Since it is a rare disorder, it is difficult to say what the premonitory symptoms are.

由于这是一种罕见的病症，我们很难说清楚它的初期症状。

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Generally speaking, the incubation period or the premonitory symptoms duration is shorter, the symptom is more serious, the mortality rate is higher.

一般来说，潜伏期或前驱症状持续时间越短，症状越严重，死亡率越高。

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Of the 497 cases with apoplexy, there were 11 kinds of premonitory symptoms, of which headache, dizziness, numbness of the limbs, inarticulate speech, blurred version, etc. are more common.

本文分析了497例中风患者的先兆症状。共出现11种先兆症状，其中以头痛、头晕、肢体麻木，言语不清及视物不清等症状为多。

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