Table 1.
Degree of ICA stenosis at the most recent duplex scan prior to 24-h TCD monitoring †.
| Patient/artery number | Study ICA side | Degree of study ICA stenosis (%) | Study ICA PSV | Study ICA EDV | Study ICA stenosis summary | Contralateral ICA stenosis degree | Contralateral ICA PSV | Contralateral ICA EDV |
|---|---|---|---|---|---|---|---|---|
| 1 | Right | 60–70 | 205 | 48 | Stable Since December 1998 | 0 | 54 | 16 |
| 2 | Left | 50–69* | 177 | 54 | Stable since March 2000 | <20 | 56 | 17 |
| 3 | Left | 60–70 | 179 | 34 | Stable Since October 1999 | Occluded | 0 | 0 |
| 4 | Right | 70–80 | 249 | 61 | Overall stable since June 1997 | 0 | 93 | 31 |
| 5 | Left | 80–90 | 300 | 90 | Reduced from >90% in August 1996 | 0 | 97 | 30 |
| 6 | Right | 60–70 | 191 | 37 | Progression from 50–60% in November 1996 | 0 | 81 | 20 |
| 7 | Left | 90–99 | 506 | 219 | Stable since July 1998 | 0 | 51 | 24 |
| 8 | Left | 90–99 | 392 | 134 | Stable since September 1996 | <50 | 120 | 43 |
| 9 | Right | 90–99 | 343 | 93 | Stable since November 1997 | 80–90 | 310 | 54 |
| 10 | Left | 70–80 | 243 | 58 | Stable since February 1999 | 60–70 | 186 | 53 |
†PSV, peak systolic velocity; EDV, end diastolic velocity; ICA, internal carotid artery.
*
Subject two was recruited to the ASED study from the Box Hill Hospital using a left ICA PSV of ≥ 150 centimetres/second, other criteria derived from Australasian Society for Ultrasound Medicine and the mid-point of the reported stenosis range (see main text).