有突然眩晕者说明可能并发出血。
The person that dizziness suddenly shows may intercurrent haemorrhage.
当血压突然下降时，大脑无法获得足够血供，从而导致眩晕或头晕眼花。
When blood pressure drops suddenly, the brain is deprived of an adequate blood supply which can lead to dizziness or lightheadedness.
变压性眩晕是一种急性发作性眩晕，在外界压力突然变化且中耳腔内形成相对高压的情况下发生。
Alterobaric vertigo(AV) is a kind of acute paroxysmal vertigo, occurred in the conditions of rapid change of atmospheric pressure and a relative overpressure in the middle ear.
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