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Cardiovascular diseases and hippocampal infarcts
Tuomas Rauramaa1, Maria Pikkarainen, Elisabet Englund
1Department of Pathology, Kuopio University Hospital, Finland.
Hippocampus
|January 8, 2010
Summary
Hippocampal infarcts, though linked to cognitive decline, were found in only 12% of the elderly population. Their association with cardiovascular issues was less pronounced than expected, warranting further research into underlying risk factors.
Area of Science:
- Neurology
- Neuroscience
- Gerontology
Background:
- Hippocampal lesions, including infarcts, are implicated in neurological conditions like epilepsy and age-related cognitive decline.
- Detailed prevalence studies of hippocampal infarcts in large, unselected populations are lacking.
Purpose of the Study:
- To determine the prevalence of hippocampal infarcts in a broad age range (1-99 years).
- To investigate the association of hippocampal infarcts with cardiovascular disorders, cerebrovascular lesions, and neurodegenerative conditions.
- To explore the relationship between hippocampal infarcts and clinical symptoms such as cognitive impairment and epilepsy.
Main Methods:
- A population-based study of 1,245 subjects (aged 1-99 years) was conducted.
- Prevalence of hippocampal infarcts was assessed.
- Associations with cardiovascular risk factors (hypertension, coronary disease, atrial fibrillation, heart failure), large hemispheric infarcts, and clinical outcomes (cognitive impairment, epilepsy) were analyzed.
Main Results:
- The overall prevalence of hippocampal infarcts was 12%, rising to 13% in subjects with diagnosed cognitive impairment.
- Large hemispheric infarcts were present in 31% of subjects and strongly associated with cardiovascular risk factors.
- Hippocampal infarcts showed significant association only with large hemispheric infarcts, heart failure, and a postmortem cardiovascular index. Widespread infarcts correlated with cognitive impairment or epilepsy.
Conclusions:
- The prevalence of hippocampal infarcts (12%) in the aged population is lower than anticipated, with weaker associations to common cardiovascular risk factors than expected.
- The link between hippocampal infarcts and clinical symptoms appears dependent on the extent of the lesion.
- Further research is needed to identify unknown risk factors influencing susceptibility to ischemia and neuronal degeneration in the hippocampus.
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