Ultrasonographic Changes in Brain Hemodynamics in Patients with Parkinson’s Disease and Risk Factors for Cerebrovascular Disease: A Pilot Study

Table 1

Comparison between groups of Parkinson’s disease phenotypes (akinetic-rigid x classic).

	Akinetic-rigid	Classic	value
Variables	n = 10	n = 17
Age (years)	64.5	64.2	0.92
RI	0.6	0.51	0.03
PI	0.99	0.77	0.03
AI	0.48	0.96	0.05
VM after apnea (cm/s)	44.62	52.17	0.19
Altered cVR
No = AI ≥ 0.70	2 (20)	11 (65)	0.02
Yes = AI < 0.69	8 (80)	6 (35)
Duration of symptoms (years, mean ± SD)	5.60	5.88	0.98
Daily dose of levodopa (mg)	620.0	552.94	0.37

RI: resistance index. PI: pulsatility index. AI: apnea index. cVR: cerebrovascular reactivity.