Table 3:

Amplitude and temporal parameters of vascular blood flow and CSF (cervical and ventricular) flows in patients with AS and controls^*

	AS	Control	P
No. of patients	17	20	NS
Age (yr)	39	44	NS
Vascular flows
Arterial mean flow (mL/min)	589 ± 115	607 ± 158	NS
Venous mean flow (mL/min)	379 ± 157	417 ± 158	NS
Arteriovenous delay (% of CC)	16 ± 12	19 ± 12	NS
Arteriovenous stroke volume (mL)	0.8 ± 0.2	0.8 ± 0.3	NS
Cervical flows
C2–C3 peak flush flow (mL/min)	157 ± 58	160 ± 54	NS
C2–C3 peak flush latency (% of CC)	6 ± 3	5 ± 4	NS
C2–C3 stroke volume (μL/CC)	499 ± 251	508 ± 166	NS
4th V flows
4th V peak flush latency (% CC)	4 ± 7	13 ± 8	.05
4th V stroke volume (μL/CC)	24 ± 18	24 ± 13	NS
Aqueductal level
Stroke volume (μL/CC)	∅	44 ± 25

Note:—NS indicates no significance;∅, absence of flow.

^*Results are represented by mean ± SD values.