Changes in TCD Findings after Subarachnoid Hemorrhage

Abstract

We performed transcranial Doppler sonography (TCD) in patients after subarachnoid hemorrhage (SAH) and observed the changes in mean flow velocity (MFV) in the bilateral middle cerebral arteries (MCA) .
Materials and methods: We examined MFV in both MCAs in 22 SAH patients using TCD (EME TC2-64, Germany) for two weeks after admission, and investigated the side of MFV elevation, presence of SAH on CT, presence of aneurysm, and the side on which surgery was performed. Results: Elevation of MFV to (more than 120 cm/sec) was found in 12 cases (54.5%) . Ipsilateral MFV was initially elevated on the side of SAH in six cases, and on the contralateral side in the other six. Contralateral MFV was elevated after ipsilateral MFV in three cases. Conclusions: Ipsilateral MFV becomes elevated earlier when SAH exists on one side of the sylvian fissure, but sometimes contralateral MFV becomes elevated earlier regardless of the side of aneurysm or surgery when SAH exists on both sides of the sylvian fissure.