Mitral annular nonplanarity: correlation between annular height/commissural width ratio and the nonplanarity angle.
Warraich, Haider, Bilal Chaudary, Andrew Maslow, Peter Panzica, Jacob Pugsley, and Feroze Mahmood. 2012. “Mitral Annular Nonplanarity: Correlation Between Annular Height/Commissural Width Ratio and the Nonplanarity Angle.”. J Cardiothorac Vasc Anesth 26 (2): 186-90.