Preventive Narrative Exposure Intervention for PTSD in ICU Patients After Cardiopulmonary Bypass Cardiac Surgery

Inclusion Criteria: 1. Aged 18 years or older. 2. Scheduled to undergo cardiac surgery with cardiopulmonary bypass, with planned postoperative admission to the cardiac surgical intensive care unit and an expected ICU stay of more than 24 hours. 3. The participant is able to communicate effectively, and the participant and family members are willing to cooperate with the study. 4. Conscious before the first postoperative intervention, negative for delirium as assessed by the Confusion Assessment Method for the Intensive Care Unit, and able to understand and complete the intervention and related assessments. Exclusion Criteria: 1. Experienced severe traumatic events within the past year, such as diagnosis of a major disease unrelated to the current cardiac condition in the participant or an immediate family member, or death of an immediate family member or significant other. 2. Currently receiving treatment for mental disorders, including pharmacological treatment or psychotherapy for conditions such as depressive disorder, anxiety disorder, bipolar disorder, or schizophrenia spectrum disorders. 3. History of a clearly diagnosed severe mental disorder, or mental abnormalities caused by organic brain disease.