This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The goal of this study is to assess the impact of diabetic autonomic neuropathy with orthostatic hypotension (OH) on cerebral vasoregulation and determine the factors indicative of silent cerebrovascular disease in diabetes. OH is the most severe feature of autonomic neuropathy and increases the risk for stroke. To quantify the effects of diabetic autonomic neuropathy with OH on cerebral vasoregulation, a comparative experimental study will evaluate vasomotor reactivity of cerebral arteries using transcranial Doppler (TCD) ultrasonography in non-randomized diabetic patients with and without OH and 40 non-diabetic controls. This study may have potential clinical impact and it may help to identify the population of elderly diabetic patients at risk for stroke.
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