Abstract: Objective: To construct a Primary Percutaneous Coronary Intervention process for patients with acute myocardial infarction based on Value Stream Map and to evaluate its application effect, in order to provide reference for improving the treatment efficiency of patients with acute myocardial infarction. Methods: According to the length of hospital stay, patients with acute ST-segment Elevation Myocardial Infarction who underwent Primary Percutaneous Coronary Intervention were divided into control group (n=32) and observation group (n=30). The control group was treated with routine treatment, and the observation group was treated with Primary Percutaneous Coronary Intervention process based on Value Stream Map. The process time, important treatment node time and treatment effect of the two groups were compared. Results: After implementation, the non-value-added time and total process time of the observation group were significantly shortened (P<0.05). The time from admission to balloon dilatation, the acquisition time to obtain the first ECG, the time of troponin reporting and the start-up time of the catheterization room of the observation group were significantly shortened (P<0.05). The cure and discharge rate was higher than that of the control group (P<0.05). Conclusion: The implementation of Primary Percutaneous Coronary Intervention process for patients with acute ST-segment Elevation Myocardial Infarction based on Value Stream Map can promote the efficiency of treatment.

Key words: Value Stream Map; lean medicine; acute ST-segment Elevation Myocardial Infarction; process optimization; emergency medical service