From: Quantitative Assessment of Mitral Regurgitation: How Best to Do It J Am Coll Cardiol Img. 2012;5(11):1161-1175. doi:10.1016/j.jcmg.2012.07.013 Figure Legend: (A to C) Measurement of mitral annular diameter and mitral inflow velocity time integral (VTI). (D and E) Same measurement for the left ventricular outflow tract. (F) Illustration of regurgitant volume and regurgitant fraction (RF) calculation. Abbreviation as in Figure 1. Date of download: 9/23/2015 Copyright © The American College of Cardiology. All rights reserved.