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Updated: Apr 22, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
Cryptogenic stroke: A diagnostic challenge
Shadi Yaghi1, Mitchell S V Elkind1
1Department of Neurology, College of Physicians and Surgeons (SY, MSVE), and Department of Epidemiology, Mailman School of Public Health (MSVE), Columbia University, New York, NY.
Insights
Cryptogenic stroke, or unexplained stroke, affects 30-40% of ischemic stroke patients. Identifying the stroke mechanism through advanced imaging and cardiac tests is crucial for effective treatment and reducing recurrence risk.
Area of Science:
- Neurology
- Cardiology
- Diagnostic Imaging
Background:
- Cryptogenic stroke accounts for 30-40% of ischemic stroke cases.
- Determining the underlying cause is vital for guiding treatment and preventing recurrent strokes.
Purpose of the Study:
- To evaluate the diagnostic yield of various tests in identifying stroke mechanisms.
- To explore treatment implications based on identified stroke causes in cryptogenic stroke patients.
Main Methods:
- Review of diagnostic yield for intracranial vessel imaging.
- Assessment of cardiac evaluation methods including transesophageal echocardiogram and outpatient cardiac monitoring.
Main Results:
- Intracranial vessel imaging and cardiac evaluations are key in uncovering stroke mechanisms.
- The diagnostic yield of these tests informs therapeutic strategies.
Conclusions:
- Further investigation beyond initial evaluations is essential for cryptogenic stroke patients.
- Tailored treatment based on identified mechanisms improves outcomes and reduces stroke recurrence.
Abstract:
Cryptogenic, or unexplained, stroke is present in about 30%-40% of ischemic stroke patients. Pursuing a stroke mechanism is important in such patients to better choose therapy to reduce the stroke recurrence risk. Intracranial vessel imaging and cardiac evaluation with transesophageal echocardiogram and outpatient cardiac monitoring may help identify the stroke mechanism. This article highlights the diagnostic yield of various tests in identifying a stroke mechanism in stroke patients whose initial diagnostic evaluation is negative, and the implications for treatment.
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