Study population
This study included NVAF patients with mildly impaired renal function
who were admitted to the First Affiliated Hospital of Nanjing Medical
University for AF catheter ablation and readmitted due to recurrence of
AF between January 2012 and June 2019. The exclusion criteria were as
follows: less than 3 months between the two admissions, and diagnosis of
chronic kidney disease before the index AF catheter ablation.
All clinical characteristics before the index procedure and during
readmission were collected. The Chronic Kidney Disease Epidemiology
Collaboration (CKD-EPI) equation was used to calculate the eGFR to
assess renal function.23