A lack of sleep or its’ derangement may affect mental activities and remarkably decrease its’ functional level.Scientists recommend a period of 6 to 8 hours of daily sleep.

缺少或紊乱的睡眠，可能会影响大脑活动，而且使大脑功能显著地下降。科学家建议每日睡眠时数6-8小时。

See, the American Heart Association guidelines have established the following: that the goal of post-cardiac arrest management is to return patients to their pre-arrest functional levels.

请参阅，美国心脏协会指南已确定以下内容：心脏骤停后管理的目标是使患者恢复到心脏骤停前的功能水平。