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Published on: November 20, 2015
Clinical characteristics of magnetic resonance imaging-defined subcortical ischemic depression
K Ranga Rama Krishnan1, Warren D Taylor, Douglas R McQuoid
1Department of Psychiatry, Duke University Medical Center, DUMC 3950, Durham, NC 27710, USA.
Insights
Subcortical ischemic vascular depression is a distinct syndrome in late-life depression. This condition is more prevalent in older adults with hypertension and lassitude.
Area of Science:
- Geriatric Psychiatry
- Neuroimaging
- Vascular Neurology
Background:
- The vascular depression hypothesis is supported by extensive research.
- Subcortical ischemic vascular depression is proposed as a more precise term for late-life depression.
- Investigating this diagnosis as a construct is crucial for understanding the disease process.
Purpose of the Study:
- To examine differences between depressed elderly subjects with and without subcortical ischemic vascular depression.
- To validate subcortical ischemic vascular depression as a specific diagnostic construct.
- To update the vascular depression hypothesis with recent findings.
Main Methods:
- A case-control study involving 139 depressed elderly subjects.
- Neuroimaging (magnetic resonance imaging) was used to define subcortical ischemic vascular depression.
- Comparison of demographic, psychiatric, medical, and family history, depressive symptoms, and functional impairment between groups.
Main Results:
- 54% of subjects met neuroimaging criteria for subcortical ischemic vascular depression.
- Increased prevalence was associated with older age, lassitude, and a history of hypertension.
- Negative associations were found with a family history of mental illness and loss of libido.
Conclusions:
- Data support subcortical ischemic vascular depression as a specific syndrome within late-life depression.
- Further research is needed to fully characterize this disorder.
- Future studies should focus on cognitive function and treatment implications.
Background:
There is a substantial body of research supporting the vascular depression hypothesis of late-life depression. To update this hypothesis so it incorporates recent research, we propose that the term subcortical ischemic vascular depression may be a more accurate representation of the disease process. We sought to investigate this diagnosis as a construct by examining differences between depressed subjects with and without magnetic resonance imaging defined subcortical ischemic vascular depression.
Methods:
This case-control study examined 139 depressed elderly subjects. Demographic data, psychiatric, medical, and family history, depressive symptomatology, and functional impairment were compared between groups dichotomized based on neuroimaging findings.
Results:
Seventy-five (54%) of the subjects met neuroimaging criteria for subcortical ischemic vascular depression. Age was most strongly associated with increased prevalence of subcortical ischemic vascular depression. Lassitude and a history of hypertension were also positively associated with the diagnosis; a family history of mental illness and loss of libido were negatively associated with the diagnosis.
Conclusions:
These data support that subcortical ischemic vascular depression may be a specific syndrome from other types of late-life depression. Further research is needed to further characterize this disorder, particularly in regards to cognitive function and treatment implications.
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