Microembolic signals in subarachnoid hemorrhage

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia
Mahmoud Reza AzarpazhoohPayam Sasan Nejad

Abstract

Microembolic signals (MES) detected by transcranial Doppler (TCD) have been reported in subarachnoid hemorrhage (SAH), although their origin and contribution to brain ischemia remain uncertain. We conducted a prospective study to evaluate the frequency of MES among patients with SAH and to determine their origin. Twenty-seven patients with SAH, comprising 15 aneurysmal and 12 non-aneurysmal patients, participated in the study. TCD evaluation was performed using a 2 MHz probe. Patients were studied three times per week during their in-patient stay to detect vasospasm, and then each middle cerebral artery (MCA) was monitored for 30 min using the Monolateral Multigate mode to detect MES. Using this method, MES were detected in 7 out of 15 patients (47%) with aneurysmal SAH and were not seen in non-aneurysmal patients (p=0.007). Vasospasm occurred in 52% (14/27) of cases. However, clinical signs and symptoms of vasospasm were identified in only 18.5% (5/27). There was no significant relationship between MES and vasospasm (p=0.224). Also, no relationship was found between MES and the location of the aneurysm (p=0.685). Thus, in this study MES were only detected in aneurysmal SAH. However, we did not find a relationship between the l...Continue Reading

References

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Citations

May 21, 2010·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·Mahmoud Reza AzarpazhoohMorteza Modares Gharavi
Nov 22, 2011·Journal of Clinical Ultrasound : JCU·Hung-Chen WangCheng-Hsien Lu
Apr 22, 2015·BioMed Research International·Fernando Mendes PaschoalEdson Bor-Seng-Shu
Nov 13, 2018·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Stephanie GollwitzerHajo M Hamer
Aug 10, 2020·Neurocritical Care·Eva A RochaGisele S Silva
Feb 20, 2017·Neurosurgical Review·Jasper H van LieshoutMarcel A Kamp
Jun 16, 2018·Frontiers in Physiology·Spiros L BlackburnSylvain Doré
Apr 20, 2021·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Tamara M MuellerHajo M Hamer

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