TABLE.
Characteristics of the Sample and Trans-stenotic Measurements
| N | Age (years) | Sex | Presentation | Location of stenosis | Visual stenosis (%) | Reference diameter (mm) | Minimal lumen diameter (mm) | QA stenosis (%) | Proximal pressure (mm Hg) | Distal pressure (mm Hg) | PDPG (mm Hg) | DPPR (mm Hg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 53 | W | Stroke, moyamoya | R cavernous ICA | 99 | 2 | 0.25 | 87.5 | 128 | 71 | 57 | 0.55 |
| 2 | 84 | W | Stroke, recurrent | R cavernous ICA | 80 | 3.15 | 0.6 | 80.8 | 103 | 50 | 53 | 0.48 |
| 3 | 26 | W | SAH | L supraclinoid ICA | 75 | 2.65 | 0.5 | 81.2 | 120 | 67 | 53 | 0.56 |
| 4 | 63 | M | TIA | L MCA M1 | 99 | 3.45 | 0.2 | 94.2 | 114 | 58 | 56 | 0.51 |
| 5 | 61 | W | Stroke, multivessel ICAD | R supraclinoid ICA | 70 | 3.8 | 0.85 | 77.6 | 141 | 85 | 56 | 0.60 |
| 6 | 64 | M | Stroke, stenosis after MT | L MCA M1 | 70 | 2.5 | 0.5 | 79.8 | 103 | 65 | 38 | 0.63 |
| 7 | 54 | W | FDD edge stenosis | L MCA M1 | 90 | 2.45 | 0.45 | 81.4 | 94 | 36 | 58 | 0.38 |
| 8 | 27 | W | TIA | L supraclinoid ICA | 95 | 1.825 | 0.25 | 86.3 | 69 | 34 | 35 | 0.49 |
| 9a | 72 | M | TIA | L MCA M1 | 95 | 2.35 | 0.45 | 80.9 | 110 | 65 | 45 | 0.59 |
| Pooled | 56 (26-84) | 85.9 ± 12.2 | 2.7 ± 0.7 | 0.45 ± 0.2 | 83.3 ± 5.1 | 109.1 ± 20.7 | 59 ± 16.6 | 50.1 ± 8.6 | 0.53 ± 0.08 |
DPPR: distal/proximal pressure ratio; FDD: flow-diversion device; ICA: internal carotid artery; ICAD: intracranial atherosclerotic disease; L: left; M: man; MCA: middle cerebral artery; MT: mechanical thrombectomy; PDPG: proximal minus distal pressure gradient; QA: quantified; R: right; SAH: subarachnoid hemorrhage; TIA: transient ischemic attack; W: woman.
aCase 9 is depicted in Figure 1.