title: Confusion or delirium in patients with posterior cerebral arterial infarction.
abstract: OBJECTIVE
  To identify the possible anatomic sites and risk factors for the development of confusion or delirium in patients with posterior cerebral arterial (PCA) infarction.
  
  
  METHODS
  Twenty-nine patients aged 34-86 years with PCA infarction were divided into two groups: one with and the other without perturbed mentation. The clinical and laboratory data, including neuroimages, were retrospectively reviewed. Student-t, chi-square and Fisher's exact tests were performed for data analysis.
  
  
  RESULTS
  Confusion or delirium tended to develop in the left (10/13) or bilateral (5/5) PCA infarction as compared to the right PCA infarction (3/15) (P< 0.05) and medial occipital-temporal gyri involvement was crucial for its development (P< 0.05). The results were also noted in the patients with first-ever stroke. Diabetes mellitus was the sole biochemical factor to be associated with confusion or delirium (P< 0.01).
  
  
  CONCLUSIONS
  The involvement of the medial occipito-temporal gyri, especially on the left side was the pivotal factor for the development of confusion or delirium in patients with PCA infarction. Higher prevalence of diabetes mellitus was also observed in the group with mental perturbation.
authors.affiliation: Department of Neurology, China Medical University Hospital, Taichung, Taiwan.
authors.forename: Hsu-Tzu
authors.initials: HT
authors.lastname: Shih
authors.forename: Wei-Shih
authors.initials: WS
authors.lastname: Huang
authors.forename: Chung-Hsiang
authors.initials: CH
authors.lastname: Liu
authors.forename: Tzung-Chang
authors.initials: TC
authors.lastname: Tsai
authors.forename: Chung-Ta
authors.initials: CT
authors.lastname: Lu
authors.forename: Ming-Kuei
authors.initials: MK
authors.lastname: Lu
authors.forename: Ping-Kun
authors.initials: PK
authors.lastname: Chen
authors.forename: Chun-Hung
authors.initials: CH
authors.lastname: Tseng
authors.forename: Shuo-Bin
authors.initials: SB
authors.lastname: Jou
authors.forename: Chon-Haw
authors.initials: CH
authors.lastname: Tsai
authors.forename: Cheng-Chun
authors.initials: CC
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003221:Confusion / Q000209:etiology*; D003693:Delirium / Q000209:etiology*; D017548:Echocardiography, Transesophageal; D004562:Electrocardiography; D005260:Female; D006801:Humans; D020762:Infarction, Posterior Cerebral Artery / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D012307:Risk Factors