NPPB and hydrops fetalis: Before PSM, there were differences between ACEI and ARNI in some baseline variables, such as sex, AF type, history of HF, history of renal insufficiency, TC, HDL-c, LDL-c, eGFR, serum creatinine, brain natriuretic peptide (BNP), LAD, LVEF, superior vena cava (SVC) isolation, LA CFAE ablation, LA linear ablation, NYHA functional class, and drugs (Table 1).