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| TCD signal waveform | MCA (n = 88) | BA (n = 44) |
|---|---|---|
| Normal | 6 | 3 |
| Decreased diastole | 11 | 3 |
| Diastolic reverse flow | 46 | 14 |
| Very small systolic spikes | 24 | 15 |
| Undetectable flow | 1 | 9 |
BA, basilar artery; MCA, middle cerebral artery.
