The prognostic association of atrial fibrillation on heart failure hospitalizations after acute myocardial infarction

Abstract

Aims

The association of atrial fibrillation (AF) with heart failure (HF) specific hospitalizations after acute myocardial infarction (AMI) is unclear. We aim to study the association of AF and 6-month HF hospitalization after an AMI in a large American cohort.

Methods and Results

Adult survivors of a AMI hospitalization without cardiogenic shock were identified from the 2019 US Nationwide Readmissions Database. The unadjusted association of AF (pre-existing and denovo) with baseline characteristics and primary outcome of rate of 6-month HF admission, and secondary outcomes of fatal HF admission, composite of HF peri-AMI or a 6-month HF admission, and a composite of 6-month HF or death during a non−HF-related admission was evaluated using chi square tests or t-tests, and independent associations of AF on outcomes were evaluated using multivariable logistic regression. Cox proportional hazards models were used to identify the association of AF on cumulative incidence risk on HF readmission.

Of 262,390 AMI survivors, AF was present in 18.0%. By 6-months, HF hospitalization occurred in 5.4% of all patients. AF was associated with a higher adjusted risk for 6-month HF admission (OR 1.42, 95% CI: 1.34-1.50). In the adjusted time-to-event analysis, AF was associated with a higher risk for 6-month HF readmission (HR 1.39, 95% CI 1.31-1.46, P<0.001). AF was associated with a higher risk for fatal HF and the composite outcomes.

Conclusions

AF was present in 1 in 6 AMI survivors without cardiogenic shock and AF was associated with a higher risk of HF hospitalization in the subsequent 6-month period.

Cumulative Incidence Curves

Outcomes Table

Author notes

Funding Acknowledgements: None.