title: Angiographic analysis of venous drainage and a variant basal vein of Rosenthal in spontaneous idiopathic subarachnoid hemorrhage.
abstract: The aim of this study was to examine the clinical characteristics and angiographic findings of spontaneous idiopathic subarachnoid hemorrhage (ISAH) and to compare these with those of aneurysmal SAH (ASAH). We retrospectively reviewed the clinical characteristics and venograms of 118 consecutive patients with ISAH during the past 10years for possible abnormalities in venous structures. Also, 57 patients with ASAH during the past 4years were examined. Patients with ISAH showed low frequency of hypertension and no patient suffered from an episode of re-bleeding, or delayed ischemic deficits. Physical actions, including varieties of the Valsalva maneuver, were the causes of ISAH in 17 (29.8%) patients. Compared with patients with ASAH, patients with ISAH showed a significant difference in the drainage patterns of the basal vein of Rosenthal (BVR) (p=0.001). In addition, whereas a linearly decreasing trend toward the primitive type was evident in ASAH, each drainage pattern was distributed evenly in ISAH (linear by linear association, p=0.000). In this study, the primitive drainage pattern of BVR has a relationship with ISAH compared to ASAH. The way in which this venous configuration might influence bleeding remains unknown.
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 IL-Won Dong, Kang-Nam Ku, Seoul 135-710, Republic of Korea.
authors.forename: Ji Hye
authors.initials: JH
authors.lastname: Song
authors.forename: Je Young
authors.initials: JY
authors.lastname: Yeon
authors.forename: Kun Ha
authors.initials: KH
authors.lastname: Kim
authors.forename: Pyung
authors.initials: P
authors.lastname: Jeon
authors.forename: Jong Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Seung-Chyul
authors.initials: SC
authors.lastname: Hong
mesh_terms: D000328:Adult; D000368:Aged; D015984:Causality; D020785:Central Nervous System Vascular Malformations / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology; D002533:Cerebral Angiography / Q000379:methods*; D002550:Cerebral Veins / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D019586:Intracranial Hypertension / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology; D014636:Valsalva Maneuver / Q000502:physiology