What is the distinction between Valvular AF and Nonvalvular AF?
Valvular AF refers to AF in the context of moderate to severe mitral stenosis or in the presence of any mechanical heart valve. Nonvalvular AF does not imply the absence of VHD but only the absence of moderate to severe mitral stenosis or mechanical heart valves (ie, AF in the setting of bioprosthetic valves, mild mitral stenosis, and any native aortic, pulmonary, or tricuspid valve disease is still considered nonvalvular).