Changes in regional cerebral blood flow abnormalities in late-life depression following response to electroconvulsive therapy

Psychiatry and Clinical Neurosciences
Shuichi AwataMitsumoto Sato

Abstract

The impact of electroconvulsive therapy (ECT) on the regional cerebral blood flow (rCBF) abnormalities in late-life depression is still unknown and the clinical significance of these findings in late-life depression has not been fully discussed. Using single photon emission computed tomography (SPECT) with 99mTc-hexamethylpropylene amine oxime (99mTc-HMPAO), we examined the changes of rCBF patterns in nine late-life patients with major depressive episodes before and following response to ECT compared with nine age- and sex-matched healthy volunteers. Statistical comparisons were made on both region-of-interest (ROI) and voxel-by-voxel bases. In ROI-based analyses, a mean rCBF was significantly decreased in the patients before ECT compared with the control, significantly increased (normalized) in the patients 2 weeks after ECT compared with that before ECT, and still increased in the patients 12 weeks after ECT compared with that before ECT. In voxel-by-voxel analyses, a significant rCBF reduction was found in the bilateral pre- and subcallosal anterior cingulate cortex, the bilateral caudal orbitofrontal cortex, the right insular cortex and the right posterior middle frontal gyrus in patients before ECT compared with the contro...Continue Reading

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Citations

Mar 5, 2008·Journal of Neural Transmission·Martin ChristBettina Pfleiderer
Sep 24, 2010·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Diego A Pizzagalli
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