院外心脏骤停是严重的公共健康问题，是导致死亡的重要原因。
Out -of -hospital cardiac arrest is a serious public health issue, and it is an important factor leading to death.
院外心脏骤停最常发生的场所是家里，这种情形对于急诊医疗提供及时救助提出了挑战。
The most common location of out-of-hospital sudden cardiac arrest is the home, a situation in which emergency medical services are challenged to provide timely care.
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