Characteristics of symptomatic and asymptomatic patients
| Symptomatic | Asymptomatic | |||
| Abnormal | Normal | Abnormal | Normal | |
| No of patients | 23 | 13 | 16 | 8 |
| Benzodiazepine receptor index (%) | ||||
| MCA territory (affected) | 41.1±36.4 | 25.9±32.8 | 23.4±19.1 | 23.4±22.6 |
| ACA territory | 21.2±19.0* | 11.0±16.8 | 16.0±13.4 | 9.4±11.3 |
| Cerebral blood flow (ml/100 g/min) | ||||
| MCA territory | 40.3±7.0 | 44.1±9.3 | 45.8±7.8 | 46.7±8.3 |
| ACA territory | 43.2±8.1 | 46.0±10.1 | 48.1±8.5 | 49.4±11.4 |
| Cerebral metabolic rate of oxygen (ml/100 g/min) | ||||
| MCA territory | 3.61±0.38 | 3.61±0.34 | 3.55±0.49 | 4.10±0.55 |
| ACA territory | 3.74±0.40 | 3.60±0.36 | 3.63±0.41 | 4.29±0.72 |
| Age (years) | 65±9 | 62±11 | 66±6 | 60±8 |
| Sex, male/female (n) | 14/9 | 10/3 | 14/2 | 7/1 |
| Arterial disease, internal carotid artery/MCA (n) | 15/8 | 8/5 | 13/3 | 7/1 |
| Side of disease, left/right (n) | 11/12 | 6/7 | 8/8 | 3/5 |
| Subcortical infarction (n) | 23 | 12 | 8 | 2 |
| Size (mm2) | 197±225 | 182±204 | 52±90 | 76±211 |
| Frontal infarction (n) | 16 | 10 | 5 | 0 |
| Wisconsin Card Sorting Test parameters (n) | ||||
| Categories achieved | 1.7±0.9* | 4.3±1.1 | 0.8±0.9* | 4.7±1.0 |
| Total errors | 28.2±8.6* | 16.4±4.5 | 29.2±5.1* | 15.1±3.7 |
| Perseverative errors (Nelson) | 12.4±9.9* | 3.6±3.4 | 9.2±4.2* | 3.3±2.3 |
Values are mean±SD.
↵* p<0.05, Mann–Whitney U test.
Abnormal, low categories achieved on the Wisconsin Card Sorting Test; ACA, anterior cerebral artery; MCA, middle cerebral artery.