title: Intracranial hemorrhage associated with cerebral hyperperfusion syndrome following carotid endarterectomy and carotid artery stenting: retrospective review of 4494 patients.
abstract: OBJECTIVE
  Intracranial hemorrhage associated with cerebral hyperperfusion syndrome (CHS) following carotid endarterectomy (CEA) or carotid artery stenting (CAS) is a rare but potentially devastating complication. In the present study the authors evaluated 4494 patients with carotid artery stenosis who had undergone CEA or CAS to clarify the clinicopathological features and outcomes of those with CHS and associated intracranial hemorrhage.
  
  
  METHODS
  Patients with postoperative CHS were retrospectively selected, and clinicopathological features and outcomes were studied.
  
  
  RESULTS
  Sixty-one patients with CHS (1.4%) were identified, and intracranial hemorrhage developed in 27 of them (0.6%). The onset of CHS peaked on the 6th postoperative day in those who had undergone CEA and within 12 hours in those who had undergone CAS. Results of logistic regression analysis demonstrated that poor postoperative control of blood pressure was significantly associated with the development of intracranial hemorrhage in patients with CHS after CEA (p = 0.0164). Note, however, that none of the tested variables were significantly associated with the development of intracranial hemorrhage in patients with CHS after CAS. Mortality (p = 0.0010) and morbidity (p = 0.0172) rates were significantly higher in patients with intracranial hemorrhage than in those without.
  
  
  CONCLUSIONS
  Cerebral hyperperfusion syndrome after CEA and CAS occurs with delayed classic and acute presentations, respectively. Although strict control of postoperative blood pressure prevents intracranial hemorrhage in patients with CHS after CEA, there appears to be no relationship between blood pressure control and intracranial hemorrhage in those with CHS after CAS. Finally, the prognosis of CHS in patients with associated intracerebral hemorrhage is poor.
authors: Department of Neurosurgery, Iwate Medical University, Morioka, Japan. kuogasa@iwate-med.ac.jp
authors: Kuniaki
authors: K
authors: Ogasawara
authors: Nobuyuki
authors: N
authors: Sakai
authors: Terumasa
authors: T
authors: Kuroiwa
authors: Kohkichi
authors: K
authors: Hosoda
authors: Koji
authors: K
authors: Iihara
authors: Kazunori
authors: K
authors: Toyoda
authors: Chiaki
authors: C
authors: Sakai
authors: Izumi
authors: I
authors: Nagata
authors: Akira
authors: A
authors: Ogawa
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000959:Antihypertensive Agents / Q000627:therapeutic use; D002339:Carotid Arteries; D016893:Carotid Stenosis / Q000628:therapy*; D002561:Cerebrovascular Disorders / Q000209:etiology*; D016894:Endarterectomy, Carotid / Q000009:adverse effects*; D005260:Female; D006801:Humans; D020299:Intracranial Hemorrhage, Hypertensive / Q000209:etiology* / Q000401:mortality / Q000517:prevention & control; D008297:Male; D008875:Middle Aged; D011182:Postoperative Care; D011379:Prognosis; D012189:Retrospective Studies; D015607:Stents / Q000009:adverse effects*; D013997:Time Factors
chemical_list: D000959:Antihypertensive Agents