title: Magnetic resonance assessment of cerebral perfusion in depressed cardiac patients: preliminary findings.
abstract: OBJECTIVE
  The authors investigated the links between depression, cardiac disease, and microcirculatory cerebral blood flow (CBF).
  
  
  METHODS
  A magnetic resonance imaging technique based on arterial spin tagging was used to estimate microcirculatory CBF in depressed (N = 5) and comparison (N = 14) elderly subjects with coronary artery disease. Signal intensity ratios corresponding to relative microcirculatory CBF were calculated for four regions on two axial images through the upper and lower halves of the lateral ventricles.
  
  
  RESULTS
  On the superior image, estimates of microcirculatory CBF were statistically significantly lower on the left side in the depressed subjects than in the nondepressed group. When the ratios in the superior and inferior images were averaged, the depressed subjects had lower values for both left periventricular regions of interest and the parietal region.
  
  
  CONCLUSIONS
  Despite the small study group and indirect estimates of blood flow, these preliminary findings suggest that a relative cerebral hypoperfusion may underlie depression in elderly cardiac patients.
authors.affiliation: Department of Psychiatry, Duke University Medical Center, Durham, NC 27710, USA. murali@acpub.duke.edu
authors.forename: P M
authors.initials: PM
authors.lastname: Doraiswamy
authors.forename: J
authors.initials: J
authors.lastname: MacFall
authors.forename: K R
authors.initials: KR
authors.lastname: Krishnan
authors.forename: C
authors.initials: C
authors.lastname: O'Connor
authors.forename: X
authors.initials: X
authors.lastname: Wan
authors.forename: M
authors.initials: M
authors.lastname: Benaur
authors.forename: M
authors.initials: M
authors.lastname: Lewandowski
authors.forename: M
authors.initials: M
authors.lastname: Fortner
mesh_terms: D000367:Age Factors; D000368:Aged; D001921:Brain / Q000098:blood supply*; D015897:Comorbidity; D003327:Coronary Disease / Q000175:diagnosis* / Q000453:epidemiology / Q000503:physiopathology; D003866:Depressive Disorder / Q000175:diagnosis* / Q000453:epidemiology / Q000503:physiopathology; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008833:Microcirculation / Q000503:physiopathology*; D008875:Middle Aged; D012039:Regional Blood Flow