... an ambulance rushed him to Kings County Hospital. (Para. 1)
Meaning: an ambulance sent him quickly to Kings County Hospital.
rush: This verb has both a transitive and intransitive use. Here it is used transitively. Please compare the two uses of the verb:
They rushed out of the house into the street. (intransitive use) 他们匆忙跑出屋子, 来到街上。
They rushed doctors and medical supplies to the scene of the accident.(transitive use) 医生和医疗设备被急送至事故发生地。