Parkinson's disease and multiple system atrophy feature cardiovascular dysautonomia.
The key feature is orthostatic hypotension, along with supine/nocturnal hypertension.
Recent works link white matter lesions and dysautonomia in both diseases.
Cerebral autoregulation is preserved in a range adapting to lower mean blood pressure.
Pathologic adaptations may trigger cerebrovascular damage in dysautonomic patients.