<a href="http://www.accessmylibrary.com/article-1G1-275850319/cardiac-condition-called-atrial.html" title="Facts and information about A cardiac condition called atrial fibrillation, the most common cardiac arrhythmia, can increase an individual's risk of stroke by 500%.(NOTEWORTHY)(Brief article)">A cardiac condition called atrial fibrillation, the most common cardiac arrhythmia, can increase an individual's risk of stroke by 500%.(NOTEWORTHY)(Brief article)</a>