Due to various causes, such as brain impairment, environment changes, anxious,et al. patients, who undergo cardiopulmonary bypass, often suffer from poor quality of sleep. In chinese traditional medicine, acupuncture can improve the quality of sleep in patients with sleeping disorder. But it remains acupuncture could improve the quality of sleep in patients with heart operations.

60 patients are divided into three groups. control group: no any intervention; experiment group 1: acupuncture are used in patients before cardiac operation; experiment group 2: acupuncture are used through all the course in hospital.

before operation, before discharge, one month after operation, two month after operation, the quality of sleep are evaluated. and comparisons will be made in three groups.

Inclusion Criteria:

• aging:18yr--65yr
• cardiopulmonary bypass
• NYHA ≤II and EF≥50%
• not illiterate person

Exclusion Criteria:

• neurological disease,mentality disorder
• abuse of alcohol
• long history of smoking
• sleep disorder before admitting to hospital