Journal article

Microembolic signals in subarachnoid hemorrhage

Mahmoud Reza Azarpazhooh, Arash Velayati, Brian R Chambers, Hossain Mashhadi Nejad, Payam Sasan Nejad



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 ..

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University of Melbourne Researchers


Awarded by Vice-Chancellor for Research at Mashhad University of Medical Sciences

Funding Acknowledgements

The authors thank the neurology and neurosurgery intensive care units of Ghaem Hospital for their support of this study. Dr M.T. Shakeri assisted with data analysis, Mrs Khaniani supported patients during TCD monitoring, Miss Tamara Tamamgar and Miss Sara Velayati helped gather patient data, and Mr M.A. Rasaee provided editorial assistance. This study was funded by a grant from the Vice-Chancellor for Research at Mashhad University of Medical Sciences (#439). The project was presented as an M.D. thesis by Dr Arash Velayati.