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Updated: May 2, 2026

Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
Published on: January 18, 2018
[Subtypes of acute ischemic stroke and neurological prognosis]
Yoshikazu Erabi1, Yukiko Kouhisa1, Shunsuke Murakami2
1Depertment of Anesthesiology, Chugoku Rosai Hospital, Hiroshima 737-0134.
Insights
Stroke subtypes classified by TOAST diagnosis do not impact prognosis after intravenous recombinant tissue plasminogen activator (rt-PA) treatment. However, internal carotid artery occlusion is linked to poorer outcomes in acute ischemic stroke patients.
Area of Science:
- Neurology
- Vascular Neurology
- Stroke Medicine
Context:
- Acute ischemic stroke management relies on timely intervention.
- Intravenous recombinant tissue plasminogen activator (rt-PA) is a critical treatment.
- Understanding factors influencing prognosis is essential for patient care.
Purpose:
- To investigate the prognostic impact of stroke subtypes (cardioembolic vs. atherothrombotic) after rt-PA therapy.
- To determine if internal carotid artery occlusion affects outcomes in acute ischemic stroke patients treated with rt-PA.
Summary:
- This study analyzed 37 acute ischemic stroke patients receiving rt-PA within 3 hours.
- Stroke subtypes (cardioembolic and atherothrombotic) did not significantly differ in 24-hour NIHSS, discharge NIHSS, or 3-month mRS.
- Internal carotid artery occlusion was associated with a lower modified Rankin Scale (mRS) score at 3 months.
Impact:
- Stroke subtype classification by TOAST diagnosis does not predict prognosis following rt-PA treatment.
- Internal carotid artery occlusion is identified as a significant factor associated with unfavorable outcomes.
- Findings aid in refining prognostic assessments for acute ischemic stroke patients.
Background:
TOAST diagnosis is used in acute ischemic stroke. There is no evidence about the relationship between stroke subtypes classified by TOAST diagnosis and prognosis. We investigated prognosis of cardioembolic stroke (CE) and atherothrombotic stroke (AT) after intravenous recombinant tissue plasminogen activator (rt-PA), to clarify relationship between stroke subtypes and prognosis. Additionally we investigated acute ischemic stroke with internal carotid artery occlusion as a factor to influence the prognosis.
Methods:
We analyzed 37 patients (22 cardioembolic stroke cases and 15 atherothrombotic stroke cases) with acute ischemic stroke who received intravenous rt-PA within 3 hours after onset. We performed neurologic evaluation using the National Institutes of Health Stroke Scale (NIHSS) on admission, after 24 hours, and at discharge. We evaluated the efficacy of rt-PA on the basis of NIHSS score at 24 hours. We also assessed the prognosis by measuring modified Rankin Scale (mRS) at 3 months. We performed classification by presence or absence of internal carotid artery occlusion in 37 cases, examining the prognosis using mRS at 3 months.
Results:
There was a significant difference in NIHSS on admission between CE and AT, but significant difference was not found in NIHSS at 24 hours, and at discharge. There was also no significant difference in the proportion of effectiveness after rt-PA therapy and mRS at 3 months. The cases with internal carotid artery occlusion were associated with lower mRS score as compared with the cases without occlusion.
Conclusions:
Stroke subtypes classified by TOAST diagnosis have no relationship with the prognosis. However, internal carotid artery occlusion is a factor associated with unfavorable outcome.
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