She fainted [swooned] at the sight of her own blood.

她一看到自己的血就晕过去了。

《新英汉大辞典》

As luck would have it, a doctor happened to be there when she fainted.

她晕倒时凑巧旁边有一个医生。

《新英汉大辞典》

She fainted as soon as she heard the news.

她一听到这一消息，当时就昏了过去。

《新英汉大辞典》

She signed it. Then,as she started to rise from the table, Azalea Adair fainted and fell to the floor.

VOA: special.2010.06.12

Then, as she started to rise from the table, Azalea Adair fainted and fell to the floor.

VOA: special.2009.01.17

The Old Bailey heard she fainted and was taken to hospital in an ambulance with a policewoman.

BBC: Wife 'murdered husband after row over what to watch on TV'

She fainted on top of the remains of her son, which were covered with a white sheet.

BBC: Grief and fear in Gaza

While at home, she fainted and fell and suffered a concussion that was diagnosed by doctors on Dec. 20.

NPR: Hillary Clinton Back At Work After Hospitalization