes. Door-to-Needle thrombolysis target is ≤ 45 minutes. - Blood Pressure Control: SBP must be < 185/110 mmHg prior to IV Thrombolysis. Maintain SBP < 180/105 mmHg for 24 hours post-thrombolysis. - ASPECTS Score Benchmark: ASPECTS ≥ 6 indicates favorable penumbral salvage for mechanical thrombectomy (EVT). - Post-Stroke Antithrombotic Rule: Delay aspirin and antiplatelet therapy for 24 hours post-thrombolysis until 24-hour follow-up NCCT rules out hemorrhage.

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📌 Interactive Table of Contents (Index)

1. Introduction & Hyperacute Workflow
2. Stroke Code Triage Algorithm
3. Non-Contrast CT & ASPECTS Scoring Grid
4. Blood Pressure Targets & Management Badges
5. Reperfusion Therapy: Thrombolysis vs EVT Table
6. Advanced Neurovascular Metrics
7. Flagship Worked Clinical Case Study
8. High-Yield Clinical Pearls & Diagnostic Traps

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1. Introduction & Hyperacute Workflow

Acute ischemic stroke management demands systematic rapid triage to minimize ischemic cell death (1.9 million neurons lost per minute).

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2. Stroke Code Triage Algorithm

Follow this immediate resuscitation and imaging pathway:

Step 1: Rapid Triage (BE-FAST)
- Assess Balance, Eyes, Face, Arm weakness, Speech difficulty, and Time of onset (Last Known Well).
Step 2: Fingerstick Blood Glucose
- Stat capillary glucose to exclude hypoglycemia (<60 mg/dL).
Step 3: Stat Non-Contrast CT (NCCT)
- Complete NCCT head within 25 minutes to exclude intracranial hemorrhage.

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3. Non-Contrast CT & ASPECTS Scoring Grid

The Alberta Stroke Program Early CT Score (ASPECTS) divides the MCA territory into 10 anatomical regions:

ASPECTS Region	Anatomical Location	Ischemic Sign
Subcortical (4)	Caudate, Lentiform, Internal Capsule, Insular Ribbon	Hypodensity / Loss of Gray-White Distinction
Cortical (6)	M1 (Anterior), M2 (Lateral), M3 (Posterior), M4, M5, M6	Sulcal Effacement / Cortical Hypodensity
Scoring Rule	Start at 10 points; subtract 1 point for each affected region	Score ≥6 = Favorable	Score <6 = Large Core

ASPECTS Region:Subcortical (4)

Anatomical Location:Caudate, Lentiform, Internal Capsule, Insular Ribbon

Ischemic Sign:Hypodensity / Loss of Gray-White Distinction

ASPECTS Region:Cortical (6)

Anatomical Location:M1 (Anterior), M2 (Lateral), M3 (Posterior), M4, M5, M6

Ischemic Sign:Sulcal Effacement / Cortical Hypodensity

ASPECTS Region:Scoring Rule

Anatomical Location:Start at 10 points; subtract 1 point for each affected region

Ischemic Sign:Score ≥6 = Favorable

Col 4:Score <6 = Large Core

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4. Blood Pressure Targets & Management Badges

Strict blood pressure protocols prevent hemorrhagic transformation post-thrombolysis:

Clinical Scenario	SBP / DBP Target	Preferred Pharmacotherapy
Pre-IV Thrombolysis Candidate	< 185 / 110 mmHg	IV Labetalol 10–20 mg IV push OR IV Nicardipine 5 mg/hr
Post-IV Thrombolysis (24 Hours)	< 180 / 105 mmHg	Monitor q15min × 2h, q30min × 6h, q1h × 16h
Non-Thrombolysis Candidate	Permissive Hypertension < 220 / 120 mmHg	Do not lower unless organ damage or SBP >220

Clinical Scenario:Pre-IV Thrombolysis Candidate

SBP / DBP Target:< 185 / 110 mmHg

Preferred Pharmacotherapy:IV Labetalol 10–20 mg IV push OR IV Nicardipine 5 mg/hr

Clinical Scenario:Post-IV Thrombolysis (24 Hours)

SBP / DBP Target:< 180 / 105 mmHg

Preferred Pharmacotherapy:Monitor q15min × 2h, q30min × 6h, q1h × 16h

Clinical Scenario:Non-Thrombolysis Candidate

SBP / DBP Target:Permissive Hypertension < 220 / 120 mmHg

Preferred Pharmacotherapy:Do not lower unless organ damage or SBP >220

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5. Reperfusion Therapy: Thrombolysis vs EVT Table

Therapy Modality	Time Window	Key Inclusion Criteria	Primary Exclusions
IV Tenecteplase (TNK)	< 4.5 Hours of LKW	Dose 0.25 mg/kg IV bolus (max 25 mg)	Active hemorrhage, SBP >185/110, INR >1.7
Mechanical Thrombectomy	< 24 Hours of LKW	LVO (ICA, M1 MCA) + Penumbral Mismatch	Large established core (ASPECTS < 3)

Therapy Modality:IV Tenecteplase (TNK)

Time Window:< 4.5 Hours of LKW

Key Inclusion Criteria:Dose 0.25 mg/kg IV bolus (max 25 mg)

Primary Exclusions:Active hemorrhage, SBP >185/110, INR >1.7

Therapy Modality:Mechanical Thrombectomy

Time Window:< 24 Hours of LKW

Key Inclusion Criteria:LVO (ICA, M1 MCA) + Penumbral Mismatch

Primary Exclusions:Large established core (ASPECTS < 3)

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6. Advanced Neurovascular Metrics

▶ Collateral Circulation Score on CTA

Grade 0: Absence of collateral supply to ischemic territory.
Grade 1: Minimal collaterals (< 50% territory reconstituted).
Grade 2: Moderate collaterals (50%–99% territory reconstituted).
Grade 3: Complete collaterals (100% territory reconstituted; favorable EVT candidate!).

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7. Flagship Worked Clinical Case Study

Worked Case: Hyperacute Stroke with Borderline Blood Pressure

Case Study

A 66-year-old female presents 80 minutes after sudden right-sided weakness and aphasia (NIHSS 14). BP on arrival is 196/114 mmHg.

#### 📊 Patient Lab & Neuro Panel

Diagnostic Parameter	Measured Value	Reference Range	Diagnostic Interpretation
Blood Pressure	196 / 114 mmHg	120/80 mmHg	Exceeds 185/110 cutoff for IV TNK
NIHSS Score	14 / 42	0	Moderate-to-Severe Deficit
NCCT Head	No Hemorrhage (ASPECTS 9)	Normal	Intracranial Hemorrhage Ruled Out
Blood Glucose	124 mg/dL	70–140 mg/dL	Hypoglycemia Excluded

Diagnostic Parameter:Blood Pressure

Measured Value:196 / 114 mmHg

Reference Range:120/80 mmHg

Diagnostic Interpretation:Exceeds 185/110 cutoff for IV TNK

Diagnostic Parameter:NIHSS Score

Measured Value:14 / 42

Reference Range:0

Diagnostic Interpretation:Moderate-to-Severe Deficit

Diagnostic Parameter:NCCT Head

Measured Value:No Hemorrhage (ASPECTS 9)

Reference Range:Normal

Diagnostic Interpretation:Intracranial Hemorrhage Ruled Out

Diagnostic Parameter:Blood Glucose

Measured Value:124 mg/dL

Reference Range:70–140 mg/dL

Diagnostic Interpretation:Hypoglycemia Excluded

#### ⚡ Step-by-Step Clinical Decision Flowchart

Step 1: Acute BP Control → Administer IV Labetalol 20 mg IV push (BP drops to 174/96 mmHg within 10 min)
Step 2: IV Thrombolysis  → Administer IV Tenecteplase (TNK) 0.25 mg/kg bolus at 95 minutes post-LKW
Step 3: CTA Head/Neck    → Identifies M1 MCA occlusion → Stat transfer to Endovascular Suite
Step 4: Thrombectomy     → Successful TICI 2b/3 stent retriever thrombectomy completed
Step 5: Post-tPA Care    → Maintain SBP < 180/105 mmHg on Nicardipine infusion; stat 24h NCCT scheduled

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8. High-Yield Clinical Pearls & Diagnostic Traps

Clinical Takeaway

💡 Attending Pearls for Ward Rounds: - Do Not Delay TNK for Blood Pressure: If SBP is >185 mmHg, lower it IMMEDIATELY with IV Labetalol or Clevidipine so IV TNK can be administered within the 4.5-hour window. - Hold Antiplatelets 24 Hours: Never start aspirin or clopidogrel within 24 hours of IV thrombolysis to prevent severe intracerebral hemorrhage. - Watch for Oromandibular Angioedema: Alteplase/TNK can cause acute tongue/lip swelling in patients taking ACE inhibitors—stop infusion and give IV Diphenhydramine + Methylprednisolone!

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Interactive Simulation Available

Test Your Decision-Making in Hyperacute MCA Stroke with Large Vessel Occlusion

Experience this exact clinical scenario in the Bedside Rounds interactive simulator. Order investigations, manage door-to-needle timing, and witness real-time physiological feedback.

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