Table 2

Characteristics of patients and dural arteriovenous fistulae according to duplex sonographic results

Abnormal CDS* (n = 32)Normal CDS (n = 31)p Value
Age (years) (mean (SD))55 (14)53 (16)0.85
Sex0.02
    Male7 (30)16
    Female25 (63)15
Location of DAVF<0.001
    Cavernous sinus0 (0)17
    Non-cavernous sinus32 (70)14
Type of DAVF0.32
    I or IIa20 (57)15
    IIb, IIa+b, III, IV or V12 (43)16
Clinical manifestations1
    Aggressive9 (50)9
    Non-aggressive23 (51)22
  • *CDS study showing both the ECA RI <0.7 and the ICA to ECA RI ratio >0.9 indicates abnormal.

  • Values are number (diagnostic sensitivity) or mean (SD).

  • CDS, carotid duplex sonography; DAVF, dural arteriovenous fistulae.