Table 2:

MRV and Doppler sonography findings in healthy controls at baseline and 6-month follow-up^a

Healthy Controls	TOF		TRICKS		DS
Healthy Controls	RIJV	LIJV	RIJV	LIJV	RIJV	LIJV
1–baseline	Normal	Normal	Normal	Normal	Normal	Normal
1–6 mo	Normal	Normal	Normal	Normal	Normal	Normal
2–baseline	Normal	Normal	Normal	Normal	Normal	Normal
2–6 mo	Normal	Abnormal	Normal	Abnormal	Normal	Normal
3–baseline	Normal	Normal	Normal	Normal	Normal	Normal
3–6 mo	Normal	Normal	Normal	Normal	Normal	Normal
4–baseline	Normal	Normal	Normal	Normal	Normal	Normal
4–6 mo	Normal	Normal	Normal	Normal	Normal	Normal
5–baseline	Abnormal	Normal	Abnormal	Normal	Normal	Abnormal
5–6 mo	Normal	Normal	Abnormal	Normal	Abnormal	Normal
6–baseline	Normal	Normal	Normal	Normal	Normal	Abnormal
6–6 mo	Normal	Normal	Normal	Normal	Normal	Abnormal

a Absent and pinpoint IJV flow was considered abnormal on TOF and TRICKS; the presence of at least 1 of the following IJV parameters was considered abnormal on a DS examination: B-mode abnormalities (flaps, septa, and web), stenoses, absence of detectable flow, and presence of reflux in both sitting and supine positions.