RT Book, Section
A1 Hemphill, III, J. Claude
A1 Smith, Wade S.
A1 Gress, Daryl R.
A2 Loscalzo, Joseph
A2 Fauci, Anthony
A2 Kasper, Dennis
A2 Hauser, Stephen
A2 Longo, Dan
A2 Jameson, J. Larry
SR Print(0)
ID 1201833124
T1 Subarachnoid Hemorrhage
T2 Harrison's Principles of Internal Medicine, 21e
YR 2022
FD 2022
PB McGraw-Hill Education
PP New York, NY
SN 9781264268504
LK accessmedicine.mhmedical.com/content.aspx?aid=1201833124
RD 2024/04/24
AB Subarachnoid  hemorrhage  (SAH)  renders  the  brain  critically  ill  from  both  primary  and  secondary  brain  insults.  Excluding  head  trauma,  the  most  common  cause  of  SAH  is  rupture  of  a  saccular  aneurysm.  Other  causes  include  bleeding  from  a  vascular  malformation  (arteriovenous  malformation  or  dural  arteriovenous  fistula)  and  extension  into  the  subarachnoid  space  from  a  primary  intracerebral  hemorrhage.  Some  idiopathic  SAHs  are  localized  to  the  perimesencephalic  cisterns  and  are  benign;  they  probably  have  a  venous  or  capillary  source,  and  angiography  is  unrevealing.