Attributing Hypodensities on CT to Angiographic Vasospasm Is Not Sensitive and Unreliable

Attributing hypodensities on CT to angiographic vasospasm is not sensitive and unreliable.

BACKGROUND AND PURPOSE The presence of low-density areas on CT is used in clinical decision-making regarding treatment of angiographic vasospasm as well as in research as a surrogate marker for severity of angiographic vasospasm. We assess the interobserver variability in attributing hypodensities on CT to angiographic vasospasm-related delayed ischemic neurological deficit. METHODS Three exp...

Striatal Hypodensities, Not White Matter Hypodensities on CT, Are Associated with Late-Onset Depression in Alzheimer's Disease

This study examined whether there were neuroanatomical differences evident on CT scans of individuals with dementia who differed on depression history. Neuroanatomical variables consisted of visual ratings of frontal lobe deep white matter, subcortical white matter, and subcortical gray matter hypodensities in the CT scans of 182 individuals from the Study of Dementia in Swedish Twins who were ...

CT angiography of cerebral vasospasm with conventional angiographic comparison.

Two patients with subarachnoid hemorrhage underwent CT angiography and conventional angiography at presentation. In each patient, both studies were repeated after the onset of intracranial vasospasm. In both cases, CT angiograms were able to demonstrate convincingly the conventional angiographic findings. CT angiography may prove useful in the evaluation of vasospasm in patients with subarachno...

[Sensitive nose is not to be despised].

Angiographic vasospasm and release of platelet thromboxane after subarachnoid hemorrhage.

We studied adenosine diphosphate-induced platelet aggregation and the associated release of thromboxane B2 in 49 patients with subarachnoid hemorrhage in relation to angiographic vasospasm. Postoperative cerebral angiography was performed less than or equal to 3 (median 1) days after surgery for an aneurysm 5-14 days after subarachnoid hemorrhage. Correspondingly, one sample from each patient w...