Introduction:
Data on the utilization and economic outcomes of catheter ablation in atrial fibrillation (AF) is scarce, limiting the ability to make informed policy decisions.
Hypothesis:
We hypothesized that the number of catheter ablations for AF increased while length of stay and charges decreased.
Methods:
Patients > 18 years undergoing catheter ablation for AF were selected in the 2003-2008 HCUP-Nationwide Inpatient Sample, the largest all-payor inpatient database in the US. Patient demographic and clinical variables, including a Charlson comorbidity index, as well as hospital characteristics were analyzed. We calculated trends in rates of utilization, economic (mean LOS and total inflation-adjusted charges) and clinical (in-hospital mortality and in-hospital complications, defined using ICD-9 codes) outcomes using χ
2
, Mantel-Haenszel tests, and analysis of variance (ANOVA).
Results:
There were 40,145 admissions for catheter ablation for AF (mean age 60.01 years (SD 11.74; Range 18-98). The number of ablations increased by nearly 300% between 2003 and 2008 (Table). A comparison of use rates between 2003-2005 (early) vs 2006-2008 (late) showed a higher utilization among patients aged 65-79 (27.3% vs 34.0%), those with moderate comorbidities (30.3% vs 46.3%), and medium-sized hospitals (9.8% vs 19.7%), all p<0.001. During the study period, the mean LOS decreased by 30% while inflation-adjusted charges increased by 25% (Table). There was no significant change in clinical outcomes (Table).
Conclusions:
The number of catheter ablations for AF has increased rapidly. Although the procedure is being applied to a broader patient population and being performed in smaller-sized hospitals, LOS has decreased and clinical outcomes are stable. Factors contributing to and strategies to limit rising charges for this expanding procedure are important areas of future research.