The Medical Information Mart for Intensive Care (MIMIC) database, which aggregates nearly two decades of medical records from the intensive care unit (ICU) at Beth Israel Deaconess Medical Center (BIDMC), encompasses multidimensional data and holds significant value for medical research, clinical decision-making, and healthcare management. This article systematically introduces the modular structure, data categories, data integration methods and explains the key data tables in the MIMIC-IV. The MIMIC database employs rigorous privacy protection and ethical review mechanisms to ensure patient data anonymization and compliance with research use, effectively safeguarding patient privacy while supporting scientific research. In the future, the application value of the MIMIC database can be enhanced through methods such as multi-center data integration, the incorporation of artificial intelligence (AI) technology, and cross-domain data fusion.

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