常见面色苍白、四肢湿冷、出冷汗、头晕、恶心、心跳急速、脉搏细弱、呼吸表浅甚至昏迷不醒等症状，这些症状可能发生在昏厥之前或当中。

The symptom includes pale face, cold moist limbs, cold sweat, dizziness, nausea, rapid heartbeat, weak pulse, shallow breath, unconscious, etc. These symptoms may appear before or during the coma.

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呼吸显得表浅，并且时常中断。

The respiration appears superficial, and is interrupted now and then.

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