The Role of Deep Cerebral Vein Variation in Patients With Angiographic Negative Subarachnoid Hemorrhage

The Role of Deep Cerebral Vein Variation in Patients With Angiographic Negative Subarachnoid Hemorrhage

The incidence of Rosenthal basilar vein (BVR) variants (deep venous drainage variants) was relatively increased in patients with AN-SAH compared with patients with aneurysms. However, the inclusion criteria for AN-SAH patients in these studies were different. Some studies have investigated both PAN-SAH and NPAN-SAH, while some studies have only investigated PAN-SAH patients. However, we believe that NPAN-SAH may be the bleeding caused by non-BVR variation. Although previous studies did not find any association between NPAN-SAH and BVR variants, the results in their study were different, which may be due to the limited number of cases.

Inclusion Criteria:

Patients with negative subarachnoid hemorrhage diagnosed by DSA

Exclusion Criteria:

1. In patients with aneurysms, external ventricular drainage (EVD) alone or decompression craniotomy alone or conservative treatment was performed
2. Have a history of trauma or prior brain injury (stroke, cerebral hemorrhage, etc., with associated chronic changes on CT)
3. Patients with loss of imaging data and severe comorditions prior to onset of SAH