Clinical application of asymptomatic embolic signal detection in acute stroke: A prospective study

Z. Káposzta, Elaine Young, Philip M W Bath, Hugh S. Markus

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Background and Purpose - The detection of asymptomatic embolization with the use of Doppler ultrasound has a number of potential applications in patients with acute stroke. It may provide information on the stroke pathogenesis in individual cases, identify patients with continued embolization, and allow localization of the active embolic source. Methods - We recruited 119 patients with acute anterior circulation infarction within 72 hours of stroke onset. Transcranial Doppler recordings were possible in 100 (84.0%). Bilateral 1-hour middle cerebral artery (MCA) recordings were made and saved on digital audiotape for blinded offline analysis. When embolic signals were detected during screening of the first recording, simultaneous recording was performed from the ipsilateral MCA and common carotid artery for an additional 30 minutes. In all patients with embolic signals at screening and in matched negative controls, recordings were repeated on days 4, 7, and 14. Results - Embolic signals were detected in the symptomatic MCA in 16 patients (16%). They were more common in patients with carotid stenosis (P

Original languageEnglish
Pages (from-to)1814-1818
Number of pages5
JournalStroke
Volume30
Issue number9
Publication statusPublished - Sep 1999

Fingerprint

Stroke
Prospective Studies
Middle Cerebral Artery
Tape Recording
Doppler Ultrasonography
Carotid Stenosis
Common Carotid Artery
Infarction

Keywords

  • Cerebral embolism
  • Stroke
  • Ultrasonography

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Neuroscience(all)

Cite this

Clinical application of asymptomatic embolic signal detection in acute stroke : A prospective study. / Káposzta, Z.; Young, Elaine; Bath, Philip M W; Markus, Hugh S.

In: Stroke, Vol. 30, No. 9, 09.1999, p. 1814-1818.

Research output: Contribution to journalArticle

Káposzta, Z. ; Young, Elaine ; Bath, Philip M W ; Markus, Hugh S. / Clinical application of asymptomatic embolic signal detection in acute stroke : A prospective study. In: Stroke. 1999 ; Vol. 30, No. 9. pp. 1814-1818.
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