Detection of microembolic signals using power M-mode Doppler sonography in acute stroke patients with intracranial artery stenosis
✍ Scribed by Teng-Yeow Tan; Ting-Yao Chen
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 98 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0091-2751
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✦ Synopsis
Abstract
Purpose.
Microembolic signals (MES) can be detected in a variety of clinical situations using conventional transcranial Doppler (TCD) sonography. We studied the prevalence of positive MESs in acute stroke patients with intracranial artery stenosis using power M‐mode Doppler (PMD) sonography and also tested the feasibility of this new technique.
Method.
Thirty‐three consecutive acute ischemic stroke or transient ischemic attack patients with intracranial large artery occlusive disease were enrolled. PMD/TCD monitoring for 30 minutes was used for MES detection downstream of the stenotic artery within 1 week after stroke onset. Clinical risk factors in emboli‐positive and emboli‐negative patients were assessed.
Results.
MESs were detected in 21% (7/33) of patients. No significant differences were found in clinical risk factors between emboli‐positive and emboli‐negative patients.
Conclusion.
PMD sonography to detect MESs in acute stroke patients is feasible and may be used in future clinical trials regarding MES detection. © 2008 Wiley Periodicals, Inc. J Clin Ultrasound, 2008