、。
She let out a shrill scream and fainted.
Literal
She [topic-は] metal-cutting voice [object-を] raised, fainted.
金切り声 is one of Japanese's gloriously vivid compound nouns: 金 (metal) + 切る (cut) + 声 (voice) = 'a voice that cuts metal' — a piercing, ear-splitting shriek. The image is of a sound so high and sharp it could slice through steel. Followed by the te-form 上げて ('having raised') chaining sequentially into 気絶した ('fainted'), the sentence delivers a quick action sequence: scream, then faint.