Prevalence and Determinants of Atrial Fibrillation-associated In-hospital Ischemic Stroke in patients with Acute Myocardial Infarction undergoing Percutaneous Coronary Intervention.

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Atrial Fibrillation (AF) is an established risk factor ischemic stroke (IS) and is commonly encountered in patient hospitalized with acute myocardial infarction (AMI). Uncommonly, IS can occur as a complication resulting from percutaneous coronary intervention (PCI). There is limited real world data regarding AF-associated in-hospital IS (IH-IS) in patients admitted with AMI undergoing PCI. We queried the National Inpatient Sample database from January 2010 to December 2014 to identify patients admitted with AMI who underwent PCI. In this cohort, we determined the prevalence of AF associated IH- IS and compared risk factors for IH-IS between patients with AF and without AF using multivariable logistic regression models. IH-IS was present in 0.46% (n= 5,938) of the patients with AMI undergoing PCI (n= 1,282,829). Prevalence of IH-IS in patients with AF was higher compared to patients without AF (1.05% vs.0.4%; aOR: 1.634, 95% CI: 1.527 -1.748, p< 0.001). Regardless of AF status, prevalence and risk of IH-IS was higher in females and increased with advancing age. There was significant overlap among risk-factors associated with increased risk of IH-IS in AF and non-AF cohorts, except for obesity in AF patients (aOR: 1.268, 95% CI: 1.023- 1.572, p=0.03) in contrast to renal disease, malignancy and peripheral vascular disease in non-AF patients. In conclusion, IH-IS is a rare complication affecting patients undergoing PCI for AMI and is more likely to occur in AF patients, females, and older adults, with heterogeneity among risk factors in patients with and without AF.

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