Intervention：

The control group received routine nursing interventions, including assessment of general information, guidance on rest and diet, health education, and discharge instructions. (1) General Data Assessment: The investigator systematically collected complete demographic data from patients while monitoring vital signs and administering standardized scales. All data collection employed a dual-verification mechanism to ensure accuracy. (2) Rest and Dietary Intervention: Patients undergoing PCI received phased rehabilitation interventions. Initial focus was on environmental control measures, maintaining soft lighting and noise reduction in the ward, and standardizing visitation protocols to ensure therapeutic rest. Concurrently, a nutritional guidance plan was implemented, emphasizing total calorie intake control, prioritizing foods rich in unsaturated fatty acids and dietary fiber, establishing a regular meal schedule with fixed portions, and incorporating physical interventions such as abdominal massage to promote intestinal motility. (3) Health Education: Postoperatively, patients receive health education to optimize health trajectories and prevent disease-related risk factors. (4) Discharge Guidance: Post-discharge health education is provided via telephone or WeChat, reminding patients of scheduled follow-ups. For those unable to attend, the investigator personally tracks follow-up procedures, collecting efficacy assessment data through a combination of telephone consultations and outpatient visits.

Intervention：

Intervention Content: Conduct motivational interviewing for patients undergoing PCI for myocardial infarction, in addition to routine care. 1.First Interview: On the day of surgery, conduct a face-to-face individual intervention in the teaching room or ward, lasting 15-30 minutes. The purpose of this stage is to use open-ended questions to understand the patient's core concerns and internal conflicts. Through empathy, a non-judgmental attitude, and responsive listening, a collaborative relationship is established, making the patient feel respected and understood. This helps shift focus from vague distress to specific, actionable areas for change. Key topics include understanding the patient's medical history, treatment experiences, and encountered difficulties, laying the foundation for trust and empathy. Understand the patient's perspective on their illness and correct any misconceptions. Inquire about lifestyle habits (smoking/drinking habits, dietary preferences, sleep quality), personal preferences, and gradually transition to discussing exercise habits. Assess, acknowledge, and accept any negative emotions arising during exercise, gradually focusing on the theme of exercise-related fears. Avoid direct confrontation and promptly employ appropriate methods to address the patient's psychological concerns related to exercise anxiety. Conclude by expressing gratitude and scheduling the next appointment. 2.Second Interview: Day 1 post-surgery. Conduct a 15-30 minute face-to-face individual intervention in a teaching room or hospital ward. The purpose of this stage is to help patients uncover deeper motivations for change from their goals and needs, accept the universality of conflicting emotions, and guide them to weigh the pros and cons of "maintaining the status quo" versus "change," thereby strengthening their confidence and commitment to change. Key discussion points include: Discussions with patients about the consequences of avoiding exercise post-surgery lay the groundwork for recognizing its importance. Patients are assisted in recalling their preferred exercise types and past experiences to rekindle motivation. Jointly envisioning post-surgery exercise routines and their benefits strengthens patients' belief in exercise. Patients are encouraged to suggest ways to boost their post-surgery exercise enthusiasm, fostering engagement to heighten their passion for physical activity. The session concludes with gratitude and scheduling the next interview. 3. Third Interview: Day 2 post-surgery. Conducted face-to-face in a classroom or ward setting, lasting 15-30 minutes. This phase aims to help patients transition from abstract change intentions to actionable behavioral goals, collaboratively develop feasible strategies, and strengthen their sense of involvement and autonomy. The discussion primarily involves jointly planning current and post-discharge exercise regimens based on the patient's current health status, exercise habits, and preferences. This fully leverages the patient's autonomy in disease management, transforming them from a passive recipient to an active participant, thereby boosting self-efficacy and reducing exercise anxiety. Finally, express gratitude to the patient and schedule the next interview. 4. Fourth Interview: Conducted one month post-discharge via WeChat or phone, this one-on-one intervention lasts 15-30 minutes. The purpose is to help patients objectively assess the impact of their current changes, identify and resolve challenges encountered during the process, thereby enhancing self-efficacy and strengthening their commitment to long-term change. Key discussion points include: - Tracking interview effectiveness and affirming exercise achievements to build confidence. - Understanding recent exercise experiences and assessing current fear levels during activity. - Guiding patients to reflect on changes and benefits from consistent exercise to strengthen long-term commitment. - Identifying challenges in the exercise rehabilitation process, integrating available resources, and adjusting exercise plans as needed to enhance willingness and ability for sustained activity. - Concluding with gratitude and scheduling the next session. 5. Fifth Interview: Conducted one month post-discharge via WeChat or phone, this 15-30 minute one-on-one intervention aims to clarify immediate commitments, reinforce intrinsic motivation, and prevent wavering resolve due to conflicting emotions or short-term challenges. Key discussion points include: - Reaffirming progress made during this period to bolster confidence in continued change and highlight exercise's positive impacts. - Assessing current exercise status and feelings, identifying potential barriers, and developing coping strategies. - For patients contemplating quitting, employ OARS skills (Open-ended questions, Affirmation, Reflective listening, Summarizing) to refocus attention, reflect on, and discuss current challenges. - Conclude by thanking the patient and scheduling the next session. 6. Sixth Interview: Conducted via WeChat or phone call at three months post-discharge, lasting 15-30 minutes. This phase aims to translate short-term successes into sustained momentum through positive reinforcement and future-oriented dialogue. Key discussion points include: - Continuing to affirm the patient's progress to strengthen confidence in long-term change. - Understanding the patient's current physical and emotional state. - Guiding the patient to reflect on changes from the first to the final session. - Using semi-open-ended questions to encourage the patient to describe their current feelings, future confidence, and aspirations. - Discussing future strategies and methods for overcoming exercise-related fears and maintaining physical activity. Conclude by thanking the patient and offering ongoing resources and open communication channels.