Abstract
Traumatic brain injury (TBI) frequently results in cerebrovascular lesions that may increase secondary damage and cause neuropsychological impairment. Previous studies suggest an association among the insertion/deletion (I/D) polymorphism of the angiotensin-converting enzyme (ACE), cardiovascular disease, and cognitive performance. Clinical and experimental studies have demonstrated the beneficial effects of ACE inhibitor treatment on vascular injury, hypertension, brain ischemia, and cognitive functioning. In a sample of 73 moderate and severe TBI patients, the authors assessed whether cognitive sequelae differed in relation to the ACE I/D polymorphism. D allele carrier patients performed worse than those with I/I polymorphism on tests involving attention and processing speed. Findings suggest that the physiopathological changes associated with TBI may have greater consequences in ACE D allele carriers.
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