#1	(atrial fibrillation OR atrial flutter):ti,ab,kw
#2	Magnetic Resonance Imaging explode all trees OR MeSH descriptor Cardiac Imaging Techniques explode all trees OR MeSH descriptor Tomography, X-Ray Computed explode all trees OR MeSH descriptor Echocardiography explode all trees OR (chads2 OR chads2-vasc OR TEE OR TTE OR ct-scan OR transthoracic echo OR transesophageal echo):ti,ab,kw
#3	MeSH descriptor Stroke explode all trees OR MeSH descriptor Thromboembolism explode all trees OR MeSH descriptor Brain Ischemia explode all trees OR (thromboembolism OR thromboembolic OR brain ischemia OR brain ischaemia OR tia):ti,ab,kw OR (transient ischemic attack):ti,ab,kw or (transient ischaemic attack):ti,ab,kw or (transient ischemia attack):ti,ab,kw or (transient ischaemic attack):ti,ab,kw
#4	#1 AND #2 AND #3
#5	#4, Limits: Cochrane Reviews, 2000 to 2012