In this study, FL-PR Stroke Registry will be used to determine novel data on disparities in stroke care and outcomes for patients with Atrial Fibrillation (AF) in 'real life' hospital setting. Investigators will evaluate clinical practice for AF detection and treatment in stroke patients within large stroke hospital systems of care with multi-ethnic patient populations and thereby representative of the states of Florida and Puerto Rico. The results of this study will be of critical importance for secondary stroke prevention by identifying gaps in stroke care for patients with AF and by recognizing the needs for developing targeted interventions to reduce disparities in diverse populations of stroke patients with AF and improve systems of care for all stroke patients with AF.

Inclusion Criteria:

• age is 18 and older
• primary diagnosis of ischemic stroke
• enrolled in the Florida - Puerto Rico Stroke Registry

Exclusion Criteria:

• primary diagnosis of intracerebral hemorrhage
• diagnosis of subarachnoid hemorrhage
• stroke not otherwise specified
• no stroke related diagnosis
• admission for elective carotid intervention only

The study population is derived from the Florida-Puerto Rico Stroke Registry to Reduce Stroke Disparities. In-hospital acute stroke performance measures are documented and obtained through the American Heart Association (AHA) Get With The Guidelines-Stroke (GWTG-S) premier hospital quality improvement program and GWTG-S data collection instruments. Through the GWTG-S data, the Registry currently has close to 169,000 patients enrolled since 2010.