Data collection
ATRIAL FIBRILLATION
With "Atrial Fibrillation" as the search term, all patients hospitalized in the department of cardiovascular medicine from January 2018 to December 2020 were retrieved, and basic information of patients, including age, sex and ID number, were collected. Retrieval logic written in R language was used to automatically retrieve other relevant information such as medical history, physical examination, echocardiogram indexes, laboratory examination, procedural recordings, discharge medication and follow-up records, from the medical record management system. Basic information and data extracted by the retrieval logic were reviewed by two expert physicians to ensure accuracy. Patients were excluded based on the joint consensus of the two physicians if their information did not meet the criteria. The data collection flowchart is shown in Fig. Study flowchart. LAAC left atrial appendage closure, PVI, pulmonary vein isolation