BACKGROUND AND PURPOSE: The yield of DSA in patients with SAH and negative initial
noninvasive neurovascular examinations (CTA or MRA) is not well-understood. This study …

BACKGROUND: The yield of repeat catheter angiography in patients with subarachnoid
hemorrhage (SAH) who have negative initial catheter and computed tomography (CT) …

Purpose This study aimed to determine the yield of repetitive catheter angiography (digital
subtraction angiography (DSA)) for the detection of causative vascular lesions in patients …

BACKGROUND AND PURPOSE: Nearly 20% of patients with spontaneous SAH have no
definitive source on initial DSA. The purpose of this study was to investigate the timing and …

Object. The aim of this study was to assess the diagnostic yield of imaging tests performed in
patients in whom the cause of subarachnoid hemorrhage (SAH) had not been demonstrated …

Purpose The yield of delayed neurovascular imaging in patients with subarachnoid
hemorrhage (SAH), negative initial CT and catheter angiograms (CT angiography (CTA) …

OBJECTIVE: The evaluation of patients with subarachnoid hemorrhage (SAH) with negative
initial catheter-based angiography is a diagnostic challenge. Better diagnostic strategies …

Object The yield of CT angiography (CTA) and MR angiography (MRA) in patients with
subarachnoid hemorrhage (SAH) who have a negative initial catheter angiogram is currently …

BACKGROUND AND PURPOSE: CTA is becoming the frontline modality to reveal
aneurysms in patients with SAH. However, in about 20% of SAH patients no aneurysm is …

BACKGROUND AND PURPOSE: CT angiography is increasingly used to evaluate patients
with nontraumatic subarachnoid hemorrhage given its high sensitivity for aneurysms. We …