title: The relationship between perimesencephalic subarachnoid hemorrhage and deep venous system drainage pattern and calibrations.
abstract: OBJECTIVE
  The purpose of this study is to investigate the relationship between Rosenthal basal vein (BVR) type and diameter and perimesencephalic nonaneurysmal subarachnoid hemorrhage (P-SAH).
  
  
  METHODS
  Aneurysmal subarachnoid hemorrhage (A-SAH), P-SAH, and control groups were evaluated, and BVRs were classified by type. BVR diameters in patients were measured.
  
  
  RESULTS
  There was a statistically significant difference of BVR drainage types between groups (P=.002). BVR diameters of patients with normal drainage pattern in P-SAH group were significantly smaller than those in both other groups (P<.001).
  
  
  CONCLUSIONS
  There is a relationship between P-SAH and BVR primitive drainage type. P-SAH risk increases in parallel with decreasing caliber of BVR in patients with normal drainage pattern.
authors.affiliation: Duzce University School of Medicine, Department of Radiology. Electronic address: rbuyukkaya@gmail.com.
authors.forename: Ramazan
authors.initials: R
authors.lastname: Buyukkaya
authors.affiliation: Uludag University School of Medicine, Department of Radiology.
authors.forename: Nalan
authors.initials: N
authors.lastname: Yıldırım
authors.affiliation: Uludag University School of Medicine, Department of Radiology.
authors.forename: Hakan
authors.initials: H
authors.lastname: Cebeci
authors.affiliation: Uludag University School of Medicine, Department Neurosurgery.
authors.forename: Hasan
authors.initials: H
authors.lastname: Kocaeli
authors.affiliation: Dıcle University School of Medicine, Department of Radiology.
authors.forename: Abdürrahim
authors.initials: A
authors.lastname: Dusak
authors.affiliation: Uludag University School of Medicine, Department of Biostatistics.
authors.forename: Gökhan
authors.initials: G
authors.lastname: Ocakoğlu
authors.affiliation: Uludag University School of Medicine, Department of Radiology.
authors.forename: Cüneyt
authors.initials: C
authors.lastname: Erdoğan
authors.affiliation: Uludag University School of Medicine, Department of Radiology.
authors.forename: Bahattin
authors.initials: B
authors.lastname: Hakyemez
mesh_terms: D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction / Q000379:methods / Q000592:standards; D002138:Calibration; D002533:Cerebral Angiography / Q000379:methods / Q000592:standards; D002550:Cerebral Veins / Q000000981:diagnostic imaging / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008636:Mesencephalon / Q000098:blood supply* / Q000000981:diagnostic imaging*; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000503:physiopathology*
keywords: Cerebral angiography; Perimesencephalic nonaneurysmal subarachnoid hemorrhage; Venous drainage