Changes in the regional cerebral blood flow detected by arterial spin labeling after 6-week escitalopram treatment for major depressive disorder

Journal of Affective Disorders
Yoko KaichiKazuo Awai

Abstract

A few studies have used pseudo-continuous arterial spin labeling (pCASL) to assess the regional cerebral blood flow (rCBF) in patients with major depressive disorder (MDD). However, rCBF changes during treatment with escitalopram have not been studied in detail. We used pCASL to investigate the effect of 6-week escitalopram treatment on the rCBF in MDD patients. We subjected 53 MDD patients and 36 controls to pCASL (T1, baseline). The patients then received treatment with escitalopram for 6 weeks and 27 were scanned again (T2). We used selected regions of interest that exhibited differences between the controls and patients at T1 and compared the T2 rCBF in the patients with the T1 rCBF of the controls. We also compared the T1 and T2 rCBF in the patients to assess their response to escitalopram. After 6-week treatment with escitalopram, the rCBF in the patients' left inferior temporal gyri, the middle- and inferior frontal gyri, and the subgenual anterior cingulate, which had been higher at T1 than in the controls, was decreased. Their rCBF in the right lingual gyrus remained significantly lower at T2. We did not have a placebo-control group and the number of patients available at T2 was small. In MDD patients, 6-week escitalop...Continue Reading

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