Journal of clinical ultrasound : JCU · 2008
Detection of microembolic signals using power M-mode Doppler sonography in acute stroke patients with intracranial artery stenosis.
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Tan Teng-Yeow, Chen Ting-Yao
Аннотация
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.
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.