Abstract
In order to investigate whether combined measurement of the systemic vascular resistance index (SVRI) by Swan-Ganz catheter examination and transcranial Doppler (TCD) monitoring of cerebral blood flow velocity is more useful than TCD monitoring alone for detection of vasospasm after subarachnoid hemorrhage (SAH), we performed both examinations serially on 20 patients with SAH and compared the results with those of serial cerebral angiographic examinations for diagnosis of vasospasm. The TCD and SVRI criteria for vasospasm were > 120cm/s and > 1200, respectively. Cerebral angiography detected vasospasm in seven of the patients. TCD monitoring demonstrated an accuracy of 70% for diagnosis of vasospasm, while a combination of SVRI and TCD monitoring demonstrated an accuracy of 90%. Thus SVRI measurement in addition to TCD monitoring appears to allow accurate evaluation of vasospasm.
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