Research Article
Implications of the Presence of Hyperdense Middle Cerebral Artery Sign in Determining the Subtypes of Stroke Etiology
Table 3
Characteristics of HMCAS in different stroke subtypes.
| | Characteristics | Total () | Cardioembolism () | LAA () | Others () | value |
| | Thrombus location | | ICA—no. (%) | 9 (9.1) | 7 (12.1) | 1 (4.6) | 1 (5.3) | 0.495 | | MCA-M1—no. (%) | 59 (59.6) | 30 (51.7) | 15 (68.2) | 14 (73.7) | | MCA-M2—no. (%) | 31 (31.3) | 21 (36.2) | 6 (27.3) | 4 (21.1) | | HMCAS length—median (IQR) | 15.8 (11.8-22.8) | 18.1 (12.2-24.2) | 13.9 (11.9-21) | 13.3 (9.4-25.2) | 0.241 | | HMCAS disappearance—no. (%) | 72 (75.8) | 34 (63.0) | 20 (91.0) | 18 (94.7) | 0.004 | | Type of HMCAS disappearance | | No longer seen—no. (%) | 23 (31.9) | 7 (20.6) | 9 (45) | 7 (38.9) | 0.055 | | Decreased attenuation—no. (%) | 42 (58.3) | 25 (73.5) | 10 (50) | 7 (38.9) | | Migration—no. (%) | 7 (9.7) | 2 (5.9) | 1 (5) | 4 (22.2) |
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HMCAS: hyperdense middle cerebral artery sign; ICA: internal carotid artery; IQR: interquartile range; LAA: large-artery atherosclerosis; MCA-M1: middle cerebral artery-M1 segment; MCA-M2: middle cerebral artery-M2 segment.
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