399. Causes of atrial fibrillation / When can atrial clot develop? / Options for chemical cardioversion July 6th, 2008 by reuben in afib Atzema 2015 Managing Atrial Fibrillation Review – AnnEM Back Top Tags: card 398. Characteristics of atrial flutter / Treatment / A. flutter with VR>200 suggests 400. When are beta blockers favored in atrial fibrillation rate control? / Special considerations for electrical cardioversion of afib besides clot, anticoagulation issues / Most common PSVT / Classic features of WPW syndrome Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.