Study of Continuous Cardiac Monitoring to Assess Atrial Fibrillation After Cryptogenic Stroke

The 2006 American Heart Association / American Stroke Association Council on Stroke
Guidelines for Prevention of Stroke in Patients With Ischemic Stroke or Transient Ischemic
recommended that patients with cryptogenic stroke take antithrombotic drugs (i.e. aspirin)
in order to prevent a second stroke. When a stroke patient is found to have atrial
fibrillation (AF), the guidelines recommend oral anticoagulation due to its superior
efficacy over aspirin for stroke prevention. Physicians can best optimize the use of
medicines only if they can precisely and correctly diagnose a patient's AF. The purpose of
this study is to evaluate the time to first AF by 6 months' continuous rhythm monitoring
versus control treatment in subjects with a recent cryptogenic stroke or Transient Ischemic
Attack (TIA) without history of AF.