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Ann Thorac Surg 2002;73:1178-1179
© 2002 The Society of Thoracic Surgeons

Invited commentary

^a Virginia Mason Medical Center, Cardiothoracic Surgery, X3-CAR, 1100 Ninth Ave, Seattle, WA 98111, USA

e-mail: ctsrah@vmmc.org

I commend the authors for obtaining control groups for this study. The authors choose healthy age matched controls for single photon emission computed tomography (SPECT) scanning, and this is certainly reasonable. We found that at any age, better-educated subjects tended to have better baseline cerebral perfusion as measured by SPECT. I wonder if the test subjects and control group individuals were similar in terms of education level, activity level, and measures of independence, all of which influence global and regional cerebral blood flow (CBF). Regardless, the . . . [Full Text of this Article]

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