(HealthDay)—Cerebral hypoperfusion contributes to dizziness in patients with Parkinson’s disease (PD), even without orthostatic hypotension (OH), according to a study published online April 12 in the Journal of Clinical Ultrasound. Jinse Park, M.D., from Inje University in Busan, South Korea, and colleagues conducted transcranial Doppler and blood pressure monitoring for 10 minutes during the head-up tilt...