Atrial Fibrillation in Ischemic Stroke

Abstract

Background and Purpose—: Atrial fibrillation (AF) increases the risk of stroke and is associated with poor stroke outcomes. Limited tools are available to evaluate clinical outcomes and response to thrombolysis in stroke patients with AF. Methods—: We applied the iScore ( http://www.sorcan.ca/iscore ), a validated risk score, to consecutive patients with an acute ischemic stroke admitted to stroke centers in the Registry of the Canadian Stroke Network. The main outcome considered was a favorable outcome (defined as a modified Rankin scale 0–2) at discharge after thrombolysis. Secondary outcomes included intracerebral hemorrhage, death at 30 days, and at 1 year stratified by terciles of the iScore. Results—: Among 12 686 patients with an acute ischemic stroke, 2185 (17.2%) had AF. Overall, AF patients had higher risk of death at 30 days (22.3% versus 10.2%; P P P P -value interaction P P =0.17) in patients with AF. Conclusions—: Stroke patients with AF have higher mortality, greater risk of intracerebral hemorrhage, and a similar response trend to thrombolysis compared with non-AF patients.